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This chapter describes the commands to configure data-link switching plus (DLSw+), our implementation of the DLSw standard. For DLSw+ configuration tasks and examples, refer to the "Configuring Data-Link Switching Plus" chapter of the Bridging and IBM Networking Configuration Guide. For specific SDLC commands to configure DLSw+ for SDLC, refer to the "LLC2 and SDLC Commands" chapter in this publication.
Use the clear dlsw circuit privileged EXEC command to cause all DLSw+ circuits to be closed.
clear dlsw circuitThis command has no arguments or keywords.
Privileged EXEC
This command first appeared in Cisco IOS Release 11.2 F.
 | Caution This command also drops the associated LLC2 session. The command usage should be used with caution and under the advice of a Cisco engineer. |
The following example closes all DLSw+ circuits:
clear dlsw circuit
This command has no arguments or keywords.
Privileged EXEC
This command first appeared in Cisco IOS Release 11.2 F.
This command does not affect existing sessions.
The following example removes all entries from the dlsw reachability cache:
clear dlsw reachability
This command has no arguments or keywords.
Privileged EXEC
This command first appeared in Cisco IOS Release 11.2 F.
The following example resets to zero the number of frames in the local, remote, and group cache:
clear dlsw statistics
Use the dlsw allroute-netbios global configuration command to change the single-route explorer to an all-route broadcast for NetBIOS. Use the no form of this command to return to the default single-route explorer.
dlsw allroute-netbiosThis command has no arguments or keywords.
Single-route explorer.
Global configuration
This command first appeared in Cisco IOS Release 11.1.
The following example specifies all-route broadcasts:
dlsw allroute-netbios
Use the dlsw allroute-sna global configuration command to change the single-route explorer to an all-route broadcast for SNA. Use the no form of this command to return to the default single-route explorer.
dlsw allroute-snaThis command has no arguments or keywords.
Single-route explorer.
Global configuration
This command first appeared in Cisco IOS Release 11.1.
The following example specifies all-route broadcasts:
dlsw allroute-sna
Use the dlsw bgroup-list global configuration command to map traffic on the local Ethernet bridge group interface to remote peers. Use the no form of this command to cancel the map.
dlsw bgroup-list list-number bgroups number
list-number | The ring list number. This number is subsequently used in the dlsw remote-peer command to define the segment to which the bridge-group should be applied. The valid range is 1 to 255. |
bgroups | The transparent bridge group to which DLSw+ will be attached. The valid range is 1 to 63. |
number | The transparent bridge group list number. The valid range is 1 to 63. |
There is no default setting.
Global configuration
This command first appeared in Cisco IOS Release 11.0.
Traffic received from a remote peer is forwarded only to the bridge group specified in the bridge group list. Traffic received from a local interface is forwarded to peers if the input bridge group number appears in the bridge group list applied to the remote peer definition. The definition of a bridge group list is optional. Each remote peer has a single list number associated with it; therefore, if you want traffic to go to a bridge group and to either a ring list or port list, you should specify the same list number in each definition.
The following example configures bgroup list 1:
dlsw bgroup-list 1 bgroups 33
You can use the master indexes or search online to find documentation of related commands.
dlsw bridge-group
dlsw ring-list
Use the dlsw bridge-group global configuration command to link DLSw+ to the bridge group of the Ethernet LANs. Use the no form of this command to disable the link.
dlsw bridge-group group-number [llc2 [N2 number] [ack-delay-time milliseconds]
group-number | The transparent bridge group to which DLSw+ will be attached. The valid range is 1 to 63. |
llc2 | LLC2 interface subcommands. |
N2 number | Number of times router should retry various operations. |
ack-delay-time milliseconds | Max time the router allows incoming I-frames to stay unacknowledged. |
ack-max number] | Max number of I-frames received before an acknowledgment must be sent. |
idle-time milliseconds | Frequency of polls during periods of idle traffic. |
local-window number | Max number of I-frames to send before waiting for an acknowledgment. |
t1-time milliseconds] | How long router waits for an acknowledgment to transmitted I-frames. |
tbusy-time milliseconds | Amount of time router waits while the other LLC2 station is in a busy state before attempting to poll the remote station. |
tpf-time milliseconds | Amount of time router waits for a final response to a poll frame before re-sending the original poll frame. |
trej-time milliseconds | Amount of time router waits for a resend of a rejected frame before sending the reject command. |
txq-max number | Queue for holding llc2 information frames. |
xid-neg-val-time milliseconds] | Frequency of exchange of identification (XID). |
xid-retry-time milliseconds | How long router waits for reply to XID The valid range is 1 to 60000. |
locaddr-priority | Assign an input SNA LU Addr priority list to this bridge group. |
sap-priority | Assign an input sap priority list to this bridge group. |
There is no default setting.
Global configuration
This command first appeared in Cisco IOS Release 11.0.
More than one bridge group can be attached to DLSw+ by using this command multiple times. Multiple bridge group support is available in Cisco IOS Release 11.3.
The following example links DLSw+ to bridge group 1, 2 and 3:
dlsw local-peer peer-id 1.1.1.1 dlsw remote-peer 0 tcp 2.2.2.2 dlsw bridge-group 1 dlsw bridge-group 2 dlsw bridge-group 3 interface Ethernet0 bridge-group 1 interface Ethernet1 bridge-group 2 interface Ethernet2 bridge-group 3 bridge 1 protocol ieee bridge 2 protocol ieee bridge 3 protocol ieee
You can use the master indexes or search online to find documentation of related commands.
Use the dlsw disable global configuration command to disable and reenable DLSw+ without altering the configuration.
dlsw disableThis command has no arguments or keywords.
There is no default setting.
Global configuration
This command first appeared in Cisco IOS Release 11.0.
The following example re-enables DLSw+:
no dlsw disable
load-balance | (Optional) Specifies that sessions are load-balanced across duplicate paths. |
Fault-tolerance is the default logic used to handle duplicate paths.
Global configuration
This command first appeared in Cisco IOS Release 11.0.
A path is either a remote peer or a local port.
In full-tolerance mode, the preferred path is always used unless it is unavailable. The preferred path is either the path over which the first response to an explorer was received, or, in the case of remote peers, the peer with the least cost.
The following example specifies load balancing to resolve duplicate paths:
dlsw duplicate-path-bias load-balance
Use the dlsw group cache disable global configuration command to disable the border peer caching feature. Use the no form of this command to return to the default peer caching feature.
dlsw group-cache disableThis command has no arguments or keywords.
This command is enabled by default.
Global configuration
This command first appeared in Cisco IOS Release 11.2 F.
If a border peer becomes a non-border peer, then the group cache is automatically deleted.
This command prevents a border peer from learning reachability information from relay responses. This command also prevents a border peer from using local or remote caches to make forwarding decisions.
The following example disables the group cache:
dlsw group-cache disable
You can use the master indexes or search online to find documentation of related commands.
number | Maximum number of entries allowed in the group cache. The valid range is 0 through 12000. If the value is set to 0, then there is no limit to the number of entries. The default is 2000. |
The default setting is 2000.
Global configuration
This command first appeared in Cisco IOS Release 11.2 F.
Once the number of entries has reached the maximum number specified, if a new entry needs to be added an entry will be removed to make room.
The value set for cache max applies to both the NetBIOS and SNA group cache.
The following configuration defines the maximum number of entries allowed in the NetBIOS or SNA group cache as 1800:
dlsw group-cache max-entries1800
You can use the master indexes or search online to find documentation of related commands.
Use the dlsw icannotreach saps global configuration command to configure a list of service access points (SAPs) not locally reachable by the router. Use the no form of this command to remove the list.
dlsw icannotreach saps sap [sap...]
sap sap... | Array of SAPs. |
No lists are configured.
Global configuration
This command first appeared in Cisco IOS Release 10.3
The dlsw icannot reach saps command causes the local router to send a control vector to its peers during the capabilities exchange, which tells the peers not to send canureach messages to the local router for sessions using those DSAPs. (They are DSAPs from the peer's perspective, and SSAPs from the perspective of the devices attached to the local router.) The effect is that devices attached to the peer will not be able to initiate sessions to devices attached to the local router using the listed DSAPs. Devices attached to the local router, however, will still be able to start sessions with devices on its peers using the listed saps as SSAPs. The reason is that the local router can still send canureach requests to its peers, since no filtering is actually done on the local router. The filtering done by the peers does not prohibit the peers from responding to canureach requests from the local router sending the control vector, only sending canureach requests to the local router.
The following example specifies a list of SAPs that are not reachable:
dlsw icannotreach saps F0
Use the dlsw icanreach global configuration command to configure a resource that is locally reachable by this router. Use the no form of this command to remove the resource.
dlsw icanreach {mac-exclusive | netbios-exclusive | mac-address mac-addr
mac-exclusive | Router can reach only the MAC addresses that are user configured. |
netbios-exclusive | Router can reach only the NetBIOS names that are user configured. |
mac-address mac-addr | Configures a MAC address that this router can locally reach. |
mask mask | (Optional) MAC address mask in hexadecimal h.h.h. The mask indicates which bits in the MAC address are relevant. |
netbios-name name | Configures a NetBIOS name that this router can locally reach. Wildcards (*) are allowed at the end of the name. Trailing white spaces are ignored when comparing against an actual name in a NetBIOS frame. |
saps | (Optional) Array of saps. |
No resources are configured.
Global configuration
This command first appeared in Cisco IOS Release 11.0.
This command can be entered at any time. It causes a capabilities exchange to relay the information to all active peers. By specifying resource names or MAC addresses in this command, you can avoid broadcasts from remote peers that are looking for this resource. By specifying "exclusive" you can avoid broadcasts to this router or any resources. For example, you could configure the front-end processor (FEP) MAC address or corporate site LAN servers in central site routers to avoid any broadcasts over the WAN for these resources.
The following example indicates that this peer only has information about a single NetBIOS server, and that no peers should send this peer explorers searching for other NetBIOS names:
dlsw icanreach netbios-exclusive
dlsw icanreach netbios-name lanserv
You can use the master indexes or search online to find documentation of related commands.
The command is disabled by default.
Global configuration
This command first appeared in Cisco IOS Release 11.0.
This command is used when any device does not handle the LLC2 RNR frames.
The following configuration keeps the receiver not ready message from being sent when establishing an LLC2 connection.
router# dlsw llc2 nornr
The following is output from a sniffer trace showing when it would be appropriate to use the dlsw llc2 nornr command because the RNR message is being rejected from the FEP when the router is trying to establish an LLC2 connection
SUMMARY Delta T From 400020401003 From 400023491026 8 0.173 LLC C D=00 S=04 TEST P 9 0.003 LLC R D=04 S=00 TEST F 10 0.002 SNA XID Fmt 2 T4 11 0.059 SNA XID Fmt 2 T4 12 0.004 SNA XID Fmt 2 T4 13 0.065 SNA XID Fmt 2 T4 14 0.005 SNA XID Fmt 2 T4 16 0.054 LLC C D=04 S=04 SABME P 17 0.003 LLC R D=04 S=04 UA
The router sends a receiver not ready message.
18 0.001 LLC C D=04 S=04 RNR NR=0
From frames 19 to 35, the FEP does not respond.
19 0.002 LLC C D=04 S=04 RR NR=0 20 0.048 SNA C NC NC-ER-OP 21 0.997 LLC C D=04 S=04 RR NR=0 P 22 1.000 LLC C D=04 S=04 RR NR=0 P 24 1.000 LLC C D=04 S=04 RR NR=0 P 25 1.000 LLC C D=04 S=04 RR NR=0 P 31 1.000 LLC C D=04 S=04 RR NR=0 P 32 1.000 LLC C D=04 S=04 RR NR=0 P 34 1.000 LLC C D=04 S=04 RR NR=0 P 35 1.000 LLC C D=04 S=04 RR NR=0 P
The router disconnects the circuit.
37 1.000 LLC C D=04 S=04 DISC P 38 0.002 LLC R D=04 S=04 UA F
The sequence repeats.
39 0.179 LLC C D=00 S=04 TEST P 41 0.767 SNA XID Fmt 2 T4 42 0.634 SNA XID Fmt 2 T4 43 0.173 LLC C D=00 S=04 TEST 44 0.003 LLC R D=04 S=00 TEST F 45 0.002 SNA XID Fmt 2 T4 46 0.060 SNA XID Fmt 2 T4 47 0.004 SNA XID Fmt 2 T4 48 0.063 SNA XID Fmt 2 T4 49 0.005 SNA XID Fmt 2 T4
Use the dlsw local-peer global configuration command to define the parameters of the DLSw+ local peer. Use the no form of this command to cancel the definitions.
dlsw local-peer [peer-id ip-address] [group group] [border] [cost cost]
peer-id ip-address | (Optional) Local peer IP address; required for Fast-Sequenced Transport (FST) and TCP. |
group group | (Optional) Peer group number for this router. The valid range is 1 to 255. |
border | (Optional) Enables as a border peer. Group option must be specified in order to use the border peer option. |
cost cost | (Optional) Peer cost advertised to remote peers in the capabilities exchange. The valid range is 1 to 5. |
lf size | (Optional) Largest frame size for this local peer. Valid sizes are the following: |
keepalive seconds | (Optional) Default remote peer keepalive interval in seconds. The valid range is 0 to 1200 seconds. The default is 30 seconds. The value 0 means no keepalives. |
passive | (Optional) Specifies that this router will not initiate remote peer connections to configured peers. |
promiscuous | (Optional) Accepts connections from nonconfigured remote peers. |
biu-segment | (Optional) Causes DLSw+ to spoof the maximum receivable I-frame size in XID so that each end station sends the largest frame it can. |
init-pacing-window size | (Optional) Size of the initial pacing window, as defined in RFC 1795. The valid range is 1-2000. |
max-pacing-window size | (Optional) Maximum size of the pacing window, as defined in RFC 1795. The valid range is 1-2000. |
No parameters are defined.
Global configuration
This command first appeared in Cisco IOS Release 10.3.
When there are multiple peers to a given destination, use the cost keyword to determine which router is preferred and which is capable. The cost keyword only applies in fault tolerance mode.
The biu-segment option is a performance/utilization improvement. If a frame that arrives from a remote peer is too large for the destination station to handle, DLSw+ segments the frame. If you choose to implement this option, you must add the option to both DLSw peer partners.
The following command defines the local peer IP address and specifies the peer group number for this router:
dlsw local-peer peer-id 10.2.17.1 group 2
You can use the master indexes or search online to find documentation of related commands.
dlsw duplicate-path-bias
show dlsw capabilities
Use the dlsw mac-addr global configuration command to configure a static MAC address. Use the no form of this command to cancel the configuration.
dlsw mac-addr mac-addr {ring ring -number| remote-peer {interface serial number |
mac-addr | Specifies the MAC address. |
ring ring-number | Maps the MAC address to a ring number or ring group number. The valid range is 1 to 4095. |
remote-peer | Maps the MAC address to a specific remote peer. |
interface serial number | Specifies the remote peer by direct serial interface. |
ip-address ip-address | Specifies the remote peer by IP address. |
rif rif-string | Maps the MAC address to a local interface using a RIF string. The RIF string describes a source-routed path from the router to the MAC address. It starts at the router's ring-group and ends on the ring where the MAC address is located. The direction should be from the router toward the MAC address. See IEEE 802.5 standard for details. |
group group | Maps the MAC address to a specified peer group. Valid numbers are in the range 1 to 255. |
No static MAC address is configured.
Global configuration
This command first appeared in Cisco IOS Release 11.0.
You can statically define resources to prevent the Cisco IOS software from sending explorer frames for the specified resource. For example, you can include the MAC address of a FEP in the configuration for each remote router to eliminate any broadcasts that are searching for a FEP. Alternatively, you can specify a single dlsw icanreach statement in the router attached to the FEP indicating the MAC address of the FEP. This information is sent to all remote routers as part of the capabilities exchange.
The following example maps the static MAC address 1000.5A12.3456 to the remote peer at IP address 10.17.3.2:
dlsw mac-addr 1000.5A12.3456 remote-peer ip-address 10.17.3.2
You can use the master indexes or search online to find documentation of related commands.
Use the dlsw max-multiple-rifs global configuration command to enable caching of multiple RIFs per interface. Use the no form of this command to turn off the feature.
dlsw max-multiple-rifs multiple-rifs-per-port
multiple-rifs-per-port | Number of multiple RIF entries per interface. The valid range is 1 to 4. |
The deafult value is 1.
Global configuration
This command first appeared in Cisco IOS Release 11.3.
A MAC address or NetBIOS name can have several RIF entries. Prior to this command, DLSw+ could cache only one of these RIF entries per local Token Ring port. With the dlsw max-multiple-rifs command configured, however, DLSw+ can cache multiple RIF enties (up to 4) for a specific MAC address or NetBIOS name on one token ring port.
If the value 1 is specified, multiple RIF caching is not enabled.
The following example enables the router to cache up to 2 RIFs per interface:
dlsw max-multiple-rifs 2
This command has no arguments or keywords.
Disabled
Global configuration
This command first appeared in 11.2 F.
See the "Bridging and IBM Networking Overview" chapter of the Bridging and IBM Networking Configuration Guide for more details on the NetBIOS DDR feature.
The following example enables NetBIOS DDR:
dlsw netbios-keepalive-filter
Use the dlsw netbios-name global configuration command to configure a static NetBIOS name. Use the no form of this command to cancel the configuration.
dlsw netbios-name netbios-name {ring ring-number | remote-peer {interface serial number |
netbios-name | Specifies the NetBIOS name. Wildcards are allowed. |
ring ring number | Maps the NetBIOS name to a ring number or ring group number. Test frames for this name will only be sent to LAN ports in this ring group. |
remote-peer | Maps the NetBIOS name to a specific remote peer. |
interface serial number | Specifies the remote peer by direct interface. |
ip-address ip-address | Specifies the remote peer by IP address. |
rif rif- string | Maps the MAC address to a local interface using a RIF string. The RIF string describes a source-routed path from the router to the MAC address. It starts at the router's ring-group and ends on the ring where the MAC address is located. The direction should be from the router towards the MAC address. See IEEE 802.5 standard for details |
group group | Maps the NetBIOS name to a specified peer group. Valid numbers are in the range 1 to 255. |
No static NetBIOS name is configured.
Global configuration
This command first appeared in Cisco IOS Release 11.0.
The following example configures a static NetBIOS name and links it to group 3:
dlsw netbios-name netname group 3
You can use the master indexes or search online to find documentation of related commands.
fst | (Optional) Use FST encapsulation for all peers-on-demand being established by this router. |
bytes-netbios-out bytes-list-name | (Optional) Configures NetBIOS bytes output filtering for peer-on-demand peers. The bytes-list-name is the name of the previously defined netbios bytes access list filter. |
cost cost | (Optional) Specifies the cost to reach peer-on-demand peers. The valid range is 1 to 5. The default cost is 3. |
dest-mac destination mac address | (Optional) Specifies the exclusive destination MAC address for peer-on-demand peers. |
dmac-output-list access list number | (Optional) Specifies the filter output destination MAC addresses. |
host-netbios-out host-list-name | (Optional) Configures NetBIOS host output filtering for peer-on-demand peers. The host-list-name is the name of the previously defined NetBIOS host access list filter. |
inactivity minutes | (Optional) Configures the length of time after the peer's circuit count is zero that the peer-on-demand is disconnected. The valid range is 0 to1440 seconds. The default is 10 minutes. |
keepalive seconds | (Optional) Configures the peer-on-demand keepalive interval. The valid range is 0 to 1200 seconds. The default is 30 seconds. |
lf size | (Optional) Largest frame size for this remote peer. Valid sizes are the following: |
lsap-output-list list | (Optional) Configures local service access point (LSAP) output filtering for peer-on-demand peers. Valid numbers are in the range 200 to 299. |
port-list port-list-number | (Optional) Configures a port list for peer-on-demand peers. Valid numbers are in the range 0 to 4095. |
priority | (Optional) Configures prioritization for peer-on-demand peers. The default state is off. |
tcp-queue-max | (Optional) Configures the maximum output TCP queue size for peer-on-demand peers. |
The default peer-on-demand transport is TCP.
Global configuration
This command first appeared in Cisco IOS Release 11.0.
The following example configures FST for peer-on-demand transport:
dlsw peer-on-demand-defaults fst
You can use the master indexes or search online to find documentation of related commands.
Use the dlsw port-list global configuration command to map traffic on a local interface (Ethernet, Token Ring, or serial) to remote peers. Use the no form of this command to disable the previous map assignment.
dlsw port-list list-number type number
list-number | Port list number. The valid range is 1 to 255. |
type | Interface type. |
number | Interface number. |
No port list is configured.
Global configuration
This command first appeared in Cisco IOS Release 11.0.
Traffic received from a remote peer is forwarded only to the ports specified in the port list. Traffic received from a local interface is forwarded to peers if the input port number appears in the port list applied to the remote peer definition. The definition of a port list is optional.
The following example configures a DLSw peer port list for token ring interface 1:
dlsw port-list 3 token ring 1
You can use the master indexes or search online to find documentation of related commands.
dlsw bgroup-list
dlsw ring-list
bytes-netbios-out bytes-list-name | (Optional) Configures NetBIOS bytes output filtering for promiscuous peers. The bytes-list-name is the name of the previously defined NetBIOS bytes access list filter. |
cost cost | (Optional) Specifies the cost to reach promiscuous peers. The valid range is 1 to 5. The default cost is 3. |
dest-mac destination mac address | Specifies the exclusive destination MAC address for promiscuous peers. |
dmac-output-list access list number | Specifies the filter output destination MAC addresses. |
fst | (Optional) Use FST encapsulation for all prom peers being established by this router. |
host-netbios-out host-list-name | (Optional) Configures NetBIOS host output filtering for promiscuous peers. The host-list-name is the name of the previously defined NetBIOS host access list filter. |
keepalive seconds | (Optional) Configures the promiscuous keepalive interval. The valid range is 0 to 1200 seconds. The default is 30 seconds. |
lf size | (Optional) Largest frame size for this promiscuous peer. Valid sizes are the following: |
lsap-output-list list | (Optional) Configures LSAP output filtering for promiscuous peers. Valid numbers are in the range 200 to 299. |
tcp-queue-max size | (Optional) Configures the maximum output TCP queue size for promiscuous peers. |
The default prom-peer transport is TCP.
Global configuration
This command first appeared in Cisco IOS Release 11.0.
The following example configures cost for promiscuous peers:
dlsw prom-peer-defaults cost 4
You can use the master indexes or search online to find documentation of related commands.
Use the dlsw remote-peer frame relay global configuration command to specify the remote peer with which the router will connect. Use the no form of this command to disable the previous assignments.
dlsw remote-peer list-number frame-relay interface serial number dlci-number
list-number | Ring list number. The valid range is 1 to 255. The default is 0, which means DLSw+ forwards explorers over all ports or bridge groups on which DLSw+ is enabled. |
interface serial number | Serial interface number of the remote peer with which the router is to communicate. |
dlci-number | DLCI number of the remote peer. |
backup-peer ip-address | (Optional) IP address of the existing TCP/FST peer for which this peer is the backup peer. |
backup-peer frame-relay interface serial number dlci-number | (Optional) Serial interface and DLCI number of the existing Direct /LLC2 frame-relay peer for which this peer is the backup peer. |
backup-peer interface name | (Optional) Interface name of the existing direct peer for which this peer is the backup peer. |
bytes-netbios-out bytes-list-name | (Optional) Configures NetBIOS bytes output filtering for this peer. The bytes-list-name argument is the name of the previously defined NetBIOS bytes access list filter. |
cost cost | (Optional) Cost to reach this remote peer. The valid range is 1 to 5. |
dest-mac mac-address | (Optional) Permits the connection to be established only when there is an explorer frame destined for the specified 48-bit MAC address written in dotted triplet form. |
dmac-output-list access-list-number | (Optional) Permits the connection to be established only when the explorer frame passes the specified access list. The access-list-number is the list number specified in the access-list command. |
host-netbios-out host-list-name | (Optional) Configures NetBIOS host output filtering for this peer. The host-list-name is the name of the previously defined NetBIOS host access list filter. |
keepalive seconds | (Optional) Sets the keepalive interval for this remote peer. The range is 0 to 1200 seconds. |
lf size | (Optional) Largest frame size, in bytes, this local peer will use on a circuit to avoid segmented frames. Valid sizes are 516, 1470, 1500, 2052, 4472, 8144, 11407, 11454, and 17800 bytes. |
linger minutes | (Optional) Configures length of time the backup peer remains connected after the primary peer connection is reestablished. The valid range is 1 to 300 minutes. The default is 5 minutes. |
lsap-output-list list | (Optional) Filters output IEEE 802.5 encapsulated packets. Valid access list numbers are in the range 200 to 299. |
passive | (Optional) Designates this remote peer as passive. |
pass-thru | (Optional) Selects passthrough mode. The default is local acknowledgment mode. |
No remote peers are specified.
Global configuration
This command first appeared in Cisco IOS Release 11.0. The following keywords and arguments first appeared in Cisco IOS Release 11.2: dest-mac mac-address, dmac-output-list access-list-number and linger minutes.
The cost keyword specified in a remote peer statement takes precedence over the cost learned as part of the capabilities exchange with the remote peer. The cost keyword is relevant only in fault tolerance mode.
When you need to permit access to only a single MAC address, the dest-mac option is a shortcut over the dmac-output-list option.
When pass-thru is not specified, traffic will be locally acknowledged and reliably transported in LLC2 across the WAN.
The following example specifies a DLSw Lite peer as a backup to a primary direct peer:
dlsw remote-peer 0 frame-relay interface serial 1 40 pass-thru dlsw remote-peer 0 frame-relay interface serial 0 30 backup-peer frame-relay interface serial 1 40
The following example specifies Frame Relay encapsulation connection for remote peer transport:
dlsw remote-peer 0 frame-relay interface 0 30
You can use the master indexes or search online to find documentation of related commands.
Use the dlsw remote-peer fst global configuration command to specify an FST encapsulation connection for remote peer transport. Use the no form of this command to disable the previous FST assignments.
dlsw remote-peer list-number fst ip-address [backup-peer [ip-address | frame-relay
list-number | Ring list number. The valid range is 1 to 255. The default is 0, which means DLSw+ forwards explorers over all ports or bridge groups on which DLSw+ is enabled. |
ip-address | IP address of the remote peer with which the router is to communicate. |
backup-peer ip-address | (Optional) IP address of the existing TCP/FST peer for which this peer is the backup peer. |
backup-peer frame-relay-interface serial number dlci number | (Optional) Serial interface and DLCI number of the existing Direct /LLC2 frame-relay peer for which this peer is the backup peer. |
backup-peer interface name | (Optional) Interface name of the existing direct peer for which this peer is the backup peer. |
bytes-netbios-out bytes-list-name | (Optional) Configures NetBIOS bytes output filtering for this peer. The bytes-list-name argument is the name of the previously defined NetBIOS bytes access list filter. |
cost cost | (Optional) Cost to reach this remote peer. The valid range is 1 to 5. |
dest-mac mac-address | (Optional) Permits the connection to be established only when there is an explorer frame destined for the specified 48-bit MAC address written in dotted triplet form. |
dmac-output-list access-list-number | (Optional) Permits the connection to be established only when the explorer frame passes the specified access list. The access-list-number is the list number specified in the access-list command. |
host-netbios-out host-list-name | (Optional) Configures NetBIOS host output filtering for this peer. The host-list-name is the name of the previously defined NetBIOS host access list filter. |
keepalive seconds | (Optional) Sets the keepalive interval for this remote peer. The range is 0 to 1200 seconds. |
lf size | (Optional) Largest frame size this local peer will use on a circuit to avoid segmented frames. Valid sizes are 516, 1470, 1500, 2052, 4472, 8144, 11407, 11454, and 17800 bytes. |
linger minutes | (Optional) Configures length of time the backup peer remains connected after the primary peer connection is reestablished. The valid range is 1 to 300 minutes. The default is 5 minutes. |
lsap-output-list list | (Optional) Filters output IEEE 802.5 encapsulated packets. Valid access list numbers are in the range 200 to 299. |
passive | (Optional) Designates this remote peer as passive. |
No FST encapsulation connection is specified.
Global configuration
This command first appeared in Cisco IOS Release 10.3. The following keywords and arguments first appeared in Cisco IOS Release 11.2: dest-mac mac-address, dmac-output-list access-list-number, and linger minutes.
The cost keyword specified in a remote peer statement takes precedence over the cost learned as part of the capabilities exchange with the remote peer. The cost keyword is relevant only in fault tolerance mode.
When you need to permit access to a single MAC address, the dest-mac option is a shortcut over the dmac-output-list option.
The following example specifies an FST peer as backup to a primary TCP peer:
dlsw remote-peer 0 tcp 10.2.18.1 dlsw remote-peer 1 fst 10.2.17.8 backup-peer 10.2.18.1
The following example specifies an FST encapsulation connection for remote peer transport:
dlsw remote-peer 1 fst 10.2.17.8
You can use the master indexes or search online to find documentation of related commands.
Use the dlsw remote-peer interface global configuration command when specifying a point-to-point direct encapsulation connection. Use the no form of this command to disable previous interface assignments.
dlsw remote-peer list-number interface serial number [backup-peer [ip-address | frame-relay
list-number | Ring list number. The valid range is 1 to 255. The default is 0, which means all. |
serial number | Specifies the remote peer by direct serial interface. |
backup-peer ip-address | (Optional) IP address of the existing TCP/FST peer for which this peer is the backup peer. |
backup-peer frame-relay interface serial number dlci number | (Optional) Serial interface and DLCI number of the existing Direct /LLC2 frame-relay peer for which this peer is the backup peer. |
backup-peer interface name | (Optional) Interface name of the existing direct peer for which this peer is the backup peer. |
bytes-netbios-out bytes-list-name | (Optional) Configures NetBIOS bytes output filtering for this peer. The bytes-list-name argument is the name of the previously defined NetBIOS bytes access list filter. |
cost cost | (Optional) Cost to reach this remote peer. The valid range is 1 to 5. |
dest-mac mac-address | (Optional) Permits the connection to be established only when there is an explorer frame destined for the specified 48-bit MAC address written in dotted triplet form. |
dmac-output-list access-list-number | (Optional) Permits the connection to be established only when the explorer frame passes the specified access list. The access-list-number is the list number specified in the access-list command. |
host-netbios-out host-list-name | (Optional) Configures NetBIOS host output filtering for this peer. The host-list-name is the name of the previously defined NetBIOS host access list filter. |
keepalive seconds | (Optional) Sets the keepalive interval for this remote peer. The range is 0 to 1200 seconds. |
lf size | (Optional) Largest frame size, in bytes, this local peer will use on a circuit to avoid segmented frames. Valid sizes are 516, 1470, 1500, 2052, 4472, 8144, 11407, 11454, and 17800 bytes. |
linger minutes | (Optional) Configures length of time the backup peer remains connected after the primary peer connection is reestablished. The valid range is 1 to 300 minutes. The default is 5 minutes. |
lsap-output-list list | (Optional) Filters output IEEE 802.5 encapsulated packets. Valid access list numbers are in the range 200 to 299. |
passive | (Optional) Designates this remote peer as passive. |
pass-thru | (Optional) Selects passthrough mode. The default is local acknowledgment mode. |
No point-to-point direct encapsulation connection is specified.
Global configuration
This command first appeared in Cisco IOS Release 10.3. The following keywords and arguments first appeared in Cisco IOS Release 11.2: dest-mac mac-address, dmac-output-list access-list-number, linger minutes.
The cost keyword specified in a remote peer statement takes precedence over the cost learned as part of the capabilities exchange with the remote peer. The cost keyword is relevant only in fault tolerance mode.
When you need to permit access to a single MAC address only, the dest-mac option is a shortcut over the dmac-output-list option.
The following example specifies a point-to-point direct peer backup to a primary direct peer:
dlsw remote-peer 0 interface serial 1 pass-thru dlsw remote-peer 1 interface serial 2 pass-thru backup-peer interface serial 1
The following example specifies a point-to-point direct encapsulation connection for remote peer transport:
dlsw remote-peer 1 interface serial 2 pass-thru
You can use the master indexes or search online to find documentation of related commands.
Use the dlsw remote-peer tcp global configuration command to identify the IP address of a peer with which to exchange traffic using TCP. Use the no form of this command to remove a remote peer.
dlsw remote-peer list-number tcp ip-address [backup-peer [ip-address | frame-relay
list-number | Remote peer ring group list number. This ring group list number default is 0. Otherwise, this value must match the number you specify with the dlsw ring-list, dlsw port-list or dlsw bgroup-list command. |
tcp ip-address | IP address of the remote peer with which the router is to communicate. |
backup-peer ip-address | (Optional) IP address of the existing TCP/FST peer for which this peer is the backup peer. |
backup-peer frame-relay interface serial number dlci number | (Optional) Serial interface and DLCI number of the existing Direct /LLC2 frame-relay peer for which this peer is the backup peer. |
backup-peer interface name | (Optional) Interface name of the existing direct peer for which this peer is the backup peer. |
bytes-netbios-out bytes-list-name | (Optional) Configures NetBIOS bytes output filtering for this peer. The bytes-list-name argument is the name of the previously defined NetBIOS bytes access list filter. |
cost cost | (Optional) The cost to reach this remote peer. The valid range is 1 to 5. |
dest-mac mac-address | (Optional) Permits the TCP connection to be established only when there is an explorer frame destined for the specified 48-bit MAC address written in dotted triplet form. |
dmac-output-list access-list-number | (Optional) Permits the TCP connection to be established only when the explorer frame passes the specified access list. The access-list-number is the list number specified in an access-list command. |
dynamic | (Optional) Permits the TCP connection to be established only when there is DLSw+ data to send. |
host-netbios-out host-list-name | (Optional) Configures NetBIOS host output filtering for this peer. The host-list-name is the name of the previously defined NetBIOS host access list filter. |
inactivity minutes | (Optional) Configures the length of time a connection can be idle before closing the dynamic remote peer connection. The valid range is 1 to 300 minutes. The default is 5 minutes. |
keepalive seconds | (Required) Sets the keepalive interval for this remote peer. The range is 0 to 1200 seconds. |
lf size | (Optional) Largest frame size, in bytes, this local peer will use on a circuit to avoid segmented frames. Valid sizes are 516, 1470, 1500, 2052, 4472, 8144, 11407, 11454, and 17800 bytes. |
linger minutes | (Optional) Configures length of time the backup peer remains connected after the primary peer connection is reestablished. The valid range is 1 to 300 minutes. The default is 5 minutes. |
lsap-output-list list | (Optional) Filters output IEEE 802.5 encapsulated packets. Valid access list numbers are in the range 200 to 299. |
no-llc minutes | (Optional) Configures the length of time a remote peer remains connected after all LLC2 connections are gone. The valid range is 1 to 300 minutes. The default is 5 minutes. |
passive | (Optional) Designates this remote peer as passive. |
priority | (Optional) Enables prioritization features for this remote peer. Valid TCP port numbers are the following: · High: 2065 · Medium: 1981 · Normal: 1982 · Low: 1983 |
tcp-queue-max size | (Optional) Maximum output TCP queue size for this remote peer. The valid maximum TCP queue size is a number in the range 10 to 2000. |
timeout seconds | (Optional) Configures the retransmit time limit for TCP. The valid range is 5 to 1200 seconds. The default is 90 seconds. |
No peer IP address is identified.
The linger option is inactive. If the linger option is added with no minutes specified, the default is 5 minutes.
The dynamic option is not on by default. If the dynamic option is added without either the inactivity or no-llc argument specified, the default is to terminate the TCP connection to the remote peer after 5 minutes of no active LLC2 connection.
Global configuration
This command first appeared in Cisco IOS Release 10.3. The following keywords and arguments first appeared in Cisco IOS Release 11.1: dynamic, inactivity minutes, linger minutes, no-llc minutes and timeout seconds. The following keywords and arguments first appeared in Cisco IOS Release 11.2: dest-mac mac-address, dmac-output-list access-list-number, linger minutes.
SNA DDR technology allows switched links to be closed during idle periods. To enable this feature, set the keepalive option to 0 and configure the timeout option. When the dynamic option is configured, the keepalive option is automatically set to 0.
To enhance DDR cost-savings, you can configure the TCP connection to a remote peer to be dynamically established (that is, established only when there is DLSw data to send). You can further configure the TCP connection to terminate after a specified period of idle time on the peer or after a specified period of no active LLC sessions on the peer.
You cannot use both no-llc and inactivity in a command specifying a dynamic peer.
When you need to permit access to a single MAC address, the dest-mac option is a shortcut over the dmac-output-list option.
Use the linger option to specify that a backup peer will remain connected for a specified period of time after the primary connection is reestablished.
When the priority option on the dlsw remote-peer command is configured, DLSw+ automatically activates four TCP ports to that remote peer (ports 2065, 1981, 1982 and 1983) and assigns traffic to specific ports. Furthermore, if APPN is running with DLSw+ and you specify the priority option on the dlsw remote-peer command, then the SNA TOS will map APPN class of service (COS) to TCP TOS and will preserve the APPN COS characteristics throughout the network.
The following example specifies a TCP peer as backup to a primary FST peer:
dlsw remote-peer 0 fst 10.2.18.9 dlsw remote-peer 1 tcp 10.2.17.8 backup-peer 10.2.18.9
The following example specifies a TCP encapsulation connection for remote peer transport:
dlsw remote-peer 1 tcp 10.2.17.8
The following is an example policy routing configuration that shows how to modify the default setting of TCP port 2065. The configuration changes the default setting on IP packets from network control precedence to routine precedence.
ip local policy route-map test access-list 101 permit tcp any eq 2065 any access-list 101 permit tcp any any eq 2065 route-map test permit 20 match ip address 101 set ip precedence routine
You can use the master indexes or search online to find documentation of related commands.
Use the dlsw ring-list to configure a ring list, mapping traffic on a local interface to remote peers. Use the no form of this command to cancel the definition.
dlsw ring-list list-number rings ring-number
list-number | Ring list number. The valid range is 1 to 255. |
rings | Specify one or more physical or virtual rings. |
ring-number | Physical or virtual ring number. The valid range is 1 to 4095. |
There is no default setting.
Global configuration
This command first appeared in Cisco IOS Release 11.0.
Traffic received from a remote peer is forwarded only to the rings specified in the ring list. Traffic received from a local interface is forwarded to peers if the input ring number appears in the ring list applied to the remote peer definition. The definition of a ring list is optional.
The following example configures a DLSw ring list, assigning rings 1, 2, and 3 to ring list 3:
dlsw ring-list 3 rings 1 2 3
You can use the master indexes or search online to find documentation of related commands.
dlsw port-list
show dlsw capabilities
dlsw remote-peer frame relay
Use the dlsw timer global configuration command to tune an existing configuration parameter. Use the no form of this command to restore the default parameters.
dlsw timer {icannotreach-block-time | netbios-cache-timeout | netbios-explorer-timeout |
icannotreach-block-time | Cache life of unreachable resource; during this time searches for the resource are blocked. The valid range is 1 to 86400 seconds. The default is 0 (disabled). |
netbios-cache-timeout | Cache life of NetBIOS name location for the local and remote reachability caches. The valid range is 1 to 86400 seconds. The default is 960 seconds (16 minutes). |
netbios-explorer-timeout | Length of time that the Cisco IOS software waits for an explorer response before marking a resource unreachable (on both a LAN and a WAN). The valid range is 1 to 86400 seconds. The default is 6 seconds. |
netbios-group-cache | Cache life of NetBIOS entries in the group cache. The valid range is 1 to 86000 seconds. The default is 240 seconds (4 minutes). |
netbios-retry-interval | NetBIOS explorer retry interval (on a LAN only). The valid range is 1 to 86400 seconds. The default is 1 second. |
netbios-verify-interval | Number of seconds between a cache entry's creation and its marking as stale. If a search request comes in for a stale cache entry, a directed verify query is sent to ensure the cache still exists. The valid range is 1 to 86400 seconds. The default is 240 seconds (4 minutes). |
sna-cache-timeout | Length of time that an SNA MAC/service access point (SAP) location cache entry exists before it is discarded (for local and remote caches). The valid range is 1 to 86400 seconds. The default is 960 seconds (16 minutes). |
explorer-delay-time | Time to wait before sending or accepting explorers. The valid range is 1 to 5 minutes. The default is 0. |
sna-group-cache | Cache life of SNA entries in the group cache. The valid range is 1 to 86000 seconds. The default is 240 seconds (4 minutes). |
sna-explorer-timeout | Length of time that the Cisco IOS software waits for an explorer response before marking a resource unreachable (on a LAN and WAN). The valid range is 1 to 86400 seconds. The default is 180 seconds (3 minutes). |
explorer-wait-time | Time to wait for all stations to respond to explorers. The valid range is 1 to 86400 seconds. The default is 0. |
sna-retry-interval | Interval between SNA explorer retries (on a LAN). The valid range is 1 to 86400 seconds. The default is 30 seconds. |
sna-verify-interval | Number of seconds between a cache entry's creation and its marking as stale. If a search request comes in for a stale cache entry, a directed verify query is sent to ensure that the cache still exists. The valid range is 1 to 86400 seconds. The default is 240 seconds (4 minutes). |
Global configuration
This command first appeared in Cisco IOS Release 10.3.
The netbios-group-cache and sna-group-cache options were added to this command for the Border Peer Caching feature.
The following configuration defines the length of time that an entry will stay in the group cache as 120 seconds (2 minutes):
dlsw timers sna-group-cache 120
The following example configures the length of time that an SNA MAC location cache entry exists before it is discarded:
dlsw timer sna-cache-timeout 3
Use the dlsw udp-disable global configuration command to disable the UDP Unicast feature. Use the no form of this command to return to the default UDP Unicast feature.
dlsw udp-disableThis command has no arguments or keywords.
The UDP Unicast feature is enabled.
Global configuration
This command first appeared in Cisco IOS Release 11.2 F.
If the dlsw udp-disable command is configured, then a DLSw+ node will not send packets via UDP Unicast and will not advertise UDP Unicast support in its capabilities exchange message.
Refer to the "Bridging and IBM Networking Overview" chapter of the Bridging and IBM Networking Configuration Guide for more information on the UDP Unicast feature.
The following example disables the UDP Unicast feature:
dlsw udp-disable
Use the qllc dlsw interface configuration command to enable DLSw+ over Qualified Logical Link Control (QLLC). Use the no form of this command to cancel the configuration.
qllc dlsw {subaddress subaddress | pvc pvc-low [pvc-high]} [vmac vmacaddr
subaddress subaddress | An X.121 subaddress. |
pvc | Map one or more permanent virtual circuits (PVCs) to a particular QLLC service (in this case DLSw+). QLLC will attempt to reach the partner by sending and ID.STN.IND to DLSw+. |
pvc-low | Lowest logical channel number (LCN) for a range of X.25 PVCs. Acceptable values for PVCs are decimal numbers between 1 and 4095. There is no default value. |
pvc-high | (Optional) Highest LCN. If not specified the range of PVCs consists of just one PVC. |
vmac vmacaddr | (Optional) Defines either the only virtual MAC address used for DLSw+ or the lowest virtual MAC address in a pool of virtual MAC addresses. |
poolsize | (Optional) Specify the number of contiguous virtual MAC addresses that have been reserved for DLSw+. If the parameter is not present, then just one virtual MAC address is available. |
partner partner-macaddr | Virtual MAC address to which an incoming call wishes to connect. The qllc dlsw command must be repeated for each different partner. Each partner is identified by a unique subaddress. |
sap ssap dsap | Overrides the default SAP values (04) for a Token Ring connection. dsap refers to the partner's SAP address; ssap applies to the virtual MAC address that corresponds to the X.121 device. |
xid xidstring | XID format 0 type 2 string. |
npsi-poll | Inhibits forwarding a null XID on the X.25 link. Instead the Cisco IOS software will send a null XID response back to the device that sent the null XID command. |
No defaults are specified.
Interface configuration
This command first appeared in Cisco IOS Release 11.0.
Any incoming call whose X.121 destination address matches the router's X.121 address and this subaddress will be dispatched to DLSw+ (with an ID.STN IND). If a router is providing several QLLC services different subaddresses must be used to discriminate between them. Subaddresses can be used even if a remote X.25 device is not explicitly mapped to a specific virtual MAC address. This is most useful when PU 2.1 devices are connecting to a host because the X.25 device's control point name and network name are used to validate the connection, rather than some virtual MAC address. The subaddress is optional. If no subaddress is provided, any incoming call that matches the router's X.121 address will be dispatched to DLSw+. On outgoing calls the subaddress is concatenated to the interface's X.121 address.
When DLSw+ receives a Can You Reach inquiry about a virtual MAC address in the pool, the QLLC code will attempt to set up a virtual circuit to the X.121 address that maps to the virtual MAC address specified. If an incoming call is received, QLLC sends an ID.STN.IND with a virtual MAC address from the pool to DLSw+. If there is no virtual MAC address, then the x25 map qllc or x25 pvc qllc command must provide a virtual MAC address.
The npsi-poll parameter is needed to support PU 2.0 on the partner side that wishes to connect to a FEP on the X.25 side. In a Token Ring or DLSw+ environment the PU 2.0 will send a null XID to the FEP. If the software forwards this null XID to an X.25 attached FEP the FEP will assume that it is connecting to PU2.1, and will break off the connection when the PU 2.0 next send an XID Format 0 Type 2.
The following commands assign virtual MAC address 1000.0000.0001 to a remote X.25-attached 3174, which is then mapped to the X.121 address of the 3174 (31104150101) in an X.25-attached router:
interface serial 0 x25 address 3110212011 x25 map qllc 1000.000.0001 31104150101 qllc dlsw partner 4000.1161.1234
Use the sdlc dlsw interface configuration command to attach SDLC addresses to DLSw+. Use the no form of this command to cancel the configuration.
sdlc dlsw {sdlc-address | default | partner mac address [inbound | outbound]}
sdlc-address | SDLC address in hexadecimal. The valid range is 1 to FE. |
default | Allows the user to configure an unlimited number of SDLC addresses to DLSw+. |
partner mac address | MAC address for default partner |
inbound | Partner will initiate connection. |
outbound | Initiate connection to partner. |
No correspondence is defined.
Interface configuration
This command first appeared in Cisco IOS Release 11.0.
The following command attaches SDLC address d2 to DLSw+:
sdlc dlsw d2
The following command attaches SDLC addresses d2, d5, e3, e4, e6, b1, c3, d4, a1 and a5:
sdlc dlsw d2 d5 e3 e4 e6 b1 c3 d4 a1 a5
You can use the master indexes or search online to find documentation of related commands.
encapsulation sdlc
sdlc address
sdlc role
Use the show dlsw capabilities privileged EXEC command to display the configuration of a specific peer or all peers.
show dlsw capabilities [interface type number | ip-address ip-address | local]
interface | (Optional) Specifies the interface for which the DLSw+ capabilities are to be displayed. |
type | Interface type is indicated by the keyword serial. |
number | Interface number. |
ip-address ip-address | (Optional) Specifies a peer by its IP address. |
local | (Optional) Specifies the local DLSw+ peer. |
Privileged EXEC
This command first appeared in Cisco IOS Release 10.3.
The following is sample output from the show dlsw capabilities command:
Router# show dlsw capabilities DLSw: Capabilities for peer 1.1.1.6(2065) vendor id (OUI) : '00C' (cisco) version number : 1 release number : 0 init pacing window : 20 unsupported saps : none num of tcp sessions : 1 loop prevent support : no icanreach mac-exclusive : no icanreach netbios-excl. : no reachable mac addresses : none reachable netbios names : none cisco version number : 1 peer group number : 0 border peer capable : no peer cost : 3 biu-segment configured : no UDP Unicast support : yes local-ack configured : yes priority configured : no configured ip address : 1.1.1.6 peer type : conf version string :
Table 28 describes significant fields shown from the show dlsw capabilities command.
| Field | Description |
|---|---|
vendor id (OUI) | Vendor ID. |
version number | RFC 1795 version of SSP protocol. |
release number | RFC 1795 release of SSP protocol |
init pacing window | Initial pacing window. |
unsupported saps | Unsupported SAPs. |
num of tcp sessions | Number of TCP sessions. |
loop prevent support | No loop prevent support. |
icanreach mac-exclusive | Configured MAC addresses that the router can reach |
icanreach netbios-excl. | Configured NetBIOS names that the router can reach |
reachable mac addresses | Reachable MAC addresses. |
reachable netbios name | Reachable NetBIOS names. |
cisco version number | Cisco version number. |
peer group number | Peer group member number. |
border peer capable | Border peer capability. |
peer cost | Peer cost. |
biu-segment configured | BIU segment configured. |
UDP Unicast support | UDP unicast support. |
local-ack configured | Local acknowledgment capable. |
priority configured | Priority capability. |
configured ip address | Configured IP address. |
peer type | Peer type can be peer-on-demand or promiscuous. |
version string | Cisco IOS software version information. |
Use the show dlsw circuits privileged EXEC command to display the state of all circuits involving this MAC address as a source and destination.
show dlsw circuits [detail] [mac-address address | sap-value value | circuit id]
detail | (Optional) Display circuit state information in expanded format. |
mac-address address | (Optional) Specifies the MAC address to be used in the circuit search. |
sap-value value | (Optional) Specifies the SAP to be used in the circuit search. |
circuit id | (Optional) Specifies the circuit ID of the circuit index. |
Privileged EXEC
This command first appeared in Cisco IOS Release 10.3.
The following is sample output from the show dlsw circuits command:
Router# show dlsw circuits Index local addr(lsap) remote addr(dsap) state uptime 4060086272 4000.0000.0056(F0) 4001.0000.0049(F0) CONNECTED 00:00:13 Total number of circuits connected: 1
The following is sample output from the show dlsw circuits command with the detail argument:
Router# show dlsw circuits detail Index local addr(lsap) remote addr(dsap) state uptime 194 0800.5a9b.b3b2(F0) 800.5ac1.302d(F0) CONNECTED 00:00:13 PCEP: 995AA4 UCEP: A52274 Port: To0/0 peer 172.18.15.166(2065) Flow-Control-Tx SQ CW:20, Permitted:28; Rx CW:22, Granted:25 Op: IWO Congestion: LOW(02), Flow Op: Half: 12/5 Reset 1/0 RIF = 0680.0011.0640
Table 29 describes significant fields shown in the display.
| Field | Description |
|---|---|
Index | Index = 4D00 |
local addr (lsap) | Local Address (LSAP) = 4006.313c.a07f (F0) |
remote addr (dsap) | Remote Address (DSAP) = 0800.5a8f.8822 |
state | Connected |
uptime | length of time a circuit has been in session |
total number of circuits connected | total number of connected circuits |
Use the show dlsw fastcache privileged EXEC command to display the fast cache for FST and direct-encapsulated peers.
show dlsw fastcacheThis command has no arguments or keywords.
Privileged EXEC
This command first appeared in Cisco IOS Release 11.0.
The following is sample output from the show dlsw fastcache command with an FST peer:
Router# show dlsw fastcache
peer local-mac remote-mac l/r sap rif
FST 10.2.32.1 0800.5a8f.881c 0800.5a8f.8822 04/04 0680.02D5.1360
The following is sample output from the show dlsw fastcache command:
Router# show dlsw fastcache
peer local-mac remote-mac l/r sap rif
IF Se1 0800.5a8f.881c 0800.5a8f.8822 F0/F0 0680.02D5.1360
Table 30 describes significant fields shown in the display.
| Field | Description |
|---|---|
peer | The FST peer in which the router is connected. Could represent either an ip address or interface. |
local-mac | Local MAC address |
remote-mac | Remote MAC address |
l/r sap | Local/remote SAP value. |
rif | RIF value. |
Use the show dlsw peers privileged EXEC command to display DLSw peer information.
show dlsw peers [interface type number | ip-address ip-address | udp]
interface | (Optional) Specifies the interface for which the DLSw+ peer information is to be displayed. |
type | Interface type, indicated by the keyword serial. |
number | Interface number. |
ip-address ip-address | (Optional) Specifies a remote peer by its IP address. |
udp | (Optional) Specifies a remote peer by its UDP capabilities. |
Privileged EXEC
This command first appeared in Cisco IOS Release 11.0.
The following is sample output from the show dlsw peers command:
Router# show dlsw peers udp Peers: tot-Q'd total-rx total-tx tot-retx tot-drop curr-Q'd TCP uptime 1.1.1. 6 0 23 0 0 0 0 0 00:01:02 Total number of connected peers: 2 Total number of connections: 8
The following is sample output from the show dlsw peers command with a TCP connection:
Router# show dlsw peers
Peers: state pkts_rx pkts_tx type drops ckts TCP uptime
TCP 1.1.91.1
High priority CONNECT 43 40 conf 0 1 0 00:01:02
Medium priority CONNECT 0 0 conf 0 - 0 00:01:02
Normal priority CONNECT 4 41 conf 0 - 5 00:01:02
Low priority CONNECT 1 0 conf 0 - 0 00:01:02
TCP 1.1.93.1
High priority CONNECT 3 3 conf 0 0 0 00:00:58
Medium priority CONNECT 0 0 conf 0 - 0 00:00:58
Normal priority CONNECT 0 0 conf 0 - 0 00:00:58
Low priority CONNECT 0 39 conf 0 - 0 00:00:58
Total number of connected peers: 2
Total number of connections: 8
The following is sample output from the show dlsw peers command with a Direct Frame Relay connection:
Router # show dlsw peers Peers: state pkts_rx pkts_tx type drops ckts TCP uptime IF SE1 16connect 652 597 conf 0 - - 00:04:09 Total number of connected peers: 2 Total number of connections: 8
The following is sample output from the show dlsw peers command with a Direct Frame Relay with local acknowledgment (LLC2) connection:
Router # show dlsw peers Peers: state pkts_rx pkts_tx type drops ckts TCP uptime LLC2 SE1 16connect 1179 108 conf 0 1 - 00:04:09 Total number of connected peers: 2 Total number of connections: 8
Table 31 describes the significant fields shown in the show dlsw peers command display.
| Field | Description |
|---|---|
Peers | Information related to the remote peer, including encapsulation type, IP address (if using FST or TCP), and interface number (if using direct encapsulation). |
tot-Q'd | Number of UDP packets that have been queued because of TCP congestion. |
total-rx | Number UDP packets received from the peer. |
total-tx | Number of UDP packets transmitted to the peer. |
tot-retx | Number of reachability retransmits (for example, DLSw+ retries NQ_ex and CUR_ex) when originally sent via UDP. |
tot-drop | Number of queued UDP packets that were dropped because of persistent TCP congestion. |
curr-Q'd | Number of current UDP packets queued because of TCP congestion. |
TCP | Number of packets currently on TCP output queue. |
state | State of the peer: |
pkts_rx | Number of received packets. |
pkts_tx | Number of transmitted packets. |
type | Type of remote peer: conf : configured |
drops | The number of drops done by this peer. Reasons for the counter to increment:
|
uptime | How long the connection has been established to this peer. |
ckts | Number of active circuits through this peer. This field applies only to TCP and LLC2 transport peer types. |
total number of connected peers | ltotal number of currently connected peers |
total number of connections | ltotal number of active cicuit connections |
Use the show dlsw reachability privileged EXEC command to display DLSw reachability information.
show dlsw reachability [[group [value] | local | remote] | [mac-address [address]
group | (Optional) Displays contents of group reachability cache only. |
value | (Optional) Specifies the group number for the reachability check. Only displays group cache entries for the specified group. The valid range is 1 to 255. |
local | (Optional) Displays contents of local reachabilty cache only. |
remote | (Optional) Displays contents of remote reachabilty cache only. |
mac-address | (Optional) Displays DLSw reachability for MAC addresses only. |
address | (Optional) Specifies the MAC address for which to search in the reachability cache. |
netbios-names | (Optional) Displays DLSw reachability for NetBIOS names only. |
name | (Optional) Specifies the NetBIOS name for which to search in the reachability cache. |
Privileged EXEC
This command first appeared in Cisco IOS Release 11.0.
If none of the group, local, or remote options are specified, then the caches will be displayed in the following order: local, remote, and group.
The following is sample output from the show dlsw reachability group command:
router# show dlsw reachability group DLSw Group MAC address reachability cache list Mac Addr Group 0000.3072.1070 10 DLSW Group NetBIOS Name reachability cache list NetBIOS Name Group
The following is sample output from the show dlsw reachability command:
Router# show dlsw reachability DLSw MAC address reachability cache list Mac Addr status Loc. peer/port rif 0000.f641.91e8 SEARCHING LOCAL 0006.7c9a.7a48 FOUND LOCAL TokenRing0/0 0CB0.0011.3E71.A041.0DE5.0640 0800.5a4b.1cbc SEARCHING LOCAL 0800.5a54.ee59 SEARCHING LOCAL 0800.5a8f.9c3f FOUND LOCAL TokenRing0/0 08B0.A041.0DE5.0640 4000.0000.0050 FOUND LOCAL TokenRing0/0 0CB0.0011.3E71.A041.0DE5.0640 4000.0000.0306 FOUND LOCAL TokenRing0/0 0CB0.0011.3E71.A041.0DE5.0640 4000.0000.0307 SEARCHING LOCAL 4000.0000.0308 SEARCHING LOCAL 4000.1234.56c1 FOUND LOCAL Serial3/7 --no rif-- 4000.1234.56c2 FOUND LOCAL Serial3/7 --no rif-- 4000.3000.0100 FOUND LOCAL TokenRing0/0 08B0.A041.0DE5.0640 4000.4000.ff40 SEARCHING LOCAL 4000.7470.00e7 SEARCHING LOCAL 4000.ac0b.0001 FOUND LOCAL TokenRing0/0 08B0.A041.0DE5.0640 4001.0000.0064 FOUND LOCAL TokenRing0/0 0CB0.0011.3E71.A041.0DE5.0640 4001.3745.1088 FOUND LOCAL TokenRing0/0 08B0.A041.0DE5.0640 4100.0131.1030 FOUND LOCAL TokenRing0/0 10B0.FFF1.4041.0041.3E71.A041.0DE5.0640 DLSw NetBIOS Name reachability cache list NetBIOS Name status Loc. peer/port rif APPNCLT2 FOUND LOCAL TokenRing0/0 08B0.A041.0DE5.0640
The following is sample output from the show dlsw reachability command with the mac-address argument:
Router# show dlsw reachability mac-address 4000.00000306 DLSw MAC address reachability cache list Mac Addr status Loc. peer/port rif 4000.0000.0306 FOUND LOCAL TokenRing0/0 0CB0.0011.3E71.A041.0DE5.0640
The following is sample output from the show dlsw reachability command with the netbios-names argument:
Router# show dlsw reachability netbios-names DLSw NetBIOS Name reachability cache list NetBIOS Name status Loc. peer/port rif APPNCLT2 FOUND LOCAL TokenRing0/0 08B0.A041.0DE5.0640
Table 32 describes the significant fields shown in the show dlsw reachability command.
| Field | Description |
|---|---|
Mac Addr | MAC address of station being sought (destination MAC address of canureach_ex packet). |
NetBIOS Name | NetBIOS name of station being sought (destination MAC address of NQ_ex packet). |
status | Result of station search. The status can be one of the following:
|
Loc. | Location of station. LOCAL indicates that the station is on the local network. REMOTE indicates that the station is on the remote network. |
peer/port | Peer/port number. If the Loc. field lists a REMOTE station, the peer/port field indicates the peer through which the remote station is reachable. If the Loc. field lists a LOCAL station, the peer/port field indicates the port through which the local station is reachable. For ports, the port number and slot number are given. Pxxx-Syyy denotes port xxx slot yyy. If the station is reachable through a bridge group, that is shown by TBridge-xxx. |
rif | Shows the RIF in the cache. This column applies only to LOCAL stations. If the station was reached through a medium that does not support RIFs (such as SDLC or Ethernet) then "--no rif--" is shown. |
Use the show dlsw statistics privileged EXEC command to display the number of frames that have been processed in the local, remote, and group cache.
show dlsw statistics [border-peers]
border-peers | (Optional) Displays the number of frames processed in the local, remote, and group caches. |
Privileged EXEC
This command first appeared in Cisco IOS Release 11.2 F.
The following sample displays the number of frames processed in the local, remote, and group cache:
router# show dlsw statistics border-peers
100 Border Peer Frames processed
10 Border frames found Local
20 Border frames found Remote
17 Border frames found Group Cache
Posted: Tue Aug 22 11:10:09 PDT 2000
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