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To enter the address family submode for configuring routing protocols, such as BGP, RIP and static routing, use the address-family command in address family configuration submode. To disable the address family submode for configuring routing protocols, use the no form of this command.
VPN-IPv4 unicast
address-family vpnv4 [unicast]
no address-family vpnv4 [unicast]
IPv4 unicast
address-family ipv4 [unicast]
no address-family ipv4 [unicast]
IPv4 unicast with CE router
address-family ipv4 [unicast] vrf vrf-name
no address-family ipv4 [unicast] vrf vrf-name
Syntax Description
ipv4 Configures sessions that carry standard IPv4 address prefixes. vpnv4 Configures sessions that carry customer VPN-IPv4 prefixes, each of which has been made globally unique by adding an 8-byte route distinguisher. unicast (Optional) Specifies unicast prefixes. vrf vrf-name Specifies the name of a VPN routing/forwarding instance (VRF) to associate with submode commands.
Defaults
Routing information for address family IPv4 is advertised by default when you configure a BGP session using the neighbor...remote-as command unless you execute the no bgp default ipv4-activate command.
Command Modes
Address family configuration submode
Command History
12.0(5)T This command was introduced.
Release
Modification
Usage Guidelines
Using the address-family command puts you in address family configuration submode (prompt: (config-router-af)# ). Within this submode, you can configure address-family specific parameters for routing protocols, such as BGP, that can accommodate multiple Layer 3 address families.
To leave address family configuration submode and return to router configuration mode, type exit-address-family, or simply exit.
Examples
The address-family command in the following example puts the router into address family configuration submode for the VPNv4 address family. Within the submode, you can configure advertisement of NLRI for the VPNv4 address family using neighbor activate and other related commands:
router bgp 100 address-family vpnv4
The command in the following example puts the router into address family configuration submode for the IPv4 address family. Use this form of the command, which specifies a VRF, only to configure routing exchanges between PE and CE devices. This address-family command causes subsequent commands entered in the submode to be executed in the context of VRF vrf2. Within the submode, you can use neighbor activate and other related commands to accomplish the following:
Entered the address family submode as follows:
router bgp 100 address-family ipv4 unicast vrf vrf2
Related Commands
Exits from the address family submode. Enables the exchange of information with a neighboring router.
Command
Description
To insert a path entry after a specific index number, use the append-after command in IP explicit path subcommand mode.
append-after index command
Syntax Description
index Previous index number. Valid range is 0 to 65534. command One of the IP explicit path configuration commands that create a path entry. (Currently, only the next-address command can be used.)
Defaults
No default behavior or values.
Command Modes
IP explicit path subcommand
Command History
12.0(5)S This command was introduced.
Release
Modification
Examples
The following command inserts the next-address subcommand after the specific index:
append-after 5 next-address 3.3.27.3
Related Commands
index Inserts or modifies a path entry at a specific index. ip explicit-path Enters the subcommand mode for IP explicit paths to create or modify the named path. list Displays all or part of the explicit path or paths. next-address Specifies the next IP address in the explicit path. show ip explicit-paths Displays configured IP explicit paths.
Command
Description
To override the control ATM address of an MPC or MPS, use the atm-address command in interface configuration mode. Use the no form of this command to revert to the default address.
atm-address atm-address
Syntax Description
atm-address Control ATM address.
Defaults
The default is an auto-generated ATM address.
Command Modes
Interface configuration
Command History
11.3(3a)WA4(5) This command was introduced.
Release
Modification
Usage Guidelines
This command specifies the control ATM address that an MPC or MPS should use when it comes up; that is, when it is associated with a hardware interface.
The atm-address command overrides the default operational control address of the MPC or MPS. When this address is deleted (using the no form of the command), the MPC or MPS uses an auto-generated address as its control address.
Examples
The following example specifies the ATM address for an MPC:
atm-address 47.0091810000000061705b7701.00400BFF0011.00
The following example specifies the ATM address for an MPS:
atm-address 47.0091810000000061705C2B01.00E034553024.00
To configure scanning intervals of BGP routers to decrease import processing time of VPNv4 routing information, use the bgp scan-time command in router configuration mode. To disable the scanning interval of a router, use the no form of this command.
bgp scan-time [import] scanner-interval
Syntax Description
import (Optional) Configures import processing of VPNv4 unicast routing information from BGP routers into routing tables. scanner-interval Specifies the scanning interval of BGP routing information. Valid values used for selecting the desired scanning interval are from
5 to 60 seconds.
Defaults
The default scanning interval is 60 seconds.
Command Modes
Router configuration
Command History
12.07(T) This command was introduced.
Release
Modification
Examples
In the following example, the scanning interval for next-hop validation of IPv4 unicast routes for BGP routing tables is set to 20 seconds:
router bgp 100 bgp scan-time 20
In the following example, the scanning interval for next-hop validation of address family VPNv4 unicast routes for BGP routing tables is set to 45 seconds:
router bgp 150 bgp scan-time import 45
In the following example, the scanning interval for importing address family VPNv4 routes into IP routing tables is set to 30 seconds:
router bgp 200 address-family vpnv4 unicast bgp scan-time 30
Related Commands
address-family Enters the address-family command submode used to configure routing protocols, including RIP, BGP, and static routing.
Command
Description
To configure aggregation cache operational parameters, use the cache command in aggregation cache configuration mode.
To disable the operational parameters, use the no form of this command.
cache {entries number | timeout [active minutes | inactive seconds]}
Syntax Description
entries number The number of cached entries allowed in the aggregation cache. The number of entries can be 1024 to 524288. The default is 4096. active minutes (Optional) The number of minutes that an active entry is active. The default is 30 minutes; the range is from 1 to 60 minutes. inactive seconds (Optional) The number of seconds that an inactive entry will stay in the aggregation cache before it times out. The default is 15 seconds; the range is from 10 to 600 seconds.
Defaults
The default for cache entries is 4096.
The default for active cache entries is 30 minutes.
The default for inactive cache entries is 15 seconds.
Command Modes
Aggregation cache configuration
Command History
12.0(3)T This command was introduced.
Release
Modification
Examples
The following example shows how to set the aggregation cache entry limits:
cache entries 2046cache timeout inactive 199
Related Commands
Command Description Enables an aggregation cache. Enables the exporting of information from NetFlow aggregation caches. Enables aggregation cache configuration mode. Displays the aggregation cache configuration. Displays the statistics for the data export, including the main cache and all other enabled caches.
To configure a defined MPLS CoS map which specifies how classes map to label VCs (LVCs) when combined with a prefix map, use the class command in CoS map submode. To disable this option, use the no form of this command.
class class [available standard premium control]
Syntax Description
class The precedence of identified traffic to classify traffic. available (Optional) Means low precedence (In/Out plus lower two bits = 0,4). standard (Optional) Means next precedence (In/Out plus lower two bits = 1,5). premium (Optional) Means high precedence (In/Out plus lower two bits = 2,6). control (Optional) Means highest precedence pair (In/Out plus lower two bits = 3,7). These bits are reserved for control traffic.
Defaults
No default behavior or values.
Command Modes
CoS map submode
Command History
12.0(5)T This command was introduced.
Release
Modification
Examples
The following commands configure a CoS map:
tag-switching cos-map 55 class 1 premium exit
Related Commands
tag-switching cos-map Creates a class map that specifies how classes map to LVCs when combined with a prefix map. show tag-switching cos-map Displays the CoS map used to assign quantity of label virtual circuits and associated CoS of those LVCs. tag-switching prefix-map Displays the prefix map used to assign a CoS map to network prefixes matching a standard IP access list. access-list Configures the access list mechanism for filtering frames by protocol type or vendor code.
Command
Description
To clear the Cisco Express Forwarding (CEF) adjacency table, use the clear adjacency command in EXEC mode.
clear adjacencySyntax Description
This command has no arguments or keywords.
Command Modes
EXEC
Command History
11.2 GS This command was introduced to support the Cisco 12012 Gigabit Switch Router. 11.1 CC Multiple platform support was added.
Release
Modification
Usage Guidelines
When you issue this command, entries in the adjacency table that resides on the route processor are removed and then repopulated. During repopulation, Layer 2 next hop information is reevaluated.
With Distributed CEF (dCEF) mode, the adjacency tables that reside on line cards are always synchronized to the adjacency table that resides on the route processor. Therefore, clearing the adjacency table on the route processor using the clear adjacency command also clears the adjacency tables on the line cards; all changes are propagated to the line cards.
Examples
The following example clears the adjacency table:
clear adjacency
Related Commands
show adjacency Displays CEF adjacency table information.
Command
Description
To release a specified switched virtual circuit (SVC), use the clear atm vc command in EXEC mode.
clear atm vc vcd
Syntax Description
vcd Virtual channel descriptor of the channel to be released.
Command Modes
EXEC
Command History
11.0 This command was introduced.
Release
Modification
Usage Guidelines
For multicast or control VCCs, this command causes the LANE client to exit and rejoin an emulated LAN.
For data VCCs, this command also removes the associated LANE Address Resolution Protocol (LE ARP) table entries.
Examples
The following example releases SVC 1024:
clear atm vc 1024
To clear Cisco Express Forwarding (CEF) information from line cards, use the clear cef linecard command in EXEC mode.
clear cef linecard [slot-number] [adjacency | interface | prefix]
Syntax Description
slot-number (Optional) Line card slot number to clear. When you omit this argument, all line card slots are cleared. adjacency (Optional) Clears line card adjacency tables and rebuilds adjacency for the specified line card. interface (Optional) Clears line card interface information and recreates the interface information for the specified line card. prefix (Optional) Clears line card prefix tables and starts rebuilding the FIB table.
Command Modes
EXEC
Command History
11.2 GS This command was introduced to support the Cisco 12012 Gigabit Switch Router. 11.1 CC Multiple platform support was added.
Release
Modification
Usage Guidelines
This command is available only on routers with line cards. This command clears CEF information only on the line cards; CEF information on the route processor is not affected.
Once you clear CEF information from line cards, the corresponding information from the route processor is propagated to the line cards. Inter Process Communication (IPC) ensures that CEF information on the route processor matches the CEF information on the line cards.
Examples
The following example clears the CEF information from the line cards:
clear cef linecard
Related Commands
Displays CEF-related interface information by line card.
Command
Description
To clear Cisco Express Forwarding (CEF) counters by resetting the packet and byte count to zero (0), use the clear ip cef prefix-statistics command in EXEC mode.
clear ip cef {network [mask] | *} prefix-statistics
Syntax Description
network Clears counters for a FIB entry specified by network. mask (Optional) Clears counters for a FIB entry specified by network and mask. * Clears counters for all FIB entries.
Command Modes
EXEC
Command History
11.2 GS This command was introduced to support the Cisco 12012 Gigabit Switch Router. 11.1 CC Multiple platform support was added.
Release
Modification
Examples
The following example resets the CEF packet and byte count to zero:
clear ip cef prefix-statistics
Related Commands
show adjacency Displays CEF adjacency table information. show ip cef Displays entries in the FIB that are unresolved or displays a FIB summary.
Command
Description
To clear the NetFlow switching statistics, use the clear ip flow stats command in EXEC mode.
clear ip flow statsSyntax Description
This command has no arguments or keywords.
Command Modes
EXEC
Command History
11.1 CA This command was introduced.
Release
Modification
Usage Guidelines
The show ip cache flow command displays the NetFlow switching statistics. Use the clear ip flow stats command to clear the NetFlow switching statistics.
Examples
The following example clears the NetFlow switching statistics on the router:
clear ip flow stats
Related Commands
Displays the routing table cache used to fast-switch IP traffic.
Command
Description
To clear all routes from a line card's MFIB table and resynchronize it with the RP, use the clear ip mds forwarding command in EXEC mode.
clear ip mds forwardingSyntax Description
This command has no arguments or keywords.
Command Modes
EXEC
Command History
11.2(11)GS This command was introduced.
Release
Modification
Usage Guidelines
Use this command on a line card of a Cisco 7500 or Cisco 12000.
Examples
The following example clears the line card's MFIB table:
clear ip mds forwarding
Related Commands
Clears all line card counts or packet counts.
Command
Description
To delete entries from the IP multicast routing table, use the clear ip mroute command in EXEC mode.
clear ip mroute {* | group [source]}
Syntax Description
* Deletes all entries from the IP multicast routing table. group Can be either one of the following: source (Optional) If you specify a group name or address, you can also specify a name or address of a multicast source that is sending to the group. A source need not be a member of the group.
Command Modes
EXEC
Command History
10.0 This command was introduced. 12.0(5) T The effect of this command was modified. If IP multicast Multilayer Switching (MLS) is enabled, using this command now clears both the multicast routing table on the MMLS-RP and all multicast MLS cache entries for all MMLS-SEs that are performing multicast MLS for the MMLS-RP. That is, the original clearing occurs, and the derived hardware switching table is also cleared.
Release
Modification
Examples
The following example deletes all entries from the IP multicast routing table:
clear ip mroute *
The following example deletes from the IP multicast routing table all sources on the 10.3.0.0 subnet that are sending to the multicast group 224.2.205.42. Note that this example deletes all sources on network 10.3, not individual sources.
clear ip mroute 224.2.205.42 10.3.0.0
Related Commands
ip host Defines a static host name-to-address mapping in the host cache. Enables IP multicast Multilayer Switching (hardware switching) on an external or internal router in conjunction with Layer 3 switching hardware for the Catalyst 5000 switch. show ip mroute Displays the contents of the IP multicast routing table.
Command
Description
To clear all line card counts or packet counts, use the clear ip pim interface count command in EXEC mode.
clear ip pim interface countSyntax Description
This command has no arguments or keywords.
Command Modes
EXEC
Command History
11.2(11)GS This command was introduced.
Release
Modification
Usage Guidelines
Use this command on an RP to delete all multicast distributed switching (MDS) statistics for the entire router.
Examples
The following example clears all the line card packets counts:
clear ip pim interface count
Related Commands
Clears all routes from the MFIB table of a line card and resynchronizes it with the RP.
Command
Description
To remove routes from the VRF routing table, use the clear ip route vrf command in EXEC mode.
clear ip route vrf vrf-name {* | network [mask]}
Syntax Description
vrf-name Name of the VPN routing/forwarding instance (VRF) for the static route. * Deletes all routes for a given VRF. network Destination to be removed, in dotted-decimal format. mask (Optional) Mask for the specified network destination, in dotted-decimal format.
Defaults
No default behavior or values.
Command Modes
EXEC
Command History
12.0(5)T This command was introduced.
Release
Modification
Usage Guidelines
Use this command to clear routes from the routing table. Use the asterisk (*) to delete all routes from the forwarding table for a specified VRF, or enter the address and mask of a particular network to delete the route to that network.
Examples
The following command removes the route to the network 10.13.0.0 in the vpn1 routing table:
clear ip route vrf vpn1 10.13.0.0
Related Commands
Displays the IP routing table associated with a VRF.
Command
Description
To clear the dynamic LANE Address Resolution Protocol (LE ARP) table or a single LE ARP entry of the LANE client configured on the specified subinterface or emulated LAN, use the clear lane le-arp command in EXEC mode.
 |
Note MAC addresses are written in the same dotted notation for the clear lane le-arp command as they are for the global IP arp command. |
To force a LANE server to drop a client and allow the LANE configuration server to assign the client to another emulated LAN, use the clear lane server command in EXEC mode.
Cisco 7500 Series Cisco 4500 and 4700 Routers
Syntax Description
interface slot/port[.subinterface-number] Interface or subinterface where the LANE server is configured for the Cisco 7500 series. The space between the interface keyword and the slot argument is optional. interface number[.subinterface-number] Interface or subinterface where the LANE server is configured for the Cisco 4500 or 4700 routers. The space between the interface keyword and the number argument is optional. name elan-name Name of the emulated LAN on which the LANE server is configured. Maximum length is 32 characters. mac-address mac-address (Optional) Keyword and MAC address of LANE client. client-atm-address atm-address (Optional) Keyword and ATM address of LANE client. lecid lane-client-id (Optional) Keyword and LANE client ID. The LANE client ID is a value from 1 to 4096. route-desc segment segment-number (Optional) Keywords and LANE segment number. The segment number ranges from 1 to 4095. bridge bridge-number (Optional) Keyword and bridge number that is contained in the route descriptor. The bridge number ranges from 1 to 15.
Command Modes
EXEC
Command History
11.0 This command was introduced.
Usage Guidelines
After changing the bindings on the configuration server, use this command on the LANE server to force the client to leave one emulated LAN. The LANE server will drop the Control Direct and Control Distribute VCCs to the LANE client. The client will then ask the LANE configuration server for the location of the LANE server of the emulated LAN it should join. If no LANE client is specified, all LANE clients attached to the LANE server are dropped.
Examples
The following example forces all the LANE clients on the emulated LAN red to be dropped. The next time they try to join, they will be forced to join a different emulated LAN.
Related Commands
client-atm-address name Adds a LANE client address entry to the configuration database of the configuration server. lane database Creates a named configuration database that can be associated with a configuration server. mac-address Sets the MAC layer address of the Cisco Token Ring. show lane server Displays global information for the LANE server configured on an interface, on any of its subinterfaces, on a specified subinterface, or on an ELAN. To clear the ingress and egress cache entries of one or all MPCs, use the clear mpoa client cache command in EXEC mode.
Syntax Description
name mpc-name (Optional) Specifies the name of the MPC with the specified name. ingress (Optional) Clears ingress cache entries associated with the MPC. egress (Optional) Clears egress cache entries associated with the MPC. ip-address ip-address (Optional) Clears matching cache entries with the specified IP address.
Defaults
The system defaults are:
clear lane server {interface slot/port [.subinterface-number] | name elan-name} [mac-address mac-address | client-atm-address atm-address | lecid lane-client-id | route-desc segment segment-number bridge bridge-number]
clear lane server {interface number [.subinterface-number] | name elan-name} [mac-address mac-address | client-atm-address atm-address | lecid lecid | route-desc segment segment-number bridge bridge-number]
Release
Modification
clear lane server name red
Command
Description
clear mpoa client cache
Command Modes
EXEC
Command History
11.3(3a)WA4(5) This command was introduced.
Release
Modification
Examples
The following example clears the ingress and egress cache entries for the MPC named ip_mpc:
clear mpoa client name ip_mpc cache
Related Commands
Displays the ingress or egress cache entries matching the IP addresses for the MPCs.
Command
Description
To clear the ingress and egress cache entries, use the clear mpoa server cache command in EXEC mode.
clear mpoa server [name mps-name] cache [ingress | egress] [ip-address ip-address]
Syntax Description
name mps-name (Optional) Specifies the name of the MPS. If this keyword is omitted, this command will apply to all servers. ingress (Optional) Clears ingress cache entries associated with a server. egress (Optional) Clears egress cache entries associated with a server. ip-address ip-address (Optional) Clears matching cache entries with the specified IP address. If this keyword is omitted, this command will clear all entries.
Command Modes
EXEC
Command History
11.3(3a)WA4(5) This command was introduced.
Release
Modification
Usage Guidelines
This command clears cache entries.
Examples
The following example clears all cache entries:
clear mpoa server cache
Related Commands
show mpoa server cache Displays ingress and egress cache entries associated with a server.
Command
Description
To add a LANE client address entry to the configuration server's configuration database, use the client-atm-address command in database configuration mode. To remove a client address entry from the table, use the no form of this command.
client-atm-address atm-address-template name elan-name
Syntax Description
atm-address-template Template that explicitly specifies an ATM address or a specific part of an ATM address and uses wildcard characters for other parts of the ATM address, making it easy and convenient to specify multiple addresses matching the explicitly specified part. Wildcard characters can replace any nibble or group of nibbles in the prefix, the end-system identifier (ESI), or the selector fields of the ATM address. elan-name Name of the emulated LAN. Maximum length is 32 characters.
Defaults
No address and no emulated LAN name are provided.
Command Modes
Database configuration
Command History
11.0 This command was introduced.
Release
Modification
Usage Guidelines
The effect of this command is to bind any client whose address matches the specified template into the specified emulated LAN. When a client comes up, it consults the LANE configuration server, which responds with the ATM address of the LANE server for the emulated LAN. The client then initiates join procedures with the LANE server.
Before this command is used, the emulated LAN specified by the elan-name argument must have been created in the configuration server's database by use of the name server-atm-address command.
If an existing entry in the configuration server's database binds the LANE client ATM address to a different emulated LAN, the new command is rejected.
This command affects only the bindings in the named configuration server database. It has no effect on the LANE components themselves.
See the lane database command for information about creating the database, and the name server-atm-address command for information about binding the emulated LAN's name to the server's ATM address.
The client-atm-address name command is a subcommand of the global lane database command.
ATM Addresses
A LANE ATM address has the same syntax as a network service access point (NSAP), but it is not a network-level address. It consists of the following:
Address Templates
LANE ATM address templates can use two types of wildcards: an asterisk (*) to match any single character (nibble), and an ellipsis (...) to match any number of leading, middle, or trailing characters. The values of the characters replaced by wildcards come from the automatically assigned ATM address.
In LANE, a prefix template explicitly matches the prefix but uses wildcards for the ESI and selector fields. An ESI template explicitly matches the ESI field but uses wildcards for the prefix and selector.
In our implementation of LANE, the prefix corresponds to the switch, the ESI corresponds to the ATM interface, and the selector field corresponds to the specific subinterface of the interface.
Examples
The following example uses an ESI template to specify the part of the ATM address corresponding to the interface. This example allows any client on any subinterface of the interface that corresponds to the displayed ESI value, no matter to which switch the router is connected, to join the engineering emulated LAN:
client-atm-address ...0800.200C.1001.** name engineering
The following example uses a prefix template to specify the part of the ATM address corresponding to the switch. This example allows any client on a subinterface of any interface connected to the switch that corresponds to the displayed prefix to join the marketing emulated LAN:
client-atm-address 47.000014155551212f.00.00... name marketing
Related Commands
default-name Provides an ELAN name in the database of the configuration server for those client MAC addresses and client ATM addresses that do not have explicit ELAN name bindings. lane database Creates a named configuration database that can be associated with a configuration server. mac-address Sets the MAC layer address of the Cisco Token Ring. name server-atm-address Specifies or replaces the ATM address of the LANE server for the ELAN in the configuration database of the configuration server.
Command
Description
To enable a default aggregation cache, use the default command in aggregation cache configuration mode.
default [cache | enabled | export]
Syntax Description
cache (Optional) Configure NetFlow cache parameters. enabled (Optional) Enable the aggregation cache. export (Optional) Specify host/port to send flow statistics.
Defaults
No default behavior or values.
Command Modes
Aggregation cache configuration
Command History
12.0(3)T This command was introduced.
Releases
Modifications
Examples
The following example shows how to use the default command:
ip flow-aggregation cache as default enabled
Related Commands
Configures aggregation cache operational parameters. enabled Enables an aggregation cache. export destination Enables the exporting of information from NetFlow aggregation caches. Enables aggregation cache configuration mode. Displays the statistics for the data export including the main cache and all other enabled caches.
Command
Command
To provide an emulated LAN name in the configuration server's database for those client MAC addresses and client ATM addresses that do not have explicit emulated LAN name bindings, use the default-name command in database configuration mode. To remove the default name, use the no form of this command.
default-name elan-name
Syntax Description
elan-name Default emulated LAN name for any LANE client MAC address or LANE client ATM address not explicitly bound to any emulated LAN name. Maximum length is 32 characters.
Defaults
No name is provided.
Command Modes
Database configuration
Command History
11.0 This command was introduced.
Release
Modification
Usage Guidelines
This command affects only the bindings in the configuration server's database. It has no effect on the LANE components themselves.
The named emulated LAN must already exist in the configuration server's database before this command is used. If the default name-to-emulated LAN name binding already exists, the new binding replaces it.
The default-name command is a subcommand of the global lane database command.
Examples
The following example specifies the emulated Token Ring LAN man as the default emulated LAN. Because none of the emulated LANs are restricted, clients are assigned to whichever emulated LAN they request. Clients that do not request a particular emulated LAN will be assigned to the man emulated LAN.
lane database example2 name eng server-atm-address 39.000001415555121101020304.0800.200c.1001.02 name eng local-seg-id 1000 name man server-atm-address 39.000001415555121101020304.0800.200c.1001.01 name man local-seg-id 2000 name mkt server-atm-address 39.000001415555121101020304.0800.200c.4001.01 name mkt local-seg-id 3000 default-name man
Related Commands
client-atm-address name Adds a LANE client address entry to the configuration database of the configuration server. lane database Creates a named configuration database that can be associated with a configuration server. mac-address Sets the MAC layer address of the Cisco Token Ring. name server-atm-address Specifies or replaces the ATM address of the LANE server for the ELAN in the configuration database of the configuration server.
Command
Description
To enable an aggregation cache, use the enabled command in aggregation cache configuration mode.
enabledSyntax Description
This command has no arguments or keywords.
Defaults
No default behavior or values.
Command Modes
Aggregation cache configuration
Command History
12.0(3)T This command was introduced.
Release
Modification
Examples
The following example shows how to use the enabled command:
enabled
Related Commands
Configures aggregation cache operational parameters. Enables the exporting of information from NetFlow aggregation caches. Enables aggregation cache configuration mode. Displays the statistics for the data export including the main cache and all other enabled caches.
Command
Description
To enable IEEE 802.1Q encapsulation of traffic on a specified subinterface in virtual LANs, use the encapsulation dot1q command in subinterface configuration mode. IEEE 802.1Q is a standard protocol for interconnecting multiple switches and routers and for defining VLAN topologies.
encapsulation dot1q vlan-id
Syntax Description
vlan-id Virtual LAN identifier. The allowed range is from 1 to 1000.
Defaults
Disabled
Command Modes
Subinterface configuration
Command History
12.0(1)T This command was introduced.
Release
Modification
Usage Guidelines
IEEE 802.1Q encapsulation is configurable on Fast Ethernet interfaces.
Examples
The following example encapsulates VLAN traffic using the IEEE 802.1Q protocol for VLAN 100:
interface fastethernet 4/1.100 encapsulation dot1q 100
Related Commands
encapsulation isl Enables the ISL, a Cisco proprietary protocol for interconnecting multiple switches and maintaining VLAN information as traffic goes between switches. encapsulation sde Enables IEEE 802.10 encapsulation of traffic on a specified subinterface in VLANs.
Command
Description
To enable the Inter-Switch Link (ISL), use the encapsulation isl command in subinterface configuration mode. ISL is a Cisco protocol for interconnecting multiple switches and routers, and for defining VLAN topologies.
encapsulation isl vlan-identifier
Syntax Description
vlan-identifier Virtual LAN identifier. The allowed range is from 1 to 1000.
Defaults
Disabled.
Command Modes
Subinterface configuration
Command History
11.1 This command was introduced.
Release
Modification
Usage Guidelines
ISL encapsulation is configurable on Fast Ethernet interfaces.
ISL encapsulation adds a 26-byte header to the beginning of the Ethernet frame. The header contains a 10-bit VLAN identifier that conveys VLAN membership identities between switches.
Examples
The following example enables ISL on Fast Ethernet subinterface 2/1.20:
interface FastEthernet 2/1.20 encapsulation isl 400
Related Commands
bridge-group Assigns each network interface to a bridge group. show bridge vlan Displays virtual LAN subinterfaces. show interfaces Displays statistics for all interfaces configured on the router or access server. show vlans Displays virtual LAN subinterfaces.
Command
Description
To enable IEEE 802.10 encapsulation of traffic on a specified subinterface in virtual LANs, use the encapsulation sde command in subinterface configuration mode. IEEE 802.10 is a standard protocol for interconnecting multiple switches and routers and for defining VLAN topologies.
encapsulation sde said
Syntax Description
said Security association identifier. This value is used as the virtual LAN identifier. The valid range is 0 through 0xFFFFFFFE.
Defaults
Disabled.
Command Modes
Subinterface configuration
Command History
10.3 This command was introduced.
Release
Modification
Usage Guidelines
SDE encapsulation is configurable only on the following interface types:
| IEEE 802.10 Routing | IEEE 802.10 Transparent Bridging |
|---|---|
|
|
Examples
The following example enables SDE on FDDI subinterface 2/0.1 and assigns a VLAN identifier of 9999:
interface fddi 2/0.1 encapsulation sde 9999
Related Commands
bridge-group Assigns each network interface to a bridge group. show bridge vlan Displays virtual LAN subinterfaces. show interfaces Displays statistics for all interfaces configured on the router or access server. show vlans Displays virtual LAN subinterfaces.
Command
Description
To enable TRISL, use the encapsulation tr-isl command in subinterface configuration mode. TRISL is a Cisco proprietary protocol for interconnecting multiple routers and switches and maintaining VLAN information as traffic goes between switches.
encapsulation tr-isl trbrf-vlan vlan-id bridge-num bridge-number
Syntax Description
vlan-id Number identifying the VLAN. bridge-num bridge-number Keyword that specifies the identification number of the bridge number on the ISL trunk. Possible values are from 1 to 4095.
Defaults
Disabled.
Command Modes
Subinterface configuration
Command History
11.3(4)T This command was introduced.
Release
Modification
Examples
In the following example, TRISL is enabled on a Fast Ethernet interface:
interface FastEthernet4/0.2
encapsulation tr-isl trbrf-vlan 999 bridge-num 14
Related Commands
clear drip counters Clears DRiP counters. clear vlan statistics Removes virtual LAN statistics from any statically or system configured entries. multiring Enables collection and use of RIF information. multiring trcrf-vlan Creates a pseudo-ring to terminate the RIF for source-routed traffic and assigns it to a VLAN. show drip Displays the status of the DRiP database. show vlans Displays virtual LAN subinterfaces. source-bridge trcrf-vlan Attaches a TrCRF VLAN to the virtual ring of the router.
Command
Description
To leave aggregation cache mode, use the exit command in aggregation cache configuration mode.
exitSyntax Description
This command has no arguments or keywords.
Defaults
No default behavior or values.
Command Modes
Aggregation cache configuration
Command History
12.0(3)T This command was introduced.
Release
Modification
Examples
The following example shows how to use the exit command:
exit
Related Commands
Configures aggregation cache operational parameters. Enables an aggregation cache. Enables the exporting of information from NetFlow aggregation caches. Enables aggregation cache configuration mode. Displays the statistics for the data export including the main cache and all other enabled caches.
Command
Description
To exit from the address family submode, use the exit-address-family command in address family submode.
exit-address-familySyntax Description
This command has no arguments or keywords.
Defaults
No default behavior or values.
Command Modes
Address family submode
Command History
12.0(5)T This command was introduced.
Release
Modification
Usage Guidelines
This command can be abbreviated to exit.
Examples
The following example shows how to exit the address-family command mode:
(config-router-af)# exit-address-family
Related Commands
Enters the address family submode for configuring routing protocols, such as BGP, RIP, and static routing.
Command
Description
To enable the exporting of information from NetFlow aggregation caches, use the export destination command in aggregation cache configuration mode.
To disable the exporting of NetFlow aggregation cache information, use the no form of this command.
export destination ip-address port
Syntax Description
ip-address Destination IP address. port Destination UDP port.
Defaults
An export destination is not set.
Command Modes
Aggregation cache configuration
Command History
12.0(3)T This command was introduced.
Release
Modification
Usage Guidelines
For version 8 data exports, the maximum number of aggregated flow records and the maximum size in bytes of each UDP datagram are as follows:
| Aggregation Scheme | Max. Number of Flow Records | UDP Packet Size |
|---|---|---|
BGP Autonomous System | 51 | 1456 bytes |
Destination Prefix | 44 | 1436 bytes |
Prefix | 35 | 1428 bytes |
Protocol Port | 51 | 1456 bytes |
Source Prefix | 44 | 1436 bytes |
Examples
The following example shows how to configure an export destination for an aggregation cache:
export destination 10.41.41.1 9992
Related Commands
Configures aggregation cache operational parameters. Enables an aggregation cache. Enables aggregation cache configuration mode. Displays the aggregation cache configuration. Displays the statistics for the data export including the main cache and all other enabled caches.
Command
Description
To associate the currently selected extended label ATM (XTagATM) interface with a particular external interface on the remotely controlled ATM switch, use the extended-port command in interface configuration mode.
extended-port ctrl-if {bpx bpx-port-number | descriptor vsi-descriptor | vsi vsi-port-number}
Syntax Description
ctrl-if Identifies the ATM interface used to control the remote ATM switch. VSI must be configured on this interface using the tag-control-protocol interface configuration command. bpx bpx-port-number Specifies the associated BPX interface using the native BPX syntax. slot.port [.virtual port] Note that this form of the command may be used only when the controlled switch is a BPX. descriptor vsi-descriptor Specifies the associated port by its VSI physical descriptor. Note that the vsi-descriptor string must match the corresponding VSI physical descriptor exactly. vsi vsi-port-number Specifies the associated port by its VSI logical interface number (integer).
Defaults
None
Command Modes
Interface configuration
Command History
12.0(3)T This command was introduced.
Release
Modification
Usage Guidelines
The extended-port interface configuration command associates an XTagATM interface with a particular external interface on the remotely controlled ATM switch. The three alternate forms of the command permit the external interface on the controlled ATM switch to be specified in three different ways.
Examples
The following example shows you how to create an extended label ATM interface and bind it to the BPX port 2.3.
interface XTagATM0 extended-port atm0/0 bpx 2.3
Related Commands
interface XTagATM Enters interface configuration mode for the extended MPLS ATM (XTagATM) interface.
Command
Description
To specify the holding time value for the MPS-p7 variable of an MPS, use the holding-time command in MPS configuration mode. To revert to the default value, use the no form of this command.
holding-time time
Syntax Description
time Specifies the holding time value in seconds.
Defaults
The default holding time is 1200 seconds (20 minutes).
Command Modes
MPS configuration
Command History
11.3(3a)WA4(5) This command was introduced.
Release
Modification
Examples
The following example sets the holding time to 600 seconds (10 minutes):
holding-time 600
To configure an import route map for a VRF, use the import map command in VRF submode.
import map route-map
Syntax Description
route-map Specifies the route map to be used as an import route map for the VRF.
Defaults
There is no default. A VRF has no import route map unless one is configured using the import map command.
Command Modes
VRF submode
Command History
12.0(5)T This command was introduced.
Release
Modification
Usage Guidelines
Use an import route map when an application requires finer control over the routes imported into a VRF than provided by the import and export extended communities configured for the importing and exporting VRF.
The import map command associates a route map with the specified VRF. You can filter routes that are eligible for import into a VRF, based on the route target extended community attributes of the route, through the use of a route map. The route map might deny access to selected routes from a community that is on the import list.
Examples
The following example shows how to configure an import route map for a VRF:
ip vrf vrf_blue import map blue_import_map
Related Commands
Configures a VRF routing table. Creates a route-target extended community for a VRF. Displays the set of defined VRFs and associated interfaces.
Command
Description
To insert or modify a path entry at a specific index, use the index command in IP explicit path subcommand mode.
index index command
Syntax Description
index Specifies entry index number. Valid range is from 0 to 65534. command One of the IP explicit path configuration commands that create or modify a path entry. (Currently, only the next-address command can be used.)
Defaults
No default behavior or values.
Command Modes
IP explicit path subcommand
Command History
12.0(5)S This command was introduced.
Release
Modification
Examples
The following command specifies where the next-address command should be inserted in the list:
index 6 next-address 3.3.29.3
Explicit Path identifier 6:
6: next-address 3.3.29.3
Related Commands
append-after Inserts a path entry after a specific index number. ip explicit-path Enters the subcommand mode for IP explicit paths to create or modify the named path. list Displays all or part of the explicit path or paths. next-address Specifies the next IP address in the explicit path. show ip explicit-paths Displays configured IP explicit paths.
Command
Description
To enter interface configuration mode for the extended label ATM (XTagATM) interface, use the interface XTagATM command in global configuration mode. The interface is created the first time this command is issued for a particular interface number.
interface XTagATM if-num
Syntax Description
if-num Interface number.
Defaults
None
Command Modes
Global configuration
Command History
12.0(3)T This command was introduced.
Release
Modification
Usage Guidelines
Extended label ATM interfaces are virtual interfaces that are created on first reference like tunnel interfaces. They are similar to ATM interfaces except that they only support TC-ATM encapsulation.
Examples
The following example shows you how to create the extended label ATM interface with the interface number 62:
interface XTagATM62
Related Commands
extended-port Associates the currently selected extended MPLS ATM (XTagATM) interface with a particular external interface on the remotely controlled ATM switch.
Command
Description
To control the invalidation rate of the IP route cache, use the ip cache-invalidate-delay command in global configuration mode. To allow the IP route cache to be immediately invalidated, use the no form of this command.
ip cache-invalidate-delay [minimum maximum quiet threshold]
Syntax Description
minimum (Optional) Minimum time (in seconds) between invalidation request and actual invalidation. The default is 2 seconds. maximum (Optional) Maximum time (in seconds) between invalidation request and actual invalidation. The default is 5 seconds. quiet (Optional) Length of quiet period (in seconds) before invalidation. threshold (Optional) Maximum number of invalidation requests considered to be quiet.
Defaults
minimum = 2 seconds
maximum = 5 seconds, and 3 seconds with no more than zero invalidation requests
Command Modes
Global configuration
Command History
10.0 This command was introduced.
Release
Modification
Usage Guidelines
All cache invalidation requests are honored immediately.
This command should typically not be used except under the guidance of technical support personnel. Incorrect settings can seriously degrade network performance.
The IP fast-switching and autonomous-switching features maintain a cache of IP routes for rapid access. When a packet is to be forwarded and the corresponding route is not present in the cache, the packet is process-switched and a new cache entry is built. However, when routing table changes occur (such as when a link or an interface goes down), the route cache must be flushed so that it can be rebuilt with up-to-date routing information.
This command controls how the route cache is flushed. The intent is to delay invalidation of the cache until after routing has settled down. Because route table changes tend to be clustered in a short period of time, and the cache may be flushed repeatedly, a high CPU load might be placed on the router.
When this feature is enabled, and the system requests that the route cache be flushed, the request is held for at least minimum seconds. Then the system determines whether the cache has been "quiet" (that is, less than threshold invalidation requests in the last quiet seconds). If the cache has been quiet, the cache is then flushed. If the cache does not become quiet within maximum seconds after the first request, it is flushed unconditionally.
Manipulation of these parameters trades off CPU utilization versus route convergence time. Timing of the routing protocols is not affected, but removal of stale cache entries is affected.
Examples
The following example sets a minimum delay of 5 seconds, a maximum delay of 30 seconds, and a quiet threshold of no more than 5 invalidation requests in the previous 10 seconds:
ip cache-invalidate-delay 5 30 10 5
Related Commands
Configures the router to export the flow cache entry to a workstation when a flow expires. Displays the routing table cache used to fast switch IP traffic.
Command
Description
To enable Cisco Express Forwarding (CEF) on the route processor card, use the ip cef command in global configuration mode. To disable CEF, use the no form of this command.
ip cef [distributed]
Syntax Description
distributed (Optional) Enables distributed CEF (dCEF) operation. Distributes CEF information to line cards. Line cards perform express forwarding.
Defaults
Cisco 7000 series equipped with RSP7000 CEF is not enabled. Cisco 7200 series CEF is not enabled. Cisco 7500 series CEF is enabled. Cisco 12000 series Gigabit Switch Router Distributed CEF is enabled.
On this platform...
The default is...
Command Modes
Global configuration
Command History
11.1 CC This command was introduced.
Release
Modification
Usage Guidelines
This command is not available on the Cisco 12000 series GSR because that router series operates only in distributed CEF mode.
CEF is advanced Layer 3 IP switching technology. CEF optimizes network performance and scalability for networks with dynamic, topologically dispersed traffic patterns, such as those associated with Web-based applications and interactive sessions.
Examples
The following example enables standard CEF operation:
ip cef
The following example enables dCEF operation:
ip cef distributed
Related Commands
ip route-cache cef Reenables disabled CEF or DCEF operation on an interface.
Command
Description
Posted: Sun Mar 19 13:22:56 PST 2000
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