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This chapter describes the function and displays the syntax for Systems Network Architecture (SNA) Frame Relay Access Support (FRAS) commands. For more information about defaults and usage guidelines, see the corresponding chapter of the Bridging and IBM Networking Command Reference.
Use the frame-relay map llc2 interface configuration command to map LLC2 traffic to a data-link connection identifier (DLCI). Use the no form of this command to cancel the LLC2 map.
frame-relay map llc2 dlci-number
dlci-number | Frame Relay DLCI. |
Use the frame-relay map rsrb interface configuration command to specify the DLCI number onto which the RSRB traffic is to be mapped. Use the no form of this command to cancel the RSRB map.
frame-relay map rsrb dlci-number
dlci-number | Frame Relay DLCI. |
Use the fras backup dlsw interface configuration command to configure an auxiliary route between the end stations and the host for use as a backup when the DLCI connection to the Frame Relay network is lost. Use the no form of this command to cancel the backup configuration.
fras backup dlsw virtual-mac-address target-ring-number host-mac-address [retry
virtual-mac-address | 12-digit hexadecimal string used as a source MAC address for all packets going to the host. |
target-ring-number | Number configured in the source-bridge ring-group command. This is a virtual ring. The valid range is 1 to 4095. |
host-mac-address | Destination MAC address of the host. |
retry retry-number | (Optional) Number of attempts by the end station to reconnect to the primary Frame Relay interface before activating the backup link. The range is 1 to 5 retries. If the retry option is not specified, the default number of retries is 5. |
Use the fras ban interface configuration command to associate bridging over a Frame Relay network using boundary access node (BAN). Use the no form of this command to cancel each association.
fras ban local-ring bridge-number ring-group ban-dlci-mac dlci dlci1 [dlci2 dlci5]
local-ring | Decimal number from 1 to 4095 describing the Token Ring interface. |
bridge-number | Decimal number from 1 to 15 that uniquely identifies a bridge connecting two rings. |
ring-group | Decimal number from 1 to 4095 representing a collection of Token Ring interfaces on one or more routers. |
ban-dlci-mac | Frame Relay BAN PVC MAC address. |
dlci | Keyword that precedes the list of one or more Frame Relay DLCI numbers. |
dlci1 [dlci2 dlci5] | Frame Relay DLCI decimal number between 16 and 1007. If more than one DLCI number is needed for load balancing in the FRAS BAN configuration command, a maximum of five is allowed. |
bni mac-addr | (Optional) Boundary node identifier (BNI) MAC address of the NCP that receives frames from the router. |
Use the fras ddr-backup interface configuration command to configure an auxiliary interface for use as a backup when the primary Frame Relay link to the Frame Relay WAN fails. Use the no form of this command to cancel the backup configuration.
fras ddr-backup interface interface dlci-number
interface interface | The interface over which the backup connection is made. |
dlci-number | The DLCI number of the session. |
Use the fras-host ban interface configuration command to enable the FRAS Host function for BAN. Use the no form of this command to disable the FRAS Host BAN functionality.
fras-host ban (sub)interface hmac hmac [bni bni]
(sub)interface | Associated Frame Relay interface or subinterface. |
hmac hmac | MAC address of the CIP adapter or LAN-attached host. |
bni bni | (Optional) Boundary node identifier MAC address. The default bni is 4FFF.0000.0000. |
Use the fras-host bnn interface configuration command to enable the FRAS Host function for BNN. Use the no form of this command to disable the FRAS Host function.
fras-host bnn (sub)interface fr-lsap sap vmac virt-mac hmac hmac [hsap hsap]
(sub)interface | Associated Frame Relay interface or subinterface. |
fr-lsap sap | LLC2 service access point (SAP). The destination SAP on inbound BNN frames received from Frame Relay. |
vmac virt-mac | Used in combination with the DLCI number to form a unique MAC address. The first 4 bytes of the MAC address are formed by the VMAC while the last 2 bytes are formed from the DLCI number. The last 2 bytes of the VMAC must be configured as zeros. |
hmac hmac | MAC address of the CIP adaptor or LAN-attached host. |
hsap hsap | (Optional) Host SAP. If this parameter is not specified, the host SAP value used will match fr-lsap. |
Use the fras-host dlsw-local-ack interface configuration command to enable LLC2 local termination for FRAS Host connections using the virtual Token-Ring. Use the no form of this command to disable LLC2 local termination.
fras-host dlsw-local-ackUse the fras map llc interface configuration command to associate an LLC connection with a Frame Relay DLCI. Use the no form of this command to disable the association.
fras map llc lan-lsap serial interface frame-relay dlci dlci fr-rsap
lan-lsap | LLC2 LAN SAP that is the local SAP address of the router. |
serial interface | Serial interface on which Frame Relay is configured. |
frame-relay dlci dlci | Frame Relay DLCI. |
fr-rsap | LLC2 Frame Relay SAP that is the destination SAP of the router on the Frame Relay side. |
Use the fras map sdlc interface configuration command to associate an SDLC link with a Frame Relay DLCI. Use the no form of this command to cancel the association.
fras map sdlc sdlc-address serial port frame-relay dlci fr-lsap fr-rsap [pfid2 |
sdlc-address | SDLC address of the downstream SNA device in hexadecimal. |
serial port | Serial interface on which Frame Relay is configured. |
frame-relay dlci | Frame Relay DLCI. |
fr-lsap | Local SAP address of the logical link connection on the Cisco Frame Relay Access Device (CFRAD). |
fr-rsap | Destination SAP address on the host. |
pfid | (Optional) FID2 SNA transmission header for SNA peripheral traffic. |
afid2 | (Optional) FID2 transmission header for APPN traffic. |
fid4 | (Optional) Transmission header used on SNA subarea flows. |
Use the interface virtual-tokenring command to create a virtual Token Ring interface. Use the no form of this command to cancel the configuration.
interface virtual-tokenring number
number | Number of the virtual Token Ring. |
Use the llc2 dynwind interface configuration command to enable dynamic window congestion management. Use the no form of this command to cancel the configuration.
llc2 dynwind [nw nw-number] [dwc dwc-number]
nw nw-number | (Optional) Specifies a number of frames that must be received to increment the working window value by 1. The default is 4. |
dwc dwc-number | (Optional) Specifies the number by which the working window value is divided when BECN occurs. Valid numbers are 1, 2, 4, 8, and 16. 1 is a special value that indicates that the working window value should be set to 1 when BECN is indicated. The default is 1. |
Use the show fras privileged EXEC command to view notification that the FRAS dial backup over DLSw+ feature is active, to display information about the connection state in FRAS, and to display current BNN, BAN, and dial backup information.
show frasUse the show fras-host EXEC command to display the status of LLC2 sessions using FRAS Host.
show fras-host [(sub)interface] [dlci dlci-num] [detail]
(sub)interface | (Optional) Displays LLC2 sessions from a specified Frame Relay interface or subinterface. |
dlci dlci-number | (Optional) Displays LLC2 sessions from a specified DLCI. |
detail | (Optional) Displays additional information such as the routing information fields (RIFs) and statistics associated with the LLC2 sessions. |
Use the show fras map privileged EXEC command to display the mapping and connection state of FRAS.
show fras mapUse the source-bridge interface configuration command to configure an interface for source-route bridging. Use the no form of this command to disable source-route bridging on an interface.
source-bridge source-ring-number bridge-number target-ring-number [conserve-ring]
source-ring-number | Ring number for the interface's Token Ring or FDDI ring. It must be a decimal number in the range 1 to 4095 that uniquely identifies a network segment or ring within the bridged Token Ring or FDDI network |
bridge-number | Number that uniquely identifies the bridge connecting the source and target rings. It must be a decimal number in the range 1 to 15. |
target-ring-number | Ring number of the destination ring on this router. The number must be unique within the bridged Token Ring or FDDI network. The target ring can also be a ring group. It must be a decimal number. |
conserve-ring | (Optional) Keyword to enable SRB over Frame Relay. When this option is configured, the SRB software does not add the ring number associated with the Frame Relay partner's virtual ring (PVC) to outbound explorer frames. This option is permitted for Frame Relay subinterfaces only. |
Posted: Mon Feb 8 13:51:45 PST 1999
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