show isis logical-interface

Display IS-IS logical interfaces.

Syntax

Command Parameters

name
Displays IS-IS logical interface name.

Default

None.

Command Mode

User EXEC

Usage Guidelines

Fabric Extend Tunnel IS-IS MTU configuration is added to the document in advance of Fabric Extend Integration with ExtremeCloud SD-WAN support. Feature support is planned for 8.10.1.

Command Output

The show isis logical-interface command displays the following information:

Output field

Description

IFIDX

Displays an index value for this logical interface.

NAME

Displays the administratively assigned name of this logical interface.

MTU

XA1400 only. Displays the Maximum Transmission Unit (MTU) size in bytes for this logical interface.

ENCAP TYPE

Displays whether the encapsulation type for the logical interface is Layer 2 (L2–P2P-VID) or Layer 3 (IP).

L2_INFO PORT/MLT

Displays the port or MLT that the logical interface is connected to in an Layer 2 network.

VIDS (PRIMARY)

Displays the list of VLANs that are associated with this Layer 2 logical interface.

TUNNEL DEST-IP

Displays the destination IP address for the logical interface.

L3_TUNNEL_NEXT_HOP_INFO PORT/MLT

Displays the outgoing interface (port or MLT) for VXLAN traffic.

L3_TUNNEL_NEXT_HOP_INFO VLAN

Displays the outgoing VLAN interface for VXLAN traffic.

L3_TUNNEL_NEXT_HOP_INFO VRF

Displays the name of the VRF that this Layer 3 logical interface is configured on.

BFD STATUS

Displays the status of BFD on this logical interface. The status can be enabled or disabled.

TUNNEL SRC-IP

Displays the source IP address for a Fabric Extend tunnel.

ORIGIN

Displays the origin of the IS-IS logical interface configuration. For example, Zero Touch Fabric Configuration (ZTF) or manual configuration (config) through CLI or EDM.

ISIS MTU

Displays the Maximum Transmission Unit (MTU) size in bytes for IS-IS packets that use this logical interface. FE-IP deployments only.

Examples

Example of a Layer 2 Core (FE-VID):

Switch:1>show isis logical-interface
================================================================================================================
                                              ISIS Logical Interfaces
================================================================================================================
IFIDX    NAME  ENCAP        L2_INFO      VIDS      TUNNEL   L3_TUNNEL_NEXT_HOP_INFO  BFD        TUNNEL   ORIGIN
               TYPE         PORT/MLT   (PRIMARY)   DEST-IP  PORT/MLT   VLAN   VRF    STATUS     SRC-IP
----------------------------------------------------------------------------------------------------------------

1      --     L2-P2P-VID    Port2/40  101,201(101)    --      --        --    --     disabled   --       config
2      --     L2-P2P-VID    Port1/3   102,202(102)    --      --        --    --     disabled   --       config
----------------------------------------------------------------------------------------------------------------
 2 out of 2 Total Num of Logical ISIS interfaces 
----------------------------------------------------------------------------------------------------------------

Example of a Layer 3 Core (FE-IP):

Switch:1>show isis logical-interface
================================================================================================================
                                                ISIS Logical Interfaces
================================================================================================================
IFIDX NAME ENCAP L2_INFO  VIDS      TUNNEL   L3_TUNNEL_NEXT_HOP_INFO   BFD        TUNNEL     ORIGIN   ISIS    
           TYPE  PORT/MLT (PRIMARY) DEST-IP  PORT/MLT   VLAN     VRF  STATUS      SRC-IP               MTU 
----------------------------------------------------------------------------------------------------------------
1  SPBoIP_T1  IP   --    --     50.50.50.9   Port1/25  500       vrf23 disabled  50.50.50.11  config  1000
2  SPBoIP_T2  IP   --    --     65.65.65.9   MLT10     2         vrf24 disabled  60.60.60.11  config  1600
----------------------------------------------------------------------------------------------------------------
2 out of 2 Total Num of Logical ISIS interfaces 
----------------------------------------------------------------------------------------------------------------

The command show isis logical-interface truncates the IS-IS logical interface name to the first 16 characters. To view the entire name (up to a maximum of 64 characters), use the command show isis logical-interface name.

Switch:1>show isis logical-interface name
========================================================================================
 						ISIS Logical Interface name
========================================================================================
ID     NAME   
              
----------------------------------------------------------------------------------------
1      SPBoIP_T1 
2      SPBoIP_T2 
3      SPBoIP_4K5
6      This_Is_A_50_Character_ISIS_Logical_Interface_Name 
----------------------------------------------------------------------------------------
 4 out of 4 Total Num of Logical ISIS interfaces 
----------------------------------------------------------------------------------------

The command show isis logical-interface mtu can be completed on the XA1400 Series only. The command displays the Maximum Transmission Unit (MTU) size in bytes for each logical interface.

Switch:1>show isis logical-interface mtu
========================================================================================
                   ISIS Logical Interface Mtu
========================================================================================
ID       NAME                                                              MTU
----------------------------------------------------------------------------------------
1        SPBoIP_T1                                                          751
2        SPBoIP_T2                                                         1000
3        SPBoIP_4K5                                                        1950
----------------------------------------------------------------------------------------
 3 out of 3 Total Num of Logical ISIS interfaces
----------------------------------------------------------------------------------------