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

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 name of this logical interface.

Note:

If you do not assign a name when you configure virtual NNI links for Multi-Area boundary nodes on 7520 Series and 7720 Series, the system autogenerates the name and displays the name as Virtual-link-x, where x is the loopback interface ID.

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 or a loopback interface.

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.

SDWAN OPER STATE

Displays the one of the following states of the SD-WAN tunnel:

  • N/A (undefined)

  • UP

  • DOWN

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  ISIS  SDWAN
               TYPE       PORT/MLT   (PRIMARY)   DEST-IP  PORT/MLT   VLAN   VRF    STATUS   SRC-IP           MTU   OPER STATE     
----------------------------------------------------------------------------------------------------------------------------
1     SD-WAN-1 IP          --        --          192.0.2.3 Port1/44  4047   sd-wan disabled 192.0.2.1 ZTF    1400  UP
2     --       L2-P2P-VID  Port2/1   101,201(101)    --      --        --    --    disabled   --      config       N/A
3     --       L2-P2P-VID  Port1/3   102,202(102)    --      --        --    --    disabled   --      config       N/A
----------------------------------------------------------------------------------------------------------------------------
3 out of 3 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  SDWAN    
                 TYPE  PORT/MLT (PRIMARY) DEST-IP  PORT/MLT      VLAN    VRF          STATUS    SRC-IP            MTU   OPER STATE
---------------------------------------------------------------------------------------------------------------------------
1 SD-WAN-1       IP     --      --       192.0.2.3    Port1/44    4047   sd-wan       disabled  192.0.2.1  ZTF     1400  UP
2 SPBoIP_T1      IP     --      --       192.0.2.15   Port1/25    500    vrf23        disabled  192.0.2.16 CONFIG  1000  N/A
3 SPBoIP_T2      IP     --      --       192.0.2.224  MLT10       2      vrf24        disabled  192.0.2.22 CONFIG  1600  N/A
4 Virtual-link-4 IP     --      --       4.4.4.4      PortRX-NNI  4051   GlobalRouter disabled  2.2.2.2    CONFIG  1600  N/A
5 Virtual-link-5 IP     --      --       5.5.5.5      Null        0      GlobalRouter disabled  2.2.2.2    CONFIG  1600  N/A
---------------------------------------------------------------------------------------------------------------------------
5 out of 5 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      SD-WAN-1
2      SPBoIP_T1
3      SPBoIP_T2
4      Virtual-link-4
5      Virtual-link-5 
-----------------------------------------------------------
4 out of 4 Total Num of Logical ISIS interfaces 
-----------------------------------------------------------