display isis srv6 ti-lfa-node

Function

The display isis srv6 ti-lfa-node command displays TI-LFA information on a specified node.

Format

display isis [ process-id ] srv6 ti-lfa-node [ ipv6 ] [ level-1 | level-2 ] [ systemid systemid ]

display isis [ process-id ] srv6 ti-lfa-node [ ipv6 ] [ level-1 | level-2 ] [ systemid systemid ] flex-algo flex-algo-id

Parameters

Parameter	Description	Value
process-id	Displays TI-LFA information on nodes in a specified process. If this parameter is not specified, TI-LFA information of all processes is displayed.	The value is an integer that ranges from 1 to 4294967295.
ipv6	Displays IPv6 topology information.	-
level-1	Displays TI-LFA information on nodes in a Level-1 area.	-
level-2	Displays TI-LFA information on nodes in a Level-2 area. If no level is specified, TI-LFA information of all area nodes is displayed.	-
systemid systemid	Displays the SPT topology of the system with a specified system ID or pseudo node ID.	The value is a hexadecimal integer in the format of XXXX.XXXX.XXXX.
flex-algo flex-algo-id	Specifies the identifier of a flexible algorithm.	The value is an integer that ranges from 128 to 255.

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name	Operations
isis	read

Usage Guidelines

Usage Scenario

After IS-IS TI-LFA FRR is configured on a device, run the display isis srv6 ti-lfa-node command to view TI-LFA information of a specific node or all nodes. The command output contains the P node's prefix, outbound interface name, next-hop IP address, P and Q nodes, and P-to-Q label stack.

Example

The actual command output varies according to the device. The command output here is only an example.

# Display TI-LFA information in a Level-1 area of IPv6 IS-IS process 1 that uses Flex-Algo 128.

<HUAWEI> display isis srv6 ti-lfa-node ipv6 level-1 flex-algo 128

              Topology Independent LFA Node Table for ISIS(1)
              -----------------------------------------------

  ISIS(1) level-1 Flex-algorithm(128) Topology Independent LFA Node Table

DestNode        : 0000.0000.0002         Protect        : LINK
PNode           : 0000.0000.0003         QNode          : 0000.0000.0003
ExitInterface   : GE0/1/1                NexthopAddr    : FE80::3A15:24FF:FE02:501
SidStack (P->Q) : (3128::1) INSERT
ExtendPolicy    : -                      CompressMode   : false 

DestNode        : 0000.0000.0003         Protect        : LINKNODE
PNode           : 0000.0000.0002         QNode          : 0000.0000.0002
ExitInterface   : GE0/1/2                NexthopAddr    : FE80::3A15:26FF:FE03:201
SidStack (P->Q) : -
ExtendPolicy    : -                      CompressMode   : false 

DestNode        : 0000.0000.0004         Protect        : LINKNODE
PNode           : 0000.0000.0005         QNode          : 0000.0000.0005
ExitInterface   : GE0/1/1                NexthopAddr    : FE80::3A15:24FF:FE02:501
SidStack (P->Q) : -
ExtendPolicy    : -                      CompressMode   : false 

DestNode        : 0000.0000.0005         Protect        : LINK
PNode           : 0000.0000.0004         QNode          : 0000.0000.0004
ExitInterface   : GE0/1/2                NexthopAddr    : FE80::3A15:26FF:FE03:201
SidStack (P->Q) : (4128::1) INSERT
ExtendPolicy    : -                      CompressMode   : false

# Display TI-LFA information on nodes in a Level 1 area in IPv6 IS-IS process 1.

<HUAWEI> display isis 1 srv6 ti-lfa-node level-1

              Topology Independent LFA Node Table for ISIS(1)
              -----------------------------------------------

            ISIS(1) Level-1 Topology Independent LFA Node Table
DestNode        : 1111.1111.1111         Protect              : LINK 
PNode           : 3333.3333.3333         QNode                : 3333.3333.3333 
ExitInterface   : GE0/1/1                NexthopAddr          : 2222.2222.2222 
SidStack (P->Q) :(FD00::83:422:0:363, FD00::83:422:0:364) INSERT
ExtendPolicy    : -                      CompressMode         : false


DestNode        : 3333.3333.3333         Protect              : LINK
PNode           : 4444.4444.4444         QNode                : 4444.4444.4444
ExitInterface   : GE0/1/1                NexthopAddr          : 2222.2222.2222
SidStack (P->Q) : (FD00::83:422:0:363, FD00::83:422:0:364) INSERT
ExtendPolicy    : -                      CompressMode         : false

**Table 1** Description of the **display isis srv6 ti-lfa-node** command output
Item	Description
DestNode	System ID of the destination node.
Protect	Protection type. LINK: link protection. LINKNODE: node protection.
PNode	System ID of the P node.
QNode	System ID of the Q node.
ExitInterface	Name of the backup outbound interface.
NexthopAddr	Backup next-hop node.
SidStack (P->Q)	P-to-Q SID label stack.
ExtendPolicy	Extended policy, which displays whether the SRv6 TI-LFA result is calculated under the SRLG policy. If yes, the SRLG policy name is displayed. Otherwise, no information is displayed.