display isis ti-lfa-node

Function

The display isis ti-lfa-node command displays TI-LFA information about nodes.

Format

display isis { ti-lfa-node [ process-id ] | [ process-id ] ti-lfa-node } [ level-1 | level-2 ] [ systemid systemid ]

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

Parameters

Parameter	Description	Value
process-id	Displays TI-LFA information about nodes in a specified process. If this parameter is not specified, TI-LFA information about all processes is displayed.	The value is an integer ranging from 1 to 4294967295.
level-1	Displays TI-LFA information about nodes in Level-1 areas.	-
level-2	Displays TI-LFA information about nodes in a Level-2 area. If no level is specified, TI-LFA information about nodes in all areas is displayed.	-
systemid systemid	Specifies the 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 a Flex-Algo ID.	The value is an integer ranging 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, you can run the display isis ti-lfa-node command to check information about all nodes or a specified node, including the P node's prefix, outbound interface, next hop, PQ node, P-to-Q label stack, and extended policy information.

Example

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

# Display TI-LFA information on nodes in Level 1 areas in an IS-IS process numbered 1.

<HUAWEI> display isis ti-lfa-node 1 level-1
Topology Independent LFA Node Table for ISIS(1)
                    -----------------------------------------
                                                              
                     ISIS(1) Level-1 Topology Independent LFA Node Table

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

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

DestNode       : 2222.2222.2222
NextNearPrefix : -
PNode          : 4444.4444.4444         QNode                : 3333.3333.3333 
PInterface     : GE0/1/0                PrimaryBkpNbr        : 4444.4444.4444 
Protect        : LINK                   AdjLabelStack (P->Q) : 32848, 32848
ExtendPolicy   : -
SRGB           : {162000, 163000}
AdjLabel       : (1111.1111.1111-00, 32848) (3333.3333.3333-00, 32849)

DestNode       : 3333.3333.3333
NextNearPrefix : -
PNode          : 4444.4444.4444         QNode                : 3333.3333.3333 
PInterface     : GE0/1/0                PrimaryBkpNbr        : 4444.4444.4444 
Protect        : LINKNODE               AdjLabelStack (P->Q) : 32848, 32848
ExtendPolicy   : -
SRGB           : {164000, 165000}
AdjLabel       : (2222.2222.2222-00, 32848) (5555.5555.5555-00, 32849)

DestNode       : 4444.4444.4444
NextNearPrefix : -
PNode          : 3333.3333.3333         QNode                : 3333.3333.3333 
PInterface     : GE0/1/8                PrimaryBkpNbr        : 2222.2222.2222 
Protect        : LINK                   AdjLabelStack (P->Q) : -
ExtendPolicy   : -
SRGB           : {168000, 169000}
AdjLabel       : (1111.1111.1111-00, 32849) (5555.5555.5555-00, 32848)

DestNode       : 5555.5555.5555
NextNearPrefix : -
PNode          : 4444.4444.4444         QNode                : 5555.5555.5555 
PInterface     : GE0/1/0                PrimaryBkpNbr        : 4444.4444.4444 
Protect        : LINKNODE               AdjLabelStack (P->Q) : 32848
ExtendPolicy   : -
SRGB           : {166000, 167000}
AdjLabel       : (3333.3333.3333-00, 32848) (4444.4444.4444-00, 32849)

**Table 1** Description of the **display isis ti-lfa-node** command output
Item	Description
DestNode	System ID of the destination node.
NextNearPrefix	Prefix preferentially selected by the P node.
PNode	System ID of the P node.
QNode	System ID of the Q node.
PInterface	Name of the backup outbound interface.
PrimaryBkpNbr	Backup next-hop node.
Protect	Protection type: LINK: link protection. LINKNODE: node protection.
AdjLabelStack (P->Q)	P-to-Q label stack.
ExtendPolicy	Extended policy, which determines whether the TI-LFA result is calculated under the SRLG policy. If yes, the SRLG policy name is displayed. Otherwise, no information is displayed.
SRGB	SRGB information of the destination node.
AdjLabel	Link label assigned by the destination node.