Example for Configuring TI-LFA FRR for an SR-MPLS BE Tunnel

Topology-Independent Loop-Free Alternate (TI-LFA) FRR can be configured to enhance the reliability of an SR network.

Networking Requirements

On the network shown in Figure 1, IS-IS is enabled, and the SR-MPLS BE function is configured. The cost of the link between Device C and Device D is 100, and the cost of other links is 10. The optimal path from Device A to Device F is Device A -> Device B -> Device E -> Device F. TI-LFA FRR can be configured on Device B to provide local protection, enabling traffic to be quickly switched to the backup path (Device A -> Device B -> Device C -> Device D -> Device E -> Device F) when the link between Device B and Device E fails.

Figure 1 TI-LFA FRR for an SR-MPLS BE tunnel

Interfaces 1 through 3 in this example represent GE 0/1/0, GE 0/1/8, and GE 0/1/16, respectively.


Precautions

In this example, TI-LFA FRR is configured on DeviceB to protect the link between DeviceB and DeviceE. On a live network, you are advised to configure TI-LFA FRR on all nodes in the SR domain.

Configuration Roadmap

The configuration roadmap is as follows:

  1. Configure IS-IS on the entire network to implement interworking between devices.

  2. Enable MPLS on the entire network, configure SR, and establish an SR-MPLS BE tunnel.

  3. Enable TI-LFA FRR and anti-microloop on Device B.

Data Preparation

To complete the configuration, you need the following data:

  • MPLS LSR ID of each device

  • SRGB range of each device

Procedure

  1. Configure interface IP addresses.

    # Configure Device A.

    <HUAWEI> system-view
[~HUAWEI] sysname DeviceA
[*HUAWEI] commit
[~DeviceA] interface loopback 1
[*DeviceA-LoopBack1] ip address 1.1.1.9 32
[*DeviceA-LoopBack1] quit
[*DeviceA] interface gigabitethernet0/1/0
[*DeviceA-GigabitEthernet0/1/0] ip address 10.1.1.1 24
[*DeviceA-GigabitEthernet0/1/0] quit
[*DeviceA] commit

    Repeat this step for the other devices. For configuration details, see Configuration Files in this section.

  2. Configure an IGP to implement interworking. IS-IS is used as an example.

    # Configure Device A.

    [~DeviceA] isis 1
[*DeviceA-isis-1] is-level level-1
[*DeviceA-isis-1] network-entity 10.0000.0000.0001.00
[*DeviceA-isis-1] cost-style wide
[*DeviceA-isis-1] quit
[*DeviceA] interface loopback 1
[*DeviceA-LoopBack1] isis enable 1
[*DeviceA-LoopBack1] quit
[*DeviceA] interface gigabitethernet0/1/0
[*DeviceA-GigabitEthernet0/1/0] isis enable 1
[*DeviceA-GigabitEthernet0/1/0] quit
[*DeviceA] commit

    Repeat this step for the other devices. For configuration details, see Configuration Files in this section.

    Set the cost of the link between DeviceC and DeviceD to 100 to simulate a special network scenario.

    # Configure DeviceC.

    [~DeviceC] interface gigabitethernet0/1/8
[~DeviceC-GigabitEthernet0/1/8] isis cost 100
[*DeviceC-GigabitEthernet0/1/8] quit
[*DeviceC] commit

    # Configure DeviceD.

    [~DeviceD] interface gigabitethernet0/1/0
[~DeviceD-GigabitEthernet0/1/0] isis cost 100
[*DeviceD-GigabitEthernet0/1/0] quit
[*DeviceD] commit

  3. (Optional) Configure basic MPLS functions on the backbone network.

    MPLS is automatically enabled on the interface where IS-IS has been enabled. Therefore, you can skip this step.

    # Configure Device A.

    [~DeviceA] mpls lsr-id 1.1.1.9
[*DeviceA] mpls
[*DeviceA-mpls] commit
[~DeviceA-mpls] quit

    # Configure Device B.

    [~DeviceB] mpls lsr-id 2.2.2.9
[*DeviceB] mpls
[*DeviceB-mpls] commit
[~DeviceB-mpls] quit

    # Configure Device C.

    [~DeviceC] mpls lsr-id 3.3.3.9
[*DeviceC] mpls
[*DeviceC-mpls] commit
[~DeviceC-mpls] quit

    # Configure Device D.

    [~DeviceD] mpls lsr-id 4.4.4.9
[*DeviceD] mpls
[*DeviceD-mpls] commit
[~DeviceD-mpls] quit

    # Configure Device E.

    [~DeviceE] mpls lsr-id 5.5.5.9
[*DeviceE] mpls
[*DeviceE-mpls] commit
[~DeviceE-mpls] quit

    # Configure Device F.

    [~DeviceF] mpls lsr-id 6.6.6.9
[*DeviceF] mpls
[*DeviceF-mpls] commit
[~DeviceF-mpls] quit

  4. Configure SR on the backbone network and establish an SR-MPLS BE tunnel.

    # Configure Device A.

    [~DeviceA] segment-routing
[*DeviceA-segment-routing] quit
[*DeviceA] isis 1
[*DeviceA-isis-1] segment-routing mpls
[*DeviceA-isis-1] segment-routing global-block 16000 23999

    The SRGB range varies according to the device. The configuration in this example is for reference only.

    [*DeviceA-isis-1] quit
[*DeviceA] interface loopback 1
[*DeviceA-LoopBack1] isis prefix-sid index 10
[*DeviceA-LoopBack1] quit
[*DeviceA] commit

    # Configure Device B.

    [~DeviceB] segment-routing
[*DeviceB-segment-routing] quit
[*DeviceB] isis 1
[*DeviceB-isis-1] segment-routing mpls
[*DeviceB-isis-1] segment-routing global-block 16000 23999

    The SRGB range varies according to the device. The configuration in this example is for reference only.

    [*DeviceB-isis-1] quit
[*DeviceB] interface loopback 1
[*DeviceB-LoopBack1] isis prefix-sid index 20
[*DeviceB-LoopBack1] quit
[*DeviceB] commit

    # Configure Device C.

    [~DeviceC] segment-routing
[*DeviceC-segment-routing] quit
[*DeviceC] isis 1
[*DeviceC-isis-1] segment-routing mpls
[*DeviceC-isis-1] segment-routing global-block 16000 23999

    The SRGB range varies according to the device. The configuration in this example is for reference only.

    [*DeviceC-isis-1] quit
[*DeviceC] interface loopback 1
[*DeviceC-LoopBack1] isis prefix-sid index 30
[*DeviceC-LoopBack1] quit
[*DeviceC] commit

    # Configure Device D.

    [~DeviceD] segment-routing
[*DeviceD-segment-routing] quit
[*DeviceD] isis 1
[*DeviceD-isis-1] segment-routing mpls
[*DeviceD-isis-1] segment-routing global-block 16000 23999

    The SRGB range varies according to the device. The configuration in this example is for reference only.

    [*DeviceD-isis-1] quit
[*DeviceD] interface loopback 1
[*DeviceD-LoopBack1] isis prefix-sid index 40
[*DeviceD-LoopBack1] quit
[*DeviceD] commit

    # Configure Device E.

    [~DeviceE] segment-routing
[*DeviceE-segment-routing] quit
[*DeviceE] isis 1
[*DeviceE-isis-1] segment-routing mpls
[*DeviceE-isis-1] segment-routing global-block 16000 23999

    The SRGB range varies according to the device. The configuration in this example is for reference only.

    [*DeviceE-isis-1] quit
[*DeviceE] interface loopback 1
[*DeviceE-LoopBack1] isis prefix-sid index 50
[*DeviceE-LoopBack1] quit
[*DeviceE] commit

    # Configure Device F.

    [~DeviceF] segment-routing
[*DeviceF-segment-routing] quit
[*DeviceF] isis 1
[*DeviceF-isis-1] segment-routing mpls
[*DeviceF-isis-1] segment-routing global-block 16000 23999

    The SRGB range varies according to the device. The configuration in this example is for reference only.

    [*DeviceF-isis-1] quit
[*DeviceF] interface loopback 1
[*DeviceF-LoopBack1] isis prefix-sid index 60
[*DeviceF-LoopBack1] quit
[*DeviceF] commit

    # After completing the configurations, run the display segment-routing prefix mpls forwarding command on each device. The command output shows that SR-MPLS BE label forwarding paths have been established. The following example uses the command output on Device A.

    [~DeviceA] display segment-routing prefix mpls forwarding
                   Segment Routing Prefix MPLS Forwarding Information
             --------------------------------------------------------------
             Role : I-Ingress, T-Transit, E-Egress, I&T-Ingress And Transit

Prefix             Label      OutLabel   Interface         NextHop          Role  MPLSMtu   Mtu     State          
-----------------------------------------------------------------------------------------------------------------
1.1.1.9/32         16010      NULL       Loop1             127.0.0.1        E     ---       1500    Active          
2.2.2.9/32         16020      3          GE0/1/0           10.1.1.2         I&T   ---       1500    Active          
3.3.3.9/32         16030      16030      GE0/1/0           10.1.1.2         I&T   ---       1500    Active          
4.4.4.9/32         16040      16040      GE0/1/0           10.1.1.2         I&T   ---       1500    Active          
5.5.5.9/32         16050      16050      GE0/1/0           10.1.1.2         I&T   ---       1500    Active          
6.6.6.9/32         16060      16060      GE0/1/0           10.1.1.2         I&T   ---       1500    Active          

Total information(s): 6

  5. Configure TI-LFA FRR.

    # Configure Device B.

    [~DeviceB] isis 1
[~DeviceB-isis-1] avoid-microloop frr-protected
[*DeviceB-isis-1] avoid-microloop frr-protected rib-update-delay 5000
[*DeviceB-isis-1] avoid-microloop segment-routing
[*DeviceB-isis-1] avoid-microloop segment-routing rib-update-delay 10000
[*DeviceB-isis-1] frr
[*DeviceB-isis-1-frr] loop-free-alternate level-1
[*DeviceB-isis-1-frr] ti-lfa level-1
[*DeviceB-isis-1-frr] quit
[*DeviceB-isis-1] quit
[*DeviceB] commit

    After completing the configurations, run the display isis route [ level-1 | level-2 ] [ process-id ] [ verbose ] command on Device B. The command output shows IS-IS TI-LFA FRR backup entries.

    [~DeviceB] display isis route level-1 verbose
                         Route information for ISIS(1)
                         -----------------------------

                        ISIS(1) Level-1 Forwarding Table
                        --------------------------------


 IPV4 Dest  : 1.1.1.9/32         Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 1             Flags     : A/-/-/-
 Priority   : Medium             Age       : 04:35:30
 NextHop    :                    Interface :               ExitIndex :
    10.1.1.1                           GE0/1/0                    0x0000000e
 Prefix-sid : 16010              Weight    : 0             Flags     : -/N/-/-/-/-/A/-
 SR NextHop :                    Interface :               OutLabel  :
    10.1.1.1                           GE0/1/0                    3

 IPV4 Dest  : 2.2.2.9/32         Int. Cost : 0             Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 1             Flags     : D/-/L/-
 Priority   : -                  Age       : 04:35:30
 NextHop    :                    Interface :               ExitIndex :
    Direct                             Loop1                      0x00000000
 Prefix-sid : 16020              Weight    : 0             Flags     : -/N/-/-/-/-/A/L
 SR NextHop :                    Interface :               OutLabel  :
    Direct                             Loop1                      -

 IPV4 Dest  : 3.3.3.9/32         Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 1             Flags     : A/-/-/-
 Priority   : Medium             Age       : 04:09:15
 NextHop    :                    Interface :               ExitIndex :
    10.2.1.2                           GE0/1/8                     0x0000000a
 TI-LFA:        
 Interface  : GE0/1/16                                                               
 NextHop    : 10.5.1.2           LsIndex    : 0x00000002   ProtectType: L
 Backup Label Stack (Top -> Bottom): {16040, 48141}
 Prefix-sid : 16030              Weight    : 0             Flags     : -/N/-/-/-/-/A/-
 SR NextHop :                    Interface :               OutLabel  :
    10.2.1.2                           GE0/1/8                    3
 TI-LFA:        
 Interface  : GE0/1/16                                                               
 NextHop    : 10.5.1.2           LsIndex    : 0x00000002   ProtectType: L
 Backup Label Stack (Top -> Bottom): {16040, 48141}

 IPV4 Dest  : 4.4.4.9/32         Int. Cost : 20            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 1             Flags     : A/-/-/-
 Priority   : Medium             Age       : 04:09:15
 NextHop    :                    Interface :               ExitIndex :
    10.5.1.2                           GE0/1/16                    0x00000007
 TI-LFA:        
 Interface  : GE0/1/8                                                               
 NextHop    : 10.2.1.2           LsIndex    : 0x00000003   ProtectType: N
 Backup Label Stack (Top -> Bottom): {48142}
 Prefix-sid : 16040              Weight    : 0             Flags     : -/N/-/-/-/-/A/-
 SR NextHop :                    Interface :               OutLabel  :
    10.5.1.2                           GE0/1/16                    16040
 TI-LFA:        
 Interface  : GE0/1/8                                                               
 NextHop    : 10.2.1.2           LsIndex    : 0x00000003   ProtectType: N
 Backup Label Stack (Top -> Bottom): {48142}

 IPV4 Dest  : 5.5.5.9/32         Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 1             Flags     : A/-/-/-
 Priority   : Medium             Age       : 04:09:15
 NextHop    :                    Interface :               ExitIndex :
    10.5.1.2                           GE0/1/16                    0x00000007
 TI-LFA:        
 Interface  : GE0/1/8                                                               
 NextHop    : 10.2.1.2           LsIndex    : 0x00000003   ProtectType: L
 Backup Label Stack (Top -> Bottom): {48142}
 Prefix-sid : 16050              Weight    : 0             Flags     : -/N/-/-/-/-/A/-
 SR NextHop :                    Interface :               OutLabel  :
    10.5.1.2                           GE0/1/16                    3
 TI-LFA:        
 Interface  : GE0/1/8                                                               
 NextHop    : 10.2.1.2           LsIndex    : 0x00000003   ProtectType: L
 Backup Label Stack (Top -> Bottom): {48142}

 IPV4 Dest  : 6.6.6.9/32         Int. Cost : 20            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 1             Flags     : A/-/-/-
 Priority   : Medium             Age       : 04:09:15
 NextHop    :                    Interface :               ExitIndex :
    10.5.1.2                           GE0/1/16                    0x00000007
 TI-LFA:        
 Interface  : GE0/1/8                                                               
 NextHop    : 10.2.1.2           LsIndex    : 0x00000003   ProtectType: L
 Backup Label Stack (Top -> Bottom): {48142}
 Prefix-sid : 16060              Weight    : 0             Flags     : -/N/-/-/-/-/A/-
 SR NextHop :                    Interface :               OutLabel  :
    10.5.1.2                           GE0/1/16                    16060
 TI-LFA:        
 Interface  : GE0/1/8                                                               
 NextHop    : 10.2.1.2           LsIndex    : 0x00000003   ProtectType: L
 Backup Label Stack (Top -> Bottom): {48142}

 IPV4 Dest  : 10.1.1.0/24        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : D/-/L/-
 Priority   : -                  Age       : 04:35:30
 NextHop    :                    Interface :               ExitIndex :
    Direct                             GE0/1/0                    0x00000000

 IPV4 Dest  : 10.2.1.0/24        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : D/-/L/-
 Priority   : -                  Age       : 04:35:30
 NextHop    :                    Interface :               ExitIndex :
    Direct                             GE0/1/8                    0x00000000

 IPV4 Dest  : 10.3.1.0/24        Int. Cost : 110           Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : A/-/-/-
 Priority   : Low                Age       : 04:09:15
 NextHop    :                    Interface :               ExitIndex :
    10.2.1.2                           GE0/1/8                    0x0000000a
 TI-LFA:        
 Interface  : GE0/1/16                                                               
 NextHop    : 10.5.1.2           LsIndex    : 0x00000003   ProtectType: L
 Backup Label Stack (Top -> Bottom): {}

 IPV4 Dest  : 10.4.1.0/24        Int. Cost : 20            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : A/-/-/-
 Priority   : Low                Age       : 04:09:15
 NextHop    :                    Interface :               ExitIndex :
    10.5.1.2                           GE0/1/16                    0x00000007
 TI-LFA:        
 Interface  : GE0/1/8                                                               
 NextHop    : 10.2.1.2           LsIndex    : 0x00000003   ProtectType: L
 Backup Label Stack (Top -> Bottom): {48142}

 IPV4 Dest  : 10.5.1.0/24        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : D/-/L/-
 Priority   : -                  Age       : 04:09:37
 NextHop    :                    Interface :               ExitIndex :
    Direct                             GE0/1/16                    0x00000000

 IPV4 Dest  : 10.6.1.0/24        Int. Cost : 20            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : A/-/-/-
 Priority   : Low                Age       : 04:09:15
 NextHop    :                    Interface :               ExitIndex :
    10.5.1.2                           GE0/1/16                    0x00000007
 TI-LFA:        
 Interface  : GE0/1/8                                                               
 NextHop    : 10.2.1.2           LsIndex    : 0x00000003   ProtectType: L
 Backup Label Stack (Top -> Bottom): {48142}
     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut, 
            U-Up/Down Bit Set, LP-Local Prefix-Sid
     Protect Type: L-Link Protect, N-Node Protect

  6. Verify the configuration.

    # Run a tracert command on Device A to check the connectivity of the SR-MPLS BE tunnel to Device F. For example:

    [~DeviceA] tracert lsp segment-routing ip 6.6.6.9 32 version draft2
  LSP Trace Route FEC: SEGMENT ROUTING IPV4 PREFIX 6.6.6.9/32 , press CTRL_C to break.
  TTL    Replier            Time    Type      Downstream
  0                                 Ingress   10.1.1.2/[16060 ]
  1      10.1.1.2           291 ms  Transit   10.5.1.2/[16060 ]
  2      10.5.1.2           10 ms   Transit   10.6.1.2/[3 ]
  3      6.6.6.9            11 ms   Egress

    # Run the shutdown command on GE 0/1/16 of Device B to simulate a link fault between Device B and Device E.

    [~DeviceB] interface gigabitethernet0/1/16
[~DeviceB-GigabitEthernet0/1/16] shutdown
[*DeviceB-GigabitEthernet0/1/16] quit
[*DeviceB] commit

    # Run the tracert command on Device A again to check the connectivity of the SR-MPLS BE tunnel. For example:

    [~DeviceA] tracert lsp segment-routing ip 6.6.6.9 32 version draft2
  LSP Trace Route FEC: SEGMENT ROUTING IPV4 PREFIX 6.6.6.9/32 , press CTRL_C to break.
  TTL    Replier            Time    Type      Downstream
  0                                 Ingress   10.1.1.2/[16060 ]
  1      10.1.1.2           3 ms    Transit   10.2.1.2/[16060 ]
  2      10.2.1.2           46 ms   Transit   10.3.1.2/[16060 ]
  3      10.3.1.2           33 ms   Transit   10.4.1.2/[16060 ]
  4      10.4.1.2           48 ms   Transit   10.6.1.2/[3 ]
  5      6.6.6.9            4 ms    Egress

    The preceding command output shows that the SR-MPLS BE tunnel has been switched to the TI-LFA FRR backup path.

Configuration Files

  • Device A configuration file

    #
sysname DeviceA
#
mpls lsr-id 1.1.1.9
#               
mpls            
#               
segment-routing 
#               
isis 1          
 is-level level-1
 cost-style wide
 network-entity 10.0000.0000.0001.00
 segment-routing mpls
 segment-routing global-block 16000 23999
#               
interface GigabitEthernet0/1/0
 undo shutdown  
 ip address 10.1.1.1 255.255.255.0
 isis enable 1  
#               
interface LoopBack1
 ip address 1.1.1.9 255.255.255.255
 isis enable 1  
 isis prefix-sid index 10
#
return

  • Device B configuration file

    #
sysname DeviceB
#
mpls lsr-id 2.2.2.9
#               
mpls            
#               
segment-routing 
#               
isis 1          
 is-level level-1
 cost-style wide
 network-entity 10.0000.0000.0002.00
 avoid-microloop frr-protected
 avoid-microloop frr-protected rib-update-delay 5000
 segment-routing mpls
 segment-routing global-block 16000 23999
 avoid-microloop segment-routing
 avoid-microloop segment-routing rib-update-delay 10000
 frr
  loop-free-alternate level-1
  ti-lfa level-1
#               
interface GigabitEthernet0/1/0
 undo shutdown  
 ip address 10.1.1.2 255.255.255.0
 isis enable 1  
#               
interface GigabitEthernet0/1/8
 undo shutdown  
 ip address 10.2.1.1 255.255.255.0
 isis enable 1  
#               
interface GigabitEthernet0/1/16
 undo shutdown  
 ip address 10.5.1.1 255.255.255.0
 isis enable 1 
#               
interface LoopBack1
 ip address 2.2.2.9 255.255.255.255
 isis enable 1  
 isis prefix-sid index 20
#
return

  • Device C configuration file

    #
sysname DeviceC
#
mpls lsr-id 3.3.3.9
#               
mpls            
#               
segment-routing 
#               
isis 1          
 is-level level-1
 cost-style wide
 network-entity 10.0000.0000.0003.00
 segment-routing mpls
 segment-routing global-block 16000 23999
#               
interface GigabitEthernet0/1/0
 undo shutdown  
 ip address 10.2.1.2 255.255.255.0
 isis enable 1  
#               
interface GigabitEthernet0/1/8
 undo shutdown  
 ip address 10.3.1.1 255.255.255.0
 isis enable 1 
 isis cost 100
#               
interface LoopBack1
 ip address 3.3.3.9 255.255.255.255
 isis enable 1  
 isis prefix-sid index 30
#
return

  • Device D configuration file

    #
sysname DeviceD
#
mpls lsr-id 4.4.4.9
#               
mpls            
#               
segment-routing 
#               
isis 1          
 is-level level-1
 cost-style wide
 network-entity 10.0000.0000.0004.00
 segment-routing mpls
 segment-routing global-block 16000 23999
#               
interface GigabitEthernet0/1/0
 undo shutdown  
 ip address 10.3.1.2 255.255.255.0
 isis enable 1  
 isis cost 100
#               
interface GigabitEthernet0/1/8
 undo shutdown  
 ip address 10.4.1.1 255.255.255.0
 isis enable 1  
#               
interface LoopBack1
 ip address 4.4.4.9 255.255.255.255
 isis enable 1  
 isis prefix-sid index 40
#
return

  • Device E configuration file

    #
sysname DeviceE
#
mpls lsr-id 5.5.5.9
#               
mpls            
#               
segment-routing 
#               
isis 1          
 is-level level-1
 cost-style wide
 network-entity 10.0000.0000.0005.00
 segment-routing mpls
 segment-routing global-block 16000 23999
#               
interface GigabitEthernet0/1/0
 undo shutdown  
 ip address 10.6.1.1 255.255.255.0
 isis enable 1  
#               
interface GigabitEthernet0/1/8
 undo shutdown  
 ip address 10.4.1.2 255.255.255.0
 isis enable 1  
#               
interface GigabitEthernet0/1/16
 undo shutdown  
 ip address 10.5.1.2 255.255.255.0
 isis enable 1 
#               
interface LoopBack1
 ip address 5.5.5.9 255.255.255.255
 isis enable 1  
 isis prefix-sid index 50
#
return

  • Device F configuration file

    #
sysname DeviceF
#
mpls lsr-id 6.6.6.9
#               
mpls            
#               
segment-routing 
#               
isis 1          
 is-level level-1
 cost-style wide
 network-entity 10.0000.0000.0006.00
 segment-routing mpls
 segment-routing global-block 16000 23999
#               
interface GigabitEthernet0/1/0
 undo shutdown  
 ip address 10.6.1.2 255.255.255.0
 isis enable 1  
#               
interface LoopBack1
 ip address 6.6.6.9 255.255.255.255
 isis enable 1  
 isis prefix-sid index 60
#
return
Parent Topic: Configuring Examples for SR-MPLS BE
Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
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