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NE20E-S V800R010C10SPC500 Configuration Guide - MPLS 01

This is NE20E-S V800R010C10SPC500 Configuration Guide - MPLS
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Configuring MPLS Detour FRR

Configuring MPLS Detour FRR

MPLS detour FRR automatically creates a detour LSP on each eligible node along primary CR-LSP to protect downstream links or nodes.

Context

TE FRR provides local link or node protection for TE tunnels. TE FRR is working in either facility backup or one-to-one backup. Table 3-9 compares facility backup and one-to-one backup.

Table 3-9 Comparison between facility backup and one-to-one backup

Mode

Advantages

Disadvantage

Facility backup

Is extensible, resource efficient, and easy to implement.

Bypass tunnels must be manually planned and configured, which is time-consuming and laborious on a complex network.

One-to-one backup

Is easy to configure, eliminates manual network planning, and provides flexibility on a complex network.

Each node has to maintain the status of detour LSPs, which consumes additional bandwidth resources.

TE FRR in one-to-one backup mode is also called MPLS detour FRR. Each eligible node automatically creates a detour LSP.

This section describes how to configure MPLS detour FRR. For information about how to configure TE FRR in facility backup mode, see Configuring MPLS TE Manual FRR and Configuring MPLS TE Auto FRR.

NOTE:
  • The facility backup and one-to-one backup modes are mutually exclusive on the same TE tunnel interface. If both modes are configured, the latest configured mode overrides the previous one.

  • After MPLS detour FRR is configured, nodes on a TE tunnel are automatically enabled to record routes and labels. Before you disable the route and label record functions, disable MPLS detour FRR.

Pre-configuration Tasks

Before configuring MPLS detour FRR, configure an RSVP-TE tunnel.

NOTE:

Enable CSPF on each node along both the primary and backup LSPs.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface tunnelinterface-number

    The TE tunnel interface view is displayed.

  3. Run mpls te detour

    MPLS detour FRR is enabled.

    On the same tunnel interface, both the mpls te detour and mpls te fast-reroute commands can be run. The latest configuration overrides the previous one.

  4. Run commit

    The configuration is committed.

Checking the Configurations

After configuring MPLS detour FRR, run the following commands to check the configurations.

  • Run the display mpls te tunnel command to view TE tunnel information.

    <HUAWEI> display mpls te tunnel
    * means the LSP is detour LSP
    -------------------------------------------------------------------------------
    Ingress LsrId   Destination     LSPID In/OutLabel     R Tunnel-name
    -------------------------------------------------------------------------------
    1.1.1.1         5.5.5.5         23    -/32830         I Tunnel1
    1.1.1.1         5.5.5.5         23   *-/32830         I Tunnel1
    -------------------------------------------------------------------------------
    R: Role, I: Ingress, T: Transit, E: Egress
  • Run the display mpls te tunnel path command to view TE tunnel path information on a local node.

    <HUAWEI> display mpls te tunnel path
     Tunnel Interface Name : Tunnel1
     Lsp ID : 1.1.1.1 :100 :23
     Hop Information
      Hop 0   10.1.1.1 Local-Protection available | node
      Hop 1   10.1.1.2 Label 32830
      Hop 2   3.3.3.3 Label 32830
      Hop 3   10.1.3.1 Local-Protection available
      Hop 4   10.1.3.2 Label 3
      Hop 5   5.5.5.5 Label 3
      
     Tunnel Interface Name : Tunnel1
     Lsp ID : 1.1.1.1 :100 :23
     Detour Lsp  PLR ID :10.1.2.1 
     Hop Information
      Hop 0   10.1.2.1
      Hop 1   10.1.2.2 Label 32830
      Hop 2   2.2.2.2 Label 32830
      Hop 3   10.1.6.1
      Hop 4   10.1.6.2 Label 32831
      Hop 5   4.4.4.4 Label 32831
      Hop 6   10.1.7.1
      Hop 7   10.1.7.2 Label 32830
      Hop 8   6.6.6.6 Label 32830
      Hop 9   10.1.5.2
      Hop 10  10.1.5.1 Label 3
      Hop 11  5.5.5.5 Label 3
  • Run the display mpls rsvp-te psb-content command to view RSVP-TE path state block (PSB) information.

    <HUAWEI> display mpls rsvp-te psb-content
    -------------------------------------------------------------------------------
                           The PSB Content
    -------------------------------------------------------------------------------
     Tunnel Addr: 5.5.5.5                     Exist time: 16h 1m 13s
     Tunnel ExtID: 1.1.1.1                    Session ID: 100
     Ingress LSR ID: 1.1.1.1                  Local LSP ID: 23
     Previous Hop: ----                       Next Hop: 10.1.1.2
     Incoming / Outgoing Interface: ---- / GigabitEthernet0/1/1
     InLabel: NULL                            OutLabel: 32830
     Send Message ID: 0                       Recv Message ID: 0
     Session Attribute:
       SetupPrio: 7                           HoldPrio: 7
       SessionAttrib: SE Style desired
                      Label Record desired
     CSPF Route Flag: False
     LSP Type: -
     FRR Flag: No protection                  Local RRO Flag: 0x9
     FRR Mode: One-to-One BackUp
     ERO Information:
          L-Type          ERO-IPAddr          ERO-PrefixLen          Label
       ERHOP_STRICT       10.1.1.2            32
       ERHOP_STRICT       10.1.3.1            32
       ERHOP_STRICT       10.1.3.2            32
     RRO Information-
       -----        
     SenderTspec Information-
       Token bucket rate: 0
       Token bucket size: 1000
       Peak data rate: 0
       Minimum policed unit: 1
       Maximum packet size: 1500
     CT-BandWidth Information(Bytes/sec):
       CT0 Bandwidth:  0                      CT1 Bandwidth:  0
       CT2 Bandwidth:  0                      CT3 Bandwidth:  0
       CT4 Bandwidth:  0                      CT5 Bandwidth:  0
       CT6 Bandwidth:  0                      CT7 Bandwidth:  0
     Path Message arrive on Unknown(0x0) from PHOP 0.0.0.0
     Path Message sent to NHOP 10.1.1.2 on GigabitEthernet0/1/1
    
     Resource Reservation OK
                    
     LSP Statistics Information:
       SendPacketCounter: 1947                RecvPacketCounter: 0
       SendPathCounter: 1947                  RecvPathCounter: 0
       SendResvCounter: 0                     RecvResvCounter: 0
       SendPathErrCounter: 0                  RecvPathErrCounter: 0
       SendResvErrCounter: 0                  RecvResvErrCounter: 0
       SendPathTearCounter: 0                 RecvPathTearCounter: 0
       SendResvTearCounter: 0                 RecvResvTearCounter: 0
       SendSrefreshCounter: 0                 RecvSrefreshCounter: 0
                    
     Detour Information:
       PLR ID    : 10.1.2.1 
       Avoid Node: 3.3.3.3
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Updated: 2019-01-03

Document ID: EDOC1100055103

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