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AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V300R003 CLI-based Configuration Guide - MPLS

This document describes MPLS features on the device and provides configuration procedures and configuration examples.

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Example for Configuring Srefresh Based on Manual TE FRR

Example for Configuring Srefresh Based on Manual TE FRR

Networking Requirements

As shown in Figure 4-50, the primary CR-LSP is along the path LSRA -> LSRB -> LSRC -> LSRD, and the link between LSRB and LSRC needs to be protected by FRR.

A bypass CR-LSP is set up along the path LSRB -> LSRE -> LSRC. LSRB functions as the PLR and LSRC functions as the MP.

The primary and bypass MPLS TE tunnels are set up by using explicit paths. RSVP-TE is used as the signaling protocol.

The Srefresh function needs to be configured on LSRB and LSRC.

Figure 4-50  Networking for configuring Srefresh based on manual TE FRR

Configuration Roadmap

The configuration roadmap is as follows:

  1. Configure manual TE FRR.

  2. Configure Srefresh on the PLR and MP along a tunnel to enhance transmission reliability of RSVP messages and improve resource use efficiency.

Procedure

  1. Assign IP addresses to interfaces.

    # Configure LSRA. The configurations of LSRB, LSRC, LSRD, and LSRE are similar to the configuration of LSRA, and are not mentioned here. 

    <Huawei> system-view
[Huawei] sysname LSRA
[LSRA] interface gigabitethernet 1/0/0
[LSRA-GigabitEthernet1/0/0] ip address 172.1.1.1 255.255.255.0
[LSRA-GigabitEthernet1/0/0] quit
[LSRA] interface loopback 1
[LSRA-LoopBack1] ip address 1.1.1.9 255.255.255.255
[LSRA-LoopBack1] quit

  2. Configure IS-IS to advertise routes.

    # Configure LSRA. The configurations of LSRB, LSRC, LSRD, and LSRE are similar to the configuration of LSRA, and are not mentioned here. 

    [LSRA] isis 1
[LSRA-isis-1] network-entity 00.0005.0000.0000.0001.00
[LSRA-isis-1] is-level level-2
[LSRA-isis-1] quit
[LSRA] interface gigabitethernet 1/0/0
[LSRA-GigabitEthernet1/0/0] isis enable 1
[LSRA-GigabitEthernet1/0/0] quit
[LSRA] interface loopback 1
[LSRA-LoopBack1] isis enable 1
[LSRA-LoopBack1] quit

    After the configurations are complete, run the display ip routing-table command on each LSR. You can see that the LSRs learn the routes from each other.

  3. Configure basic MPLS functions and enable MPLS TE, CSPF, RSVP-TE, and IS-IS TE.

    # Configure LSRA. The configurations of LSRB, LSRC, LSRD, and LSRE are similar to the configuration of LSRA, and are not mentioned here. CSPF needs to be enabled only on the ingress node of the primary tunnel (LSRA) and the ingress node LSRB of the bypass tunnel (LSRB); CSPF does not need to be enabled on LSRC, LSRD, or LSRE.

    [LSRA] mpls lsr-id 1.1.1.9
[LSRA] mpls
[LSRA-mpls] mpls te
[LSRA-mpls] mpls rsvp-te
[LSRA-mpls] mpls te cspf
[LSRA-mpls] quit
[LSRA] interface gigabitethernet 1/0/0
[LSRA-GigabitEthernet1/0/0] mpls
[LSRA-GigabitEthernet1/0/0] mpls te
[LSRA-GigabitEthernet1/0/0] mpls rsvp-te
[LSRA-GigabitEthernet1/0/0] quit
[LSRA] isis
[LSRA-isis-1] cost-style wide
[LSRA-isis-1] traffic-eng level-2
[LSRA-isis-1] quit

  4. On LSRA, create an MPLS TE tunnel for the primary CR-LSP.

    # Configure the explicit path of the primary CR-LSP.

    [LSRA] explicit-path pri-path
[LSRA-explicit-path-pri-path] next hop 172.1.1.2
[LSRA-explicit-path-pri-path] next hop 172.2.1.2
[LSRA-explicit-path-pri-path] next hop 172.3.1.2
[LSRA-explicit-path-pri-path] next hop 4.4.4.9
[LSRA-explicit-path-pri-path] quit

    # Configure the MPLS TE tunnel interface of the primary CR-LSP.

    [LSRA] interface tunnel 0/0/1
[LSRA-Tunnel0/0/1] ip address unnumbered interface loopback 1
[LSRA-Tunnel0/0/1] tunnel-protocol mpls te
[LSRA-Tunnel0/0/1] destination 4.4.4.9
[LSRA-Tunnel0/0/1] mpls te tunnel-id 100
[LSRA-Tunnel0/0/1] mpls te signal-protocol rsvp-te
[LSRA-Tunnel0/0/1] mpls te path explicit-path pri-path

    # Enable TE FRR.

    [LSRA-Tunnel0/0/1] mpls te fast-reroute
[LSRA-Tunnel0/0/1] mpls te commit
[LSRA-Tunnel0/0/1] quit

    After the configurations are complete, run the display interface tunnel command on LSRA. You can see that the status of Tunnel0/0/1 is Up.

  5. Configure a bypass CR-LSP on LSRB that functions as the PLR.

    # Configure the explicit path of the bypass CR-LSP.

    [LSRB] explicit-path by-path
[LSRB-explicit-path-by-path] next hop 172.4.1.2
[LSRB-explicit-path-by-path] next hop 172.5.1.2
[LSRB-explicit-path-by-path] next hop 3.3.3.9
[LSRB-explicit-path-by-path] quit

    # Configure a tunnel interface of the bypass CR-LSP.

    [LSRB] interface tunnel 0/0/2
[LSRB-Tunnel0/0/2] ip address unnumbered interface loopback 1
[LSRB-Tunnel0/0/2] tunnel-protocol mpls te
[LSRB-Tunnel0/0/2] destination 3.3.3.9
[LSRB-Tunnel0/0/2] mpls te tunnel-id 300
[LSRB-Tunnel0/0/2] mpls te signal-protocol rsvp-te
[LSRB-Tunnel0/0/2] mpls te path explicit-path by-path
[LSRB-Tunnel0/0/2] mpls te bypass-tunnel

    # Bind the bypass CR-LSP to the protected interface.

    [LSRB-Tunnel0/0/2] mpls te protected-interface gigabitethernet 2/0/0
[LSRB-Tunnel0/0/2] mpls te commit
[LSRB-Tunnel0/0/2] quit

    After the configurations are complete, run the display interface tunnel command on LSRB. You can see that the status of Tunnel0/0/2 is Up.

    # On the PLR, set the TE FRR scanning interval to 120.

    [LSRB] mpls
[LSRB-mpls] mpls te timer fast-reroute 120
[LSRB-mpls] quit

  6. Configure the Srefresh function on LSRB and LSRC.

    # Configure the Srefresh function on LSRB.

    [LSRB] mpls
[LSRB-mpls] mpls rsvp-te srefresh
[LSRB-mpls] quit

    # Configure the Srefresh function on LSRC.

    [LSRC] mpls
[LSRC-mpls] mpls rsvp-te srefresh
[LSRC-mpls] quit

  7. Verify the configuration.

    # Run the display mpls rsvp-te statistics global command on LSRB. You can view the status of the Srefresh function. If the command output shows that the values of SendSrefreshCounter, RecSrefreshCounter, SendAckMsgCounter, and RecAckMsgCounter are not zero, Srefresh packets are successfully transmitted. 

    [LSRB] display mpls rsvp-te statistics global
 LSR ID: 2.2.2.9                      LSP Count: 2                              
 PSB Count: 2                         RSB Count: 2                              
 RFSB Count: 1                                                                  
                                                                                
Total Statistics Information:                                                   
 PSB CleanupTimeOutCounter: 0         RSB CleanupTimeOutCounter: 0              
 SendPacketCounter: 122613            RecPacketCounter: 127446                  
 SendCreatePathCounter: 25            RecCreatePathCounter: 260                 
 SendRefreshPathCounter: 62209        RecRefreshPathCounter: 62113              
 SendCreateResvCounter: 21            RecCreateResvCounter: 31                  
 SendRefreshResvCounter: 60101        RecRefreshResvCounter: 64792              
 SendResvConfCounter: 0               RecResvConfCounter: 0                     
 SendHelloCounter: 0                  RecHelloCounter: 0                        
 SendAckCounter: 0                    RecAckCounter: 0                          
 SendPathErrCounter: 242              RecPathErrCounter: 0                      
 SendResvErrCounter: 0                RecResvErrCounter: 0                      
 SendPathTearCounter: 11              RecPathTearCounter: 8                     
 SendResvTearCounter: 2               RecResvTearCounter: 0                     
 SendSrefreshCounter: 1               RecSrefreshCounter: 1                     
 SendAckMsgCounter: 1                 RecAckMsgCounter: 1                       
 SendChallengeMsgCounter: 0           RecChallengeMsgCounter: 0                 
 SendResponseMsgCounter: 0            RecResponseMsgCounter: 0                  
 SendErrMsgCounter: 0                 RecErrMsgCounter: 0                       
 SendRecoveryPathMsgCounter: 0        RecRecoveryPathMsgCounter: 0              
 SendGRPathMsgCounter: 0              RecGRPathMsgCounter: 0                    
 ResourceReqFaultCounter: 0           RecGRPathMsgFromLSPMCounter: 0            
 Bfd neighbor count: 3                Bfd session count: 0

    # Shut down the protected outbound interface GE 2/0/0 on LSRB.

    [LSRB] interface gigabitethernet 2/0/0
[LSRB-GigabitEthernet2/0/0] shutdown
    # Run the display interface tunnel 0/0/1 command on LSRA. You can view the status of the primary CR-LSP and that the status of the tunnel interface is still Up.
    [LSRA] display interface tunnel 0/0/1
Tunnel0/0/1 current state : UP                                                  
Line protocol current state : UP                                                
Last line protocol up time : 2013-01-21 10:58:49                                
Description:
...

    # Run the tracert lsp te tunnel 0/0/1 command on LSRA. You can view the path that the tunnel passes.

    [LSRA] tracert lsp te tunnel 0/0/1
  LSP Trace Route FEC: TE TUNNEL IPV4 SESSION QUERY Tunnel0/0/1 , press CTRL_C t
o break.                                                                        
  TTL   Replier            Time    Type      Downstream                         
  0                                Ingress   172.1.1.2/[1034 ]                  
  1     172.1.1.2          1 ms    Transit   172.4.1.2/[1042 1025 ]             
  2     172.4.1.2          1 ms    Transit   172.5.1.2/[3 ]                     
  3     172.5.1.2          2 ms    Transit   172.3.1.2/[3 ]                     
  4     4.4.4.9            2 ms    Egress

    # The preceding information shows that services on the link have been switched to the bypass CR-LSP.

    # Run the display mpls te tunnel name Tunnel0/0/1 verbose command on LSRB. You can see that the bypass CR-LSP is in use.

    [LSRB] display mpls te tunnel name Tunnel0/0/1 verbose
    No                      :  1
    Tunnel-Name             :  Tunnel0/0/1
    Tunnel Interface Name   :  -                   
    TunnelIndex             :  1           LSP Index         :  2048
    Session ID              :  100         LSP ID            :  5
    LSR Role                :  Transit     
    Ingress LSR ID          :  1.1.1.9
    Egress LSR ID           :  4.4.4.9
    In-Interface            :  GE1/0/0
    Out-Interface           :  GE2/0/0
    Sign-Protocol           :  RSVP TE     Resv Style        :  SE
    IncludeAnyAff           :  0x0         ExcludeAnyAff     :  0x0
    IncludeAllAff           :  0x0
    ER-Hop Table Index      :  -           AR-Hop Table Index:  0
    C-Hop Table Index       :  -
    PrevTunnelIndexInSession:  -           NextTunnelIndexInSession:  -
    PSB Handle              :  16634
    Created Time            :  2013/01/19 06:45:49                              
    RSVP LSP Type           :  - 
    --------------------------------
              DS-TE Information
    --------------------------------
    Bandwidth Reserved Flag :  Unreserved
    CT0 Bandwidth(Kbit/sec) :  0           CT1 Bandwidth(Kbit/sec):  0
    CT2 Bandwidth(Kbit/sec) :  0           CT3 Bandwidth(Kbit/sec):  0
    CT4 Bandwidth(Kbit/sec) :  0           CT5 Bandwidth(Kbit/sec):  0
    CT6 Bandwidth(Kbit/sec) :  0           CT7 Bandwidth(Kbit/sec):  0
    Setup-Priority          :  7           Hold-Priority     :  7
    --------------------------------
                FRR Information
    --------------------------------
    Primary LSP Info
    TE Attribute Flag       :  0x63        Protected Flag    :  0x1
    Bypass In Use           :  In Use
    Bypass Tunnel Id        :  19
    BypassTunnel            :  Tunnel Index[Tunnel0/0/2], InnerLabel[1042]
    Bypass LSP ID           :  2           FrrNextHop        :  172.5.1.2
    ReferAutoBypassHandle   :  -
    FrrPrevTunnelTableIndex :  -           FrrNextTunnelTableIndex:  -
    Bypass Attribute(Not configured)
    Setup Priority          :  -           Hold Priority     :  -
    HopLimit                :  -           Bandwidth         :  -
    IncludeAnyGroup         :  -           ExcludeAnyGroup   :  -
    IncludeAllGroup         :  -
    Bypass Unbound Bandwidth Info(Kbit/sec)
    CT0 Unbound Bandwidth   :  -           CT1 Unbound Bandwidth:  -
    CT2 Unbound Bandwidth   :  -           CT3 Unbound Bandwidth:  -
    CT4 Unbound Bandwidth   :  -           CT5 Unbound Bandwidth:  -
    CT6 Unbound Bandwidth   :  -           CT7 Unbound Bandwidth:  -
    --------------------------------
               BFD Information
    --------------------------------
    NextSessionTunnelIndex  :  -           PrevSessionTunnelIndex:  -
    NextLspId               :  -           PrevLspId         :  -

    # Run the display mpls rsvp-te statistics global command on LSRB to view Srefresh statistics.

    [LSRB] display mpls rsvp-te statistics global
 LSR ID: 2.2.2.9                      LSP Count: 2                              
 PSB Count: 2                         RSB Count: 2                              
 RFSB Count: 1                                                                  
                                                                                
Total Statistics Information:                                                   
 PSB CleanupTimeOutCounter: 0         RSB CleanupTimeOutCounter: 0              
 SendPacketCounter: 122707            RecPacketCounter: 127580                  
 SendCreatePathCounter: 27            RecCreatePathCounter: 304                 
 SendRefreshPathCounter: 62220        RecRefreshPathCounter: 62122              
 SendCreateResvCounter: 22            RecCreateResvCounter: 32                  
 SendRefreshResvCounter: 60111        RecRefreshResvCounter: 64803              
 SendResvConfCounter: 0               RecResvConfCounter: 0                     
 SendHelloCounter: 0                  RecHelloCounter: 0                        
 SendAckCounter: 0                    RecAckCounter: 0                          
 SendPathErrCounter: 287              RecPathErrCounter: 0                      
 SendResvErrCounter: 0                RecResvErrCounter: 0                      
 SendPathTearCounter: 11              RecPathTearCounter: 8                     
 SendResvTearCounter: 2               RecResvTearCounter: 0                     
 SendSrefreshCounter: 13              RecSrefreshCounter: 14                    
 SendAckMsgCounter: 14                RecAckMsgCounter: 13                      
 SendChallengeMsgCounter: 0           RecChallengeMsgCounter: 0                 
 SendResponseMsgCounter: 0            RecResponseMsgCounter: 0                  
 SendErrMsgCounter: 0                 RecErrMsgCounter: 0                       
 SendRecoveryPathMsgCounter: 0        RecRecoveryPathMsgCounter: 0              
 SendGRPathMsgCounter: 0              RecGRPathMsgCounter: 0                    
 ResourceReqFaultCounter: 0           RecGRPathMsgFromLSPMCounter: 0            
 Bfd neighbor count: 2                Bfd session count: 0

    # Because the Srefresh function is configured globally on LSRB and LSRC, the Srefresh function takes effect on LSRB and LSRC when the primary tunnel fails.

Configuration Files

  • LSRA configuration file

    #
 sysname LSRA
#
mpls lsr-id 1.1.1.9
mpls
 mpls te
 mpls rsvp-te
 mpls te cspf
#
explicit-path pri-path
 next hop 172.1.1.2
 next hop 172.2.1.2
 next hop 172.3.1.2
 next hop 4.4.4.9
#
isis 1
 is-level level-2
 cost-style wide
 network-entity 00.0005.0000.0000.0001.00
 traffic-eng level-2
#
interface GigabitEthernet1/0/0
 ip address 172.1.1.1 255.255.255.0
 isis enable 1
 mpls
 mpls te
 mpls rsvp-te
#
interface LoopBack1
 ip address 1.1.1.9 255.255.255.255
 isis enable 1
#
interface Tunnel0/0/1
 ip address unnumbered interface LoopBack1
 tunnel-protocol mpls te
 destination 4.4.4.9
 mpls te record-route label
 mpls te path explicit-path pri-path
 mpls te tunnel-id 100
 mpls te fast-reroute
 mpls te commit
#
return

  • LSRB configuration file

    #
 sysname LSRB
#
mpls lsr-id 2.2.2.9
mpls
 mpls te
 mpls te timer fast-reroute 120
 mpls rsvp-te
 mpls rsvp-te srefresh
 mpls te cspf
#
explicit-path by-path
 next hop 172.4.1.2
 next hop 172.5.1.2
 next hop 3.3.3.9
#
isis 1
 is-level level-2
 cost-style wide
 network-entity 00.0005.0000.0000.0002.00
 traffic-eng level-2
#
interface GigabitEthernet1/0/0
 ip address 172.1.1.2 255.255.255.0
 isis enable 1
 mpls
 mpls te
 mpls rsvp-te
#
interface GigabitEthernet2/0/0
 ip address 172.2.1.1 255.255.255.0
 isis enable 1
 mpls
 mpls te
 mpls rsvp-te
#
interface GigabitEthernet3/0/0
 ip address 172.4.1.1 255.255.255.0
 isis enable 1
 mpls
 mpls te
 mpls rsvp-te
#
interface LoopBack1
 ip address 2.2.2.9 255.255.255.255
 isis enable 1
#
interface Tunnel0/0/2
 ip address unnumbered interface LoopBack1
 tunnel-protocol mpls te
 destination 3.3.3.9
 mpls te tunnel-id 300
 mpls te record-route
 mpls te path explicit-path by-path
 mpls te bypass-tunnel
 mpls te protected-interface GigabitEthernet 2/0/0
 mpls te commit
#
return

  • LSRC configuration file

    #
 sysname LSRC
#
mpls lsr-id 3.3.3.9
mpls
 mpls te
 mpls rsvp-te
 mpls rsvp-te srefresh
#
isis 1
 is-level level-2
 cost-style wide
 network-entity 00.0005.0000.0000.0003.00
 traffic-eng level-2
#
interface GigabitEthernet1/0/0
 ip address 172.2.1.2 255.255.255.0
 isis enable 1
 mpls
 mpls te
 mpls rsvp-te
#
interface GigabitEthernet2/0/0
 ip address 172.3.1.1 255.255.255.0
 isis enable 1
 mpls
 mpls te
 mpls rsvp-te
#
interface GigabitEthernet3/0/0
 ip address 172.5.1.2 255.255.255.0
 isis enable 1
 mpls
 mpls te
 mpls rsvp-te
#
interface LoopBack1
 ip address 3.3.3.9 255.255.255.255
 isis enable 1
#
return

  • LSRD configuration file

    #
 sysname LSRD
#
mpls lsr-id 4.4.4.9
mpls
 mpls te
 mpls rsvp-te
#
isis 1
 is-level level-2
 cost-style wide
 network-entity 00.0005.0000.0000.0004.00
 traffic-eng level-2
#
interface GigabitEthernet1/0/0
 ip address 172.3.1.2 255.255.255.0
 isis enable 1
 mpls
 mpls te
 mpls rsvp-te
#
interface LoopBack1
 ip address 4.4.4.9 255.255.255.255
 isis enable 1
#
return

  • LSRE configuration file

    #
 sysname LSRE
#
mpls lsr-id 5.5.5.9
mpls
 mpls te
 mpls rsvp-te
#
isis 1
 is-level level-2
 cost-style wide
 network-entity 00.0005.0000.0000.0005.00
 traffic-eng level-2
#
interface GigabitEthernet1/0/0
 ip address 172.4.1.2 255.255.255.0
 isis enable 1
 mpls
 mpls te
 mpls rsvp-te
#
interface GigabitEthernet2/0/0
 ip address 172.5.1.1 255.255.255.0
 isis enable 1
 mpls
 mpls te
 mpls rsvp-te
#
interface LoopBack1
 ip address 5.5.5.9 255.255.255.255
 isis enable 1
#
return
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