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ME60 V800R010C10SPC500 Configuration Guide - IP Routing 01

This is ME60 V800R010C10SPC500 Configuration Guide - IP Routing
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Example for Configuring Public Network IPv6 FRR

Example for Configuring Public Network IPv6 FRR

With public network IPv6 FRR, traffic can be rapidly switched to a backup link if the primary link fails.

Networking Requirements

On the network shown in Figure 2-10, it is required that the backup outbound interface and backup next hop must be configured on Device T so that link B functions as the backup of link A. If link A fails, traffic is rapidly switched to the backup link (Link B).

Figure 2-10 Networking for configuring public network IPv6 FRR
NOTE:

Interfaces 1 through 3 in this example are GE 1/0/0, GE 2/0/0, GE 3/0/0, respectively.



Precautions

Before configuring public network IPv6 FRR, there must be at least two routes of different routing protocols but destined for the same IPv6 address.

Configuration Roadmap

The configuration roadmap is as follows:

  1. Enable OSPFv3 on Device T, Device A, and Device C.

  2. Enable IPv6 IS-IS on Device T, Device B, and Device C.

  3. Enable public network IPv6 FRR on Device T, and then check information about the backup outbound interface and backup next hop.

  4. Disable IPv6 FRR, and then check information about the backup outbound interface and backup next hop.

Data Preparation

To complete the configuration, you need the following data:

  • OSPFv3 process IDs of Device T, Device A, and Device C

    ( OSPFv3 process ID is 1 )
  • IPv6 IS-IS area addresses of Device T,Device B, and Device C

Procedure

  1. Configure an IPv6 address for each interface. For configuration details, see Configuration Files in this section.
  2. Configure OSPFv3 on Device T, Device A, and Device C. For configuration details, see Configuration Files in this section.
  3. Configure IPv6 IS-IS on Device T, Device B, and Device C. For configuration details, see Configuration Files in this section.
  4. Check routing information.

    # On Device T, check the routes to 20::1/64.

    <DeviceT> display ipv6 routing-table 2001:db8:20::1 64 verbose
    Routing Table : _public_
    Summary Count : 2
    
    Destination  : 2001:db8:20::                          PrefixLength : 64
    NextHop      : 2001:db8:200::2                         Preference   : 10
    Neighbour    : ::                                      ProcessID    : 1
    Label        : NULL                                    Protocol     : OSPFv3
    State        : Active Adv                              Cost         : 3
    Entry ID     : 0                                       EntryFlags   : 0x00000000
    Reference Cnt: 0                                       Tag          : 0
    IndirectID   : 0x69                                    Age          : 269sec
    RelayNextHop : ::                                      TunnelID     : 0x0
    Interface    : gigabitethernet 3/0/0                   Flags        : D
    
    Destination  : 2001:db8:20::                          PrefixLength : 64
    NextHop      : 2001:db8:100::2                         Preference   : 15
    Neighbour    : ::                                      ProcessID    : 1
    Label        : NULL                                    Protocol     : ISIS
    State        : Inactive Adv                            Cost         : 30
    Entry ID     : 0                                       EntryFlags   : 0x00000000
    Reference Cnt: 0                                       Tag          : 0
    IndirectID   : 0xb5                                    Age          : 201sec
    RelayNextHop : ::                                      TunnelID     : 0x0
    Interface    : gigabitethernet 3/0/0                   Flags        : 0

    The preceding command output shows that there are two routes to 2001:db8:20::1/64 and that the route with 2001:db8:200::2 as the next hop is optimal because the OSPFv3 route priority is higher than the IS-IS route priority.

  5. Enable public network IPv6 FRR.

    # Enable IPv6 FRR on Device T.

    [~DeviceT] ipv6 frr
    [*DeviceT] commit

    # Check information about the backup outbound interface and backup next hop on Device T.

    <DeviceT> display ipv6 routing-table 2001:db8:20::1 64 verbose
    Routing Table : _public_
    Summary Count : 2
    
    Destination  : 2001:db8:20::                           PrefixLength : 64
    NextHop      : 2001:db8:200::2                         Preference  : 10
    Neighbour    : ::                                      ProcessID    : 1
    Label        : NULL                                    Protocol    : OSPFv3
    State        : Active Adv                              Cost         : 3
    Entry ID     : 0                                       EntryFlags   : 0x00000000
    Reference Cnt: 0                                       Tag          : 0
    IndirectID   : 0x69                                    Age          : 553sec
    RelayNextHop : ::                                      TunnelID     : 0x0
    Interface    : gigabitethernet 3/0/0                   Flags        : D
    BkNextHop   : 2001:db8:100::2                         BkInterface : gigabitethernet 3/0/0
    BkLabel      : NULL                                    BkTunnelID   : 0x0
    BkPETunnelID : 0x0                                     BkIndirectID : 0xb5
    
    Destination  : 2001:db8:20::                           PrefixLength : 64
    NextHop      : 2001:db8:100::2                         Preference  : 15
    Neighbour    : ::                                      ProcessID    : 1
    Label        : NULL                                    Protocol     : ISIS
    State        : Inactive Adv                            Cost         : 30
    Entry ID     : 0                                       EntryFlags   : 0x00000000
    Reference Cnt: 0                                       Tag          : 0
    IndirectID   : 0xb5                                    Age          : 485sec
    RelayNextHop : ::                                      TunnelID     : 0x0
    Interface    : gigabitethernet 3/0/0                  Flags        : 0

    The preceding command output shows that the route to 2001:db8:20::1/64 has a backup outbound interface and a backup next hop and that the IPv6 IS-IS route is the backup route.

  6. Verify the configuration.

    # Simulate a link fault on Device T.

    [~DeviceT] interface gigabitethernet 3/0/0
    [~DeviceT-GigabitEthernet3/0/0] shutdown
    [*DeviceT-GigabitEthernet3/0/0] commit
    [~DeviceT-GigabitEthernet3/0/0] quit

    # On Device T, check the routes to 2001:db8:20::1/64.

    <DeviceT> display ipv6 routing-table 2001:db8:20::1 64 verbose
    Routing Table : _public_
    Summary Count : 1
    
    Destination  : 2001:db8:20::                           PrefixLength : 64
    NextHop      : 2001:db8:100:2                          Preference   : 15
    Neighbour    : ::                                      ProcessID    : 1
    Label        : NULL                                    Protocol    : ISIS
    State        : Active Adv                              Cost         : 30
    Entry ID     : 0                                       EntryFlags   : 0x00000000
    Reference Cnt: 0                                       Tag          : 0
    IndirectID   : 0xb5                                    Age          : 1279sec
    RelayNextHop : ::                                      TunnelID     : 0x0
    Interface    : gigabitethernet 3/0/0                   Flags        : D

    The preceding command output shows that traffic has been switched to link B.

Configuration Files

  • Device T configuration file

    #
    sysname DeviceT
    #
    ipv6 frr
    #
    isis 1
     is-level level-1 
     ipv6 enable topology standard
     network-entity 10.0000.0000.0001.00
    #
    ospfv3 1
     router-id 1.1.1.1
     area 0.0.0.0
     area 0.0.0.1
    # 
    interface GigabitEthernet1/0/0
     undo shutdown
     ipv6 enable
     ipv6 address 2001:db8:10::1/64
     ospfv3 1 area 0.0.0.1
     isis ipv6 enable 1
    #
    interface GigabitEthernet3/0/0
     undo shutdown
     ipv6 enable
     ipv6 address 2001:db8:200::1/64
     ospfv3 1 area 0.0.0.0
    #
    interface GigabitEthernet3/0/0
     undo shutdown
     ipv6 enable
     ipv6 address 2001:db8:100::1/64
     isis enable 1
     isis ipv6 enable 1
    #
    return
  • Device A configuration file

    #
    sysname DeviceA
    #
    ospfv3 1
     router-id 2.2.2.2
     area 0.0.0.0
    #
    interface GigabitEthernet1/0/0
     undo shutdown
     ipv6 enable
     ipv6 address 2001:db8:200::2/64
     ospfv3 1 area 0.0.0.0
    #
    interface GigabitEthernet3/0/0
     undo shutdown
     ipv6 enable
     ipv6 address 2001:db8:201::2/64
     ospfv3 1 area 0.0.0.0
    #
    return
  • Device B configuration file

    #
    sysname DeviceB
    #
    isis 1
     is-level level-1 
     ipv6 enable topology standard
     network-entity 10.0000.0000.0002.00
    #
    interface GigabitEthernet1/0/0
     undo shutdown
     ipv6 enable
     ipv6 address 2001:db8:100::2/64
     isis ipv6 enable 1 
    #
    interface GigabitEthernet3/0/0
     undo shutdown
     ipv6 enable
     ipv6 address 2001:db8:101::2/64
     isis ipv6 enable 1 
    #
    return
  • Device C configuration file

    #
    sysname DeviceC
    #
    isis 1
     is-level level-1 
     ipv6 enable topology standard 
     network-entity 10.0000.0000.0003.00
    #
    ospfv3 1
     router-id 1.1.1.1
     area 0.0.0.0
     area 0.0.0.2
    #
    interface GigabitEthernet1/0/0
     undo shutdown
     ipv6 enable
     ipv6 address 2001:db8:20::1/64
     isis enable 1
    #
    interface GigabitEthernet3/0/0
     undo shutdown
     ipv6 enable
     ipv6 address 2001:db8:201::1/64
     ospfv3 1 area 0.0.0.2
    #
    interface GigabitEthernet3/0/0
     undo shutdown
     ipv6 enable
     ipv6 address 2001:db8:101::1/64
     isis enable 1
     isis ipv6 enable 1 
    #
    return
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Updated: 2019-01-04

Document ID: EDOC1100059437

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