6PE configuration example

As shown in Figure 76, use 6PE to connect two isolated IPv6 networks over an IPv4/MPLS network.

• The ISP uses OSPF as the IGP.

• PE 1 and PE 2 are edge devices of the ISP, and establish an IPv4 IBGP connection between them.

• CE 1 and CE 2 are edge devices of the IPv6 networks, and they connect the IPv6 networks to the ISP.

• A CE and a PE exchange IPv6 packets through IPv6 static routing.

1. Configure IPv6 addresses and IPv4 addresses for interfaces. (Details not shown.)

2. Configure PE 1:

   # Enable LDP globally, and configure the LSP generation policy.

   <PE1> system-view
   [PE1] mpls lsr-id 2.2.2.2
   [PE1] mpls ldp
   [PE1-ldp] lsp-trigger all
   [PE1-ldp] quit
   

   # Enable MPLS and LDP on VLAN-interface 30.

   [PE1] interface vlan-interface 30
   [PE1-Vlan-interface30] mpls enable
   [PE1-Vlan-interface30] mpls ldp enable
   [PE1-Vlan-interface30] quit
   

   # Configure IBGP, enable the peer's 6PE capabilities, and redistribute IPv6 direct and static routes.

   [PE1] bgp 65100
   [PE1-bgp] router-id 2.2.2.2
   [PE1-bgp] peer 3.3.3.3 as-number 65100
   [PE1-bgp] peer 3.3.3.3 connect-interface loopback 0
   [PE1-bgp] address-family ipv6
   [PE1-bgp-ipv6] import-route direct
   [PE1-bgp-ipv6] import-route static
   [PE1-bgp-ipv6] peer 3.3.3.3 enable
   [PE1-bgp-ipv6] peer 3.3.3.3 label-route-capability
   [PE1-bgp-ipv6] quit
   [PE1-bgp] quit
   

   # Configure a static route to CE 1.

   [PE1] ipv6 route-static 1::1 128 10::1
   

   # Configure OSPF for the ISP.

   [PE1] ospf
   [PE1-ospf-1] area 0
   [PE1-ospf-1-area-0.0.0.0] network 2.2.2.2 0.0.0.0
   [PE1-ospf-1-area-0.0.0.0] network 1.1.0.0 0.0.255.255
   [PE1-ospf-1-area-0.0.0.0] quit
   [PE1-ospf-1] quit
   

3. Configure PE 2:

   # Enable LDP globally, and configure the LSP generation policy.

   <PE2> system-view
   [PE2] mpls lsr-id 3.3.3.3
   [PE2] mpls ldp
   [PE2-mpls-ldp] lsp-trigger all
   [PE2-mpls-ldp] quit
   

   # Enable MPLS and LDP on VLAN-interface 30.

   [PE2] interface vlan-interface 30
   [PE2-Vlan-interface30] mpls enable
   [PE2-Vlan-interface30] mpls ldp enable
   [PE2-Vlan-interface30] quit
   

   # Configure IBGP, enable the peer's 6PE capabilities, and redistribute IPv6 direct and static routes.

   [PE2] bgp 65100
   [PE2-bgp] router-id 3.3.3.3
   [PE2-bgp] peer 2.2.2.2 as-number 65100
   [PE2-bgp] peer 2.2.2.2 connect-interface loopback 0
   [PE2-bgp] address-family ipv6
   [PE2-bgp-ipv6] import-route direct
   [PE2-bgp-ipv6] import-route static
   [PE2-bgp-ipv6] peer 2.2.2.2 enable
   [PE2-bgp-ipv6] peer 2.2.2.2 label-route-capability
   [PE2-bgp-ipv6] quit
   [PE2-bgp] quit
   

   # Configure the static route to CE 2.

   [PE2] ipv6 route-static 4::4 128 20::1
   

   # Configure OSPF for the ISP.

   [PE2] ospf
   [PE2-ospf-1] area 0
   [PE2-ospf-1-area-0.0.0.0] network 3.3.3.3 0.0.0.0
   [PE2-ospf-1-area-0.0.0.0] network 1.1.0.0 0.0.255.255
   [PE2-ospf-1-area-0.0.0.0] quit
   [PE2-ospf-1] quit
   

4. Configure a static route on CE 1, with PE 1 as the default next hop.

   <CE1> system-view
   [CE1] ipv6 route-static :: 0 10::2
   

5. Configure a static route on CE 2, with PE 2 as the default next hop.

   <CE2> system-view
   [CE2] ipv6 route-static :: 0 20::2
   

Display the IPv6 BGP routing tables on PE 1 and PE 2, and the output shows that each of them has two IPv6 network routes.

# Display the IPv6 BGP routing table on PE 1.

[PE1] display bgp routing-table ipv6

 Total number of routes: 5

 BGP local router ID is 2.2.2.2
 Status codes: * - valid, > - best, d - dampened, h - history,
               s - suppressed, S - stale, i - internal, e - external
               Origin: i - IGP, e - EGP, ? - incomplete

* >  Network : 1::1                                     PrefixLen : 128
     NextHop : 10::1                                    LocPrf    :
     PrefVal : 32768                                    OutLabel  : NULL
     MED     : 0
     Path/Ogn: ?

* >i Network : 4::4                                     PrefixLen : 128
     NextHop : ::FFFF:3.3.3.3                           LocPrf    : 100
     PrefVal : 0                                        OutLabel  : 1279
     MED     : 0
     Path/Ogn: ?

* >  Network : 10::                                     PrefixLen : 64
     NextHop : ::                                       LocPrf    :
     PrefVal : 32768                                    OutLabel  : NULL
     MED     : 0
     Path/Ogn: ?

* >  Network : 10::2                                    PrefixLen : 128
     NextHop : ::1                                      LocPrf    :
     PrefVal : 32768                                    OutLabel  : NULL
     MED     : 0
     Path/Ogn: ?

* >i Network : 20::                                     PrefixLen : 64
     NextHop : ::FFFF:3.3.3.3                           LocPrf    : 100
     PrefVal : 0                                        OutLabel  : 1278
     MED     : 0
     Path/Ogn: ?

# Verify that CE 1 can ping the IPv6 address 4::4 (loopback interface address) of CE 2. (Details not shown.)