VyOS BGP ipv6 unnumbered with extended nexthop

General infomration can be found in the BGP chapter.

Configuration

  • Router A:
set protocols bgp 65020 address-family ipv4-unicast redistribute connected
set protocols bgp 65020 address-family ipv6-unicast redistribute connected
set protocols bgp 65020 neighbor eth1 interface v6only
set protocols bgp 65020 neighbor eth1 interface v6only peer-group 'fabric'
set protocols bgp 65020 neighbor eth2 interface v6only
set protocols bgp 65020 neighbor eth2 interface v6only peer-group 'fabric'
set protocols bgp 65020 parameters bestpath as-path multipath-relax
set protocols bgp 65020 parameters bestpath compare-routerid
set protocols bgp 65020 parameters default no-ipv4-unicast
set protocols bgp 65020 parameters router-id '192.168.0.1'
set protocols bgp 65020 peer-group fabric address-family ipv4-unicast
set protocols bgp 65020 peer-group fabric address-family ipv6-unicast
set protocols bgp 65020 peer-group fabric capability extended-nexthop
set protocols bgp 65020 peer-group fabric remote-as 'external'
  • Router B:
set protocols bgp 65021 address-family ipv4-unicast redistribute connected
set protocols bgp 65021 address-family ipv6-unicast redistribute connected
set protocols bgp 65021 neighbor eth1 interface v6only
set protocols bgp 65021 neighbor eth1 interface v6only peer-group 'fabric'
set protocols bgp 65021 neighbor eth2 interface v6only
set protocols bgp 65021 neighbor eth2 interface v6only peer-group 'fabric'
set protocols bgp 65021 parameters bestpath as-path multipath-relax
set protocols bgp 65021 parameters bestpath compare-routerid
set protocols bgp 65021 parameters default no-ipv4-unicast
set protocols bgp 65021 parameters router-id '192.168.0.2'
set protocols bgp 65021 peer-group fabric address-family ipv4-unicast
set protocols bgp 65021 peer-group fabric address-family ipv6-unicast
set protocols bgp 65021 peer-group fabric capability extended-nexthop
set protocols bgp 65021 peer-group fabric remote-as 'external'

Results

  • Router A:
[email protected]:~$ show interfaces
Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down
Interface        IP Address                        S/L  Description
---------        ----------                        ---  -----------
eth0             62.104.XXX.XXX/24                 u/u
eth1             -                                 u/u
eth2             -                                 u/u
lo               127.0.0.1/8                       u/u
                 192.168.0.1/32
                 ::1/128
[email protected]:~$ show ip route
Codes: K - kernel route, C - connected, S - static, R - RIP,
       O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
       T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP,
       F - PBR, f - OpenFabric,
       > - selected route, * - FIB route

S>* 0.0.0.0/0 [210/0] via 62.104.XXX.XXX, eth0, 03:21:53
C>* 62.104.56.0/24 is directly connected, eth0, 03:21:53
C>* 192.168.0.1/32 is directly connected, lo, 03:21:56
B>* 192.168.0.2/32 [20/0] via fe80::a00:27ff:fe3b:7ed2, eth2, 00:05:07
  *                       via fe80::a00:27ff:fe7b:4000, eth1, 00:05:07
[email protected]:~$ ping 192.168.0.2
PING 192.168.0.2 (192.168.0.2) 56(84) bytes of data.
64 bytes from 192.168.0.2: icmp_seq=1 ttl=64 time=0.575 ms
64 bytes from 192.168.0.2: icmp_seq=2 ttl=64 time=0.628 ms
64 bytes from 192.168.0.2: icmp_seq=3 ttl=64 time=0.581 ms
64 bytes from 192.168.0.2: icmp_seq=4 ttl=64 time=0.682 ms
64 bytes from 192.168.0.2: icmp_seq=5 ttl=64 time=0.597 ms

--- 192.168.0.2 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4086ms
rtt min/avg/max/mdev = 0.575/0.612/0.682/0.047 ms
[email protected]:~$ show ip bgp summary

IPv4 Unicast Summary:
BGP router identifier 192.168.0.1, local AS number 65020 vrf-id 0
BGP table version 4
RIB entries 5, using 800 bytes of memory
Peers 2, using 41 KiB of memory
Peer groups 1, using 64 bytes of memory

Neighbor        V         AS MsgRcvd MsgSent   TblVer  InQ OutQ  Up/Down State/PfxRcd
eth1            4      65021      13      13        0    0    0 00:05:33            2
eth2            4      65021      13      14        0    0    0 00:05:29            2

Total number of neighbors 2
  • Router B:
[email protected]:~$ show interfaces
Codes: S - State, L - Link, u - Up, D - Down, A - Admin Down
Interface        IP Address                        S/L  Description
---------        ----------                        ---  -----------
eth0             62.104.XXX.XXX/24                 u/u
eth1             -                                 u/u
eth2             -                                 u/u
lo               127.0.0.1/8                       u/u
                 192.168.0.2/32
                 ::1/128
[email protected]:~$ show ip route
Codes: K - kernel route, C - connected, S - static, R - RIP,
       O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
       T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP,
       F - PBR, f - OpenFabric,
       > - selected route, * - FIB route

S>* 0.0.0.0/0 [210/0] via 62.104.XXX.XXX, eth0, 00:44:08
C>* 62.104.56.0/24 is directly connected, eth0, 00:44:09
B>* 192.168.0.1/32 [20/0] via fe80::a00:27ff:fe2d:205d, eth1, 00:06:18
  *                       via fe80::a00:27ff:fe93:e142, eth2, 00:06:18
C>* 192.168.0.2/32 is directly connected, lo, 00:44:11
[email protected]:~$ ping 192.168.0.1
PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.
64 bytes from 192.168.0.1: icmp_seq=1 ttl=64 time=0.427 ms
64 bytes from 192.168.0.1: icmp_seq=2 ttl=64 time=0.471 ms
64 bytes from 192.168.0.1: icmp_seq=3 ttl=64 time=0.782 ms
64 bytes from 192.168.0.1: icmp_seq=4 ttl=64 time=0.715 ms

--- 192.168.0.1 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3051ms
rtt min/avg/max/mdev = 0.427/0.598/0.782/0.155 ms
[email protected]:~$ show ip bgp summary
IPv4 Unicast Summary:
BGP router identifier 192.168.0.2, local AS number 65021 vrf-id 0
BGP table version 4
RIB entries 5, using 800 bytes of memory
Peers 2, using 41 KiB of memory
Peer groups 1, using 64 bytes of memory

Neighbor        V         AS MsgRcvd MsgSent   TblVer  InQ OutQ  Up/Down State/PfxRcd
eth1            4      65020      14      14        0    0    0 00:06:40            2
eth2            4      65020      14      14        0    0    0 00:06:37            2

Total number of neighbors 2