Ping bgp ipv6 link local address

With the feature of "BGP IPv6 link-local peering support", you can establish the bgp peering via ipv6 link-local address. To check the underlying reachability, we can use linux kernel command - ping6

For example,

interface Vlan4001
   vrf forwarding vrf3_BGP_v6P_v6Ll
   ipv6 address fe80::1/64 link-local
!
router bgp 65100
   vrf vrf3_BGP_v6P_v6Ll
      rd 65000:3
      bgp default ipv4-unicast
      bgp default ipv4-unicast transport ipv6
      bgp default ipv6-unicast
      neighbor fe80::100%Vl4001 remote-as 65500

bn303#bash sudo ip netns exec ns-vrf3_BGP_v6P_v6Ll ping6 -I vlan4001 fe80::100
PING fe80::100(fe80::100) from fe80::1%vlan4001 vlan4001: 56 data bytes
64 bytes from fe80::100%vlan4001: icmp_seq=1 ttl=64 time=0.483 ms
64 bytes from fe80::100%vlan4001: icmp_seq=2 ttl=64 time=0.238 ms
.....


Please note that this peering is under VRF, so you have to use the namespace command - "ip netns..."