Hi Neale, Thanks a lot, it really helped!
But I used: enable ip6 interface memif0/0 in addition to: set int unnumbered memif0/0 use loop0 Otherwise, ping from vpp2 to vpp1 doesn't work. So, I moved on. *Next problem* If I use unnumbered IPv6 interface with a custom vrf table - ping doesn't work. *Configuration:* *vpp1:* > > > > create interface memif id 0 master > set int ip address memif0/0 fc00::1/120 > set int state memif0/0 up > > *vpp2:* > > > > create loopback interface > create interface memif id 0 slave > ip6 table add 1 > set int ip6 table loop0 1 > set int ip6 table memif0/0 1 > set int unnumbered memif0/0 use loop0 > enable ip6 interface memif0/0 > ip route add fc00::1/128 via memif0/0 > set int state memif0/0 up > set int ip address loop0 fc00::2/120 > set int state loop0 up > > trace add memif-input 10 vpp1: ping fc00::2 Traces: Packet 1 00:00:28:149948: memif-input memif: hw_if_index 2 next-index 4 slot: ring 0 00:00:28:149959: ethernet-input IP6: 02:fe:92:6a:0b:42 -> 33:33:00:00:00:01 00:00:28:149965: ip6-input ICMP6: fe80::fe:92ff:fe6a:b42 -> ff02::1 tos 0x00, flow label 0x0, hop limit 255, payload length 32 ICMP router_advertisement checksum 0xd248 00:00:28:149969: ip6-mfib-forward-lookup fib 0 entry 11 00:00:28:149973: ip6-mfib-forward-rpf entry 11 itf 2 flags Accept, 00:00:28:149975: ip6-replicate replicate: 8 via [@1]: dpo-receive 00:00:28:149979: ip6-local fib:1 adj:8 flow:0 ICMP6: fe80::fe:92ff:fe6a:b42 -> ff02::1 tos 0x00, flow label 0x0, hop limit 255, payload length 32 ICMP router_advertisement checksum 0xd248 00:00:28:149985: ip6-icmp-input ICMP6: fe80::fe:92ff:fe6a:b42 -> ff02::1 tos 0x00, flow label 0x0, hop limit 255, payload length 32 ICMP router_advertisement checksum 0xd248 00:00:28:149987: icmp6-router-advertisement ICMP6: fe80::fe:92ff:fe6a:b42 -> ff02::1 tos 0x00, flow label 0x0, hop limit 255, payload length 32 ICMP router_advertisement checksum 0xd248 00:00:28:149993: ip6-drop fib:1 adj:8 flow:0 ICMP6: fe80::fe:92ff:fe6a:b42 -> ff02::1 tos 0x00, flow label 0x0, hop limit 255, payload length 32 ICMP router_advertisement checksum 0xd248 00:00:28:149995: error-drop rx:memif0/0 00:00:28:149999: drop ip6-icmp-input: valid packets Packet 2 00:00:28:875034: memif-input memif: hw_if_index 2 next-index 4 slot: ring 0 00:00:28:875040: ethernet-input IP6: 02:fe:92:6a:0b:42 -> 33:33:ff:00:00:02 00:00:28:875047: ip6-input ICMP6: fc00::1 -> ff02::1:ff00:2 tos 0x00, flow label 0x0, hop limit 255, payload length 32 ICMP neighbor_solicitation checksum 0xe0ed target address fc00::2 00:00:28:875049: ip6-mfib-forward-lookup fib 0 entry 9 00:00:28:875053: ip6-mfib-forward-rpf entry 9 itf 2 flags Accept, 00:00:28:875059: ip6-replicate replicate: 6 via [@1]: dpo-receive 00:00:28:875063: ip6-local fib:1 adj:6 flow:0 ICMP6: fc00::1 -> ff02::1:ff00:2 tos 0x00, flow label 0x0, hop limit 255, payload length 32 ICMP neighbor_solicitation checksum 0xe0ed target address fc00::2 00:00:28:875068: ip6-icmp-input ICMP6: fc00::1 -> ff02::1:ff00:2 tos 0x00, flow label 0x0, hop limit 255, payload length 32 ICMP neighbor_solicitation checksum 0xe0ed target address fc00::2 00:00:28:875071: icmp6-neighbor-solicitation ICMP6: fc00::1 -> ff02::1:ff00:2 tos 0x00, flow label 0x0, hop limit 255, payload length 32 ICMP neighbor_solicitation checksum 0xe0ed target address fc00::2 00:00:28:875076: ip6-drop fib:1 adj:6 flow:0 ICMP6: fc00::1 -> ff02::1:ff00:2 tos 0x00, flow label 0x0, hop limit 255, payload length 32 ICMP neighbor_solicitation checksum 0xe0ed target address fc00::2 00:00:28:875078: error-drop rx:memif0/0 00:00:28:875079: drop ip6-icmp-input: neighbor solicitations from source not on link We can see an error: neighbor solicitations from source not on link Additionally, if it helps: DBGvpp# show mfib entry FIB Entries: 0@(*, 0.0.0.0/0): flags:Drop, Interfaces: multicast-ip4-chain [@0]: dpo-drop ip4 1@(*, 224.0.0.1/32): Interfaces: multicast-ip4-chain [@1]: dpo-replicate: [index:0 buckets:1 flags:[has-local ] to:[0:0]] [0] [@1]: dpo-receive 2@(*, 224.0.0.2/32): Interfaces: multicast-ip4-chain [@1]: dpo-replicate: [index:1 buckets:1 flags:[has-local ] to:[0:0]] [0] [@1]: dpo-receive 3@(*, ::/0): flags:Drop, Interfaces: multicast-ip6-chain [@0]: dpo-drop ip6 4@(*, ff02::1:ff00:0/104): Interfaces: multicast-ip6-chain [@1]: dpo-replicate: [index:2 buckets:1 flags:[has-local ] to:[0:0]] [0] [@1]: dpo-receive 5@(*, ff02::2/128): Interfaces: multicast-ip6-chain [@1]: dpo-replicate: [index:3 buckets:1 flags:[has-local ] to:[0:0]] [0] [@1]: dpo-receive 6@(*, ff02::1/128): Interfaces: multicast-ip6-chain [@1]: dpo-replicate: [index:4 buckets:1 flags:[has-local ] to:[0:0]] [0] [@1]: dpo-receive 7@(*, ff02::16/128): Interfaces: multicast-ip6-chain [@1]: dpo-replicate: [index:5 buckets:1 flags:[has-local ] to:[0:0]] [0] [@1]: dpo-receive 8@(*, ::/0): flags:Drop, Interfaces: multicast-ip6-chain [@0]: dpo-drop ip6 9@(*, ff02::1:ff00:0/104): Interfaces: memif0/0: Accept, loop0: Accept, multicast-ip6-chain [@1]: dpo-replicate: [index:6 buckets:1 flags:[has-local ] to:[5:360]] [0] [@1]: dpo-receive 10@(*, ff02::2/128): Interfaces: memif0/0: Accept, loop0: Accept, multicast-ip6-chain [@1]: dpo-replicate: [index:7 buckets:1 flags:[has-local ] to:[0:0]] [0] [@1]: dpo-receive 11@(*, ff02::1/128): Interfaces: memif0/0: Accept, loop0: Accept, multicast-ip6-chain [@1]: dpo-replicate: [index:8 buckets:1 flags:[has-local ] to:[8:576]] [0] [@1]: dpo-receive 12@(*, ff02::16/128): Interfaces: memif0/0: Accept, loop0: Accept, multicast-ip6-chain [@1]: dpo-replicate: [index:9 buckets:1 flags:[has-local ] to:[1:136]] [0] [@1]: dpo-receive Do you have any thoughts on this? Thank you
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