Hi Vyshakh,
A well placed call to:
ip_neighbor_learn_dp()
would do the job. Then some tests in test_ip6.py TestIPv6RD.
/neale
On 09/04/2020 07:42, "vpp-dev@lists.fd.io on behalf of Ole Troan"
<vpp-dev@lists.fd.io on behalf of otr...@employees.org> wrote:
Vyshakh,
That’s certainly what the RFC says.
Care to submit a patch?
Cheers
Ole
> On 9 Apr 2020, at 06:10, vyshakh krishnan via lists.fd.io
<vyshakh=rtbrick....@lists.fd.io> wrote:
>
>
> Hi,
>
> VPP is not learning the MAC address on receiving an RA. Even after
receiving multiple RAs from a neighbor, ping to the link local address of that
neighbor results in a NS/NA resulting in the drop of 1st ping packet. Is this
expected?
> Just like learning the MAC from NA/NS, why can't learning be triggered
for an RA?
>
> Packet 3
>
> 00:30:08:261191: memif-input
> memif: hw_if_index 1 next-index 4
> slot: ring 0
> 00:30:08:261208: ethernet-input
> frame: flags 0x1, hw-if-index 1, sw-if-index 1
> IP6: 7a:55:92:76:00:01 -> 33:33:00:00:00:01
> 00:30:08:261217: ip6-input
> ICMP6: fe80::7855:92ff:fe76:1 -> ff02::1
> tos 0x00, flow label 0x0, hop limit 255, payload length 32
> ICMP router_advertisement checksum 0xfc3d
> 00:30:08:261236: ip6-mfib-forward-lookup
> fib 0 entry 4
> 00:30:08:261246: ip6-mfib-forward-rpf
> entry 4 itf 1 flags Accept,
> 00:30:08:261250: ip6-replicate
> replicate: 2 via [@1]: dpo-receive
> 00:30:08:261255: ip6-local
> ICMP6: fe80::7855:92ff:fe76:1 -> ff02::1
> tos 0x00, flow label 0x0, hop limit 255, payload length 32
> ICMP router_advertisement checksum 0xfc3d
> 00:30:08:261279: ip6-icmp-input
> ICMP6: fe80::7855:92ff:fe76:1 -> ff02::1
> tos 0x00, flow label 0x0, hop limit 255, payload length 32
> ICMP router_advertisement checksum 0xfc3d
> 00:30:08:261288: icmp6-router-advertisement
> ICMP6: fe80::7855:92ff:fe76:1 -> ff02::1
> tos 0x00, flow label 0x0, hop limit 255, payload length 32
> ICMP router_advertisement checksum 0xfc3d
> 00:30:08:261299: ip6-drop
> ICMP6: fe80::7855:92ff:fe76:1 -> ff02::1
> tos 0x00, flow label 0x0, hop limit 255, payload length 32
> ICMP router_advertisement checksum 0xfc3d
> 00:30:08:261302: error-drop
> rx:memif11/11
> 00:30:08:261303: drop
> ip6-icmp-input: valid packets
>
> Packet 4
>
> 00:30:17:270341: memif-input
> memif: hw_if_index 1 next-index 4
> slot: ring 0
> 00:30:17:286366: ethernet-input
> frame: flags 0x1, hw-if-index 1, sw-if-index 1
> IP6: 7a:55:92:76:00:01 -> 33:33:00:00:00:01
> 00:30:17:286375: ip6-input
> ICMP6: fe80::7855:92ff:fe76:1 -> ff02::1
> tos 0x00, flow label 0x0, hop limit 255, payload length 32
> ICMP router_advertisement checksum 0xfc3d
> 00:30:17:286381: ip6-mfib-forward-lookup
> fib 0 entry 4
> 00:30:17:286388: ip6-mfib-forward-rpf
> entry 4 itf 1 flags Accept,
> 00:30:17:286392: ip6-replicate
> replicate: 2 via [@1]: dpo-receive
> 00:30:17:286396: ip6-local
> ICMP6: fe80::7855:92ff:fe76:1 -> ff02::1
> tos 0x00, flow label 0x0, hop limit 255, payload length 32
> ICMP router_advertisement checksum 0xfc3d
> 00:30:17:286404: ip6-icmp-input
> ICMP6: fe80::7855:92ff:fe76:1 -> ff02::1
> tos 0x00, flow label 0x0, hop limit 255, payload length 32
> ICMP router_advertisement checksum 0xfc3d
> 00:30:17:286407: icmp6-router-advertisement
> ICMP6: fe80::7855:92ff:fe76:1 -> ff02::1
> tos 0x00, flow label 0x0, hop limit 255, payload length 32
> ICMP router_advertisement checksum 0xfc3d
> 00:30:17:286415: ip6-drop
> ICMP6: fe80::7855:92ff:fe76:1 -> ff02::1
> tos 0x00, flow label 0x0, hop limit 255, payload length 32
> ICMP router_advertisement checksum 0xfc3d
> 00:30:17:286417: error-drop
> rx:memif11/11
> 00:30:17:286422: drop
> ip6-icmp-input: valid packets
>
> DBGvpp# ping fe80::7855:92ff:fe76:1 source memif-0/0/0/10
> 76 bytes from fe80::7855:92ff:fe76:1: icmp_seq=2 ttl=63 time=28.0089 ms
> 76 bytes from fe80::7855:92ff:fe76:1: icmp_seq=3 ttl=63 time=28.0221 ms
> 76 bytes from fe80::7855:92ff:fe76:1: icmp_seq=4 ttl=63 time=24.0218 ms
> 76 bytes from fe80::7855:92ff:fe76:1: icmp_seq=5 ttl=63 time=32.0252 ms
>
> Statistics: 5 sent, 4 received, 20% packet loss
> DBGvpp#
>
> Thanks
> Vyshakh
>
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