Hi, there is no multicast route to the local Forward ... solution: https://lists.fd.io/g/vpp-dev/topic/83103366#19478
PetrB. st 17. 11. 2021 v 4:08 odesílatel Wei Huang <wei.hu.hu...@oracle.com> napsal: > I am using the linux-cp plugin in VPP (v21.06) and run into issues with > multicast packet from OSPF. > I try to make FRR work with VPP. I created a lcp pair (ETH2-VPP2), ETH2 > directly connect to router using OSPF. > > FRR------VPP (192.168.100.5)----------Router (192.168.100.20) > VPP2 ETH2 ETH1 > > vppctl lcp create tn-eth2 host-if vpp2 netns t3-tap-ns > ip netns exec t3-tap-ns ip addr add 192.168.100.5/24 dev vpp2 > ip netns exec t3-tap-ns ip link set dev vpp2 up > > > When I do tshark on Router ETH1, I can see hello packets from both sides, > i.e. 192.168.100.5->224.0.0.5 and 192.168.100.20->224.0.0.5. > But when do tshark on VPP2, I can only see hello packets from > 192.168.100.5->224.0.0.5. Seems VPP didn't forward multicast packets to > VPP2. > When I do packet trace, this is what I got: > 01:21:34:796763: dpdk-input > tn-eth2 rx queue 0 > buffer 0x93b1f: current data 0, length 82, buffer-pool 0, ref-count 1, > totlen-nifb 0, trace handle 0x0 > ext-hdr-valid > l4-cksum-computed l4-cksum-correct > PKT MBUF: port 2, nb_segs 1, pkt_len 82 > buf_len 2176, data_len 82, ol_flags 0x0, data_off 128, phys_addr > 0xb20ec840 > packet_type 0x0 l2_len 0 l3_len 0 outer_l2_len 0 outer_l3_len 0 > rss 0x0 fdir.hi 0x0 fdir.lo 0x0 > IP4: fa:16:3f:a9:2c:cc -> 01:00:5e:00:00:05 > OSPF: 192.168.100.20 -> 224.0.0.5 > tos 0xc0, ttl 1, length 68, checksum 0xf102 dscp CS6 ecn NON_ECN > fragment id 0xc2dc > 01:21:34:796805: ethernet-input > frame: flags 0x1, hw-if-index 3, sw-if-index 3 > IP4: fa:16:3f:a9:2c:cc -> 01:00:5e:00:00:05 > 01:21:34:796836: ip4-input > OSPF: 192.168.100.20 -> 224.0.0.5 > tos 0xc0, ttl 1, length 68, checksum 0xf102 dscp CS6 ecn NON_ECN > fragment id 0xc2dc > 01:21:34:796842: ip4-mfib-forward-lookup > fib 0 entry 0 > 01:21:34:796846: ip4-mfib-forward-rpf > entry 0 itf -1 flags > 01:21:34:796847: ip4-drop > OSPF: 192.168.100.20 -> 224.0.0.5 > tos 0xc0, ttl 1, length 68, checksum 0xf102 dscp CS6 ecn NON_ECN > fragment id 0xc2dc > 01:21:34:796849: error-drop > rx:tn-eth2 > 01:21:34:796853: drop > ip4-input: Multicast RPF check failed > > Do I need to do anything special for multicast packets to be directed to > the TAP interface? > > Regards, > > Wei > > > > >
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