Hi All, I request your help on L2 Bridge in VPP. I wanted to know if we can selectively forward L2 packets to different interfaces on a bridge based on the ethernet address. For e.g there is one interface and 2 GTPU tunnels on a L2 bridge. I have added an entry into the L2 Fib table telling which interface to use for that particular ethernet address (ad:ef:ad:ef:de:ad ).
vpp# show l2fib verbose Mac-Address BD-Idx If-Idx BSN-ISN Age(min) static filter bvi Interface-Name ad:ef:ad:ef:de:ad 1 4 0/0 no - - - gtpu_tunnel1 01:00:5e:00:00:fb 1 2 0/1 - - - - gtpu_tunnel0 de:ad:be:ef:de:ad 1 2 0/1 - - - - gtpu_tunnel0 28:f1:0e:4e:c2:be 1 3 0/5 - - - - tap210 but when the packets arrive on tap210 they are sent to both tunnel1 and tunnel0 as well. I tried to switch off the flooding, in which case the packets are dropped saying L2 forward feature is not enabled. I request you to kindly let me know if this is possible at all to achieve. Thanks a lot, Here some information about setup. vpp# show bridge 3 detail BD-ID Index BSN Age(min) Learning U-Forwrd UU-Flood Flooding ARP-Term BVI-Intf 3 1 0 off on on flood on off N/A Interface If-idx ISN SHG BVI TxFlood VLAN-Tag-Rewrite tap210 3 5 0 - * none gtpu_tunnel0 2 1 0 - * none gtpu_tunnel1 4 3 0 - * none vpp# trace: Packet 1 01:08:35:178099: virtio-input virtio: hw_if_index 3 next-index 4 vring 0 len 1516 hdr: flags 0x00 gso_type 0x00 hdr_len 0 gso_size 0 csum_start 0 csum_offset 0 num_buffers 1 01:08:35:178102: ethernet-input IP4: 28:f1:0e:4e:c2:be -> ad:ef:ad:ef:de:ad 802.1q vlan 4 priority 4 01:08:35:178104: l2-input l2-input: sw_if_index 3 dst ad:ef:ad:ef:de:ad src 28:f1:0e:4e:c2:be 01:08:35:178106: l2-learn l2-learn: sw_if_index 3 dst ad:ef:ad:ef:de:ad src 28:f1:0e:4e:c2:be bd_index 1 01:08:35:178109: l2-flood l2-flood: sw_if_index 3 dst ad:ef:ad:ef:de:ad src 28:f1:0e:4e:c2:be bd_index 1 l2-flood: sw_if_index 3 dst ad:ef:ad:ef:de:ad src 28:f1:0e:4e:c2:be bd_index 1 01:08:35:178111: l2-output l2-output: sw_if_index 4 dst ad:ef:ad:ef:de:ad src 28:f1:0e:4e:c2:be data 81 00 80 04 08 00 45 00 05 da 19 bf l2-output: sw_if_index 2 dst ad:ef:ad:ef:de:ad src 28:f1:0e:4e:c2:be data 81 00 80 04 08 00 45 00 05 da 19 bf 01:08:35:178113: gtpu4-encap GTPU encap to gtpu_tunnel1 teid 7 GTPU encap to gtpu_tunnel0 teid 3 01:08:35:178115: ip4-load-balance fib 4 dpo-idx 1 flow hash: 0x00000005 UDP: 192.168.50.40 -> 192.168.50.10 tos 0x00, ttl 254, length 1552, checksum 0xd159 fragment id 0x0000 UDP: 11189 -> 2152 length 1532, checksum 0x0000 fib 2 dpo-idx 1 flow hash: 0x00000005 UDP: 192.168.50.40 -> 192.168.50.10 tos 0x00, ttl 254, length 1552, checksum 0xd159
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