Hi neale, I set the memif0/2 as the arp proxy, with addr: 10.10.2.0/24. It goes to "ip4-flow-classify" but becomes misses...
vpp# create tap id 0 tap0 vpp# create interface memif id 2 slave vpp# create interface memif id 3 slave vpp# set interface state memif0/2 up vpp# set interface state memif0/3 up vpp# set int state tap0 up vpp# classify table mask hex 00000000000000ff0000ffffffffffffffffffff000000000000000000000000 buckets 16 vpp# classify session opaque-index 0 table-index 0 match hex 000000000000000600000a0a02010a0a0202300c000000000000000000000000 action set-ip4-fib-id 100 vpp# classify session opaque-index 1 table-index 0 match hex 000000000000000600000a0a02010a0a0202306f000000000000000000000000 action set-ip4-fib-id 200 vpp# ip route add 10.10.2.2/32 table 100 via memif0/3 vpp# ip route add 10.10.2.2/32 table 200 via tap0 vpp# ip route add 10.10.2.1/32 via memif0/2 vpp# ip route add 10.10.2.0/24 via classify 0 vpp# set flow classify interface memif0/2 ip4-table 0 vpp# set int ip address memif0/2 10.10.2.0/24 vpp# set ip arp proxy 10.10.2.1 - 10.10.2.11 vpp# set interface proxy-arp memif0/2 enable vpp# trace add memif-input 20 vpp# # ip addr add dev tap0 10.10.2.2/24 **** Before test vpp# show err Count Node Reason 8 arp-proxy ARP replies sent 117 ethernet-input no error **** After test vpp# show err Count Node Reason 9 arp-proxy ARP replies sent 6 ip4-glean ARP requests sent 6 *ip4-flow-classify Flow classify misses* 117 ethernet-input no error vpp# show trace ------------------- Start of thread 0 vpp_main ------------------- Packet 1 00:26:33:904177: memif-input memif: hw_if_index 2 next-index 4 slot: ring 0 00:26:33:904194: ethernet-input IP4: b2:5f:84:5e:0b:43 -> 02:fe:5f:e8:9a:43 00:26:33:904204: ip4-input TCP: 10.10.2.1 -> 10.10.2.2 tos 0x00, ttl 64, length 60, checksum 0xaa35 fragment id 0x7870, flags DONT_FRAGMENT TCP: 12399 -> 12345 seq. 0xdb5ba86d ack 0x00000000 flags 0x02 SYN, tcp header: 40 bytes window 29200, checksum 0x712e 00:26:33:913725: *ip4-flow-classify* FLOW_CLASSIFY: sw_if_index 2 next 1 table 0 offset -1 00:26:33:913764: ip4-lookup fib 0 dpo-idx 3 flow hash: 0x00000000 TCP: 10.10.2.1 -> 10.10.2.2 tos 0x00, ttl 64, length 60, checksum 0xaa35 fragment id 0x7870, flags DONT_FRAGMENT TCP: 12399 -> 12345 seq. 0xdb5ba86d ack 0x00000000 flags 0x02 SYN, tcp header: 40 bytes window 29200, checksum 0x712e 00:26:33:948054: ip4-glean TCP: 10.10.2.1 -> 10.10.2.2 tos 0x00, ttl 64, length 60, checksum 0xaa35 fragment id 0x7870, flags DONT_FRAGMENT TCP: 12399 -> 12345 seq. 0xdb5ba86d ack 0x00000000 flags 0x02 SYN, tcp header: 40 bytes window 29200, checksum 0x712e 00:26:33:948069: memif0/2-output memif0/2 ARP: 02:fe:5f:e8:9a:43 -> ff:ff:ff:ff:ff:ff request, type ethernet/IP4, address size 6/4 02:fe:5f:e8:9a:43/10.10.2.0 -> 00:00:00:00:00:00/10.10.2.2 00:26:33:948072: error-drop rx:memif0/2 00:26:33:948076: drop ip4-glean: ARP requests sent Packet 2 00:26:34:893852: memif-input memif: hw_if_index 2 next-index 4 slot: ring 0 00:26:34:893859: ethernet-input IP4: b2:5f:84:5e:0b:43 -> 02:fe:5f:e8:9a:43 00:26:34:893863: ip4-input TCP: 10.10.2.1 -> 10.10.2.2 tos 0x00, ttl 64, length 60, checksum 0xaa34 fragment id 0x7871, flags DONT_FRAGMENT TCP: 12399 -> 12345 seq. 0xdb5ba86d ack 0x00000000 flags 0x02 SYN, tcp header: 40 bytes window 29200, checksum 0x6d44 00:26:34:893867: ip4-flow-classify FLOW_CLASSIFY: sw_if_index 2 next 1 table 0 offset -1 00:26:34:893873: ip4-lookup fib 0 dpo-idx 3 flow hash: 0x00000000 TCP: 10.10.2.1 -> 10.10.2.2 tos 0x00, ttl 64, length 60, checksum 0xaa34 fragment id 0x7871, flags DONT_FRAGMENT TCP: 12399 -> 12345 seq. 0xdb5ba86d ack 0x00000000 flags 0x02 SYN, tcp header: 40 bytes window 29200, checksum 0x6d44 00:26:34:893876: ip4-glean TCP: 10.10.2.1 -> 10.10.2.2 tos 0x00, ttl 64, length 60, checksum 0xaa34 fragment id 0x7871, flags DONT_FRAGMENT TCP: 12399 -> 12345 seq. 0xdb5ba86d ack 0x00000000 flags 0x02 SYN, tcp header: 40 bytes window 29200, checksum 0x6d44 00:26:34:893879: memif0/2-output memif0/2 ARP: 02:fe:5f:e8:9a:43 -> ff:ff:ff:ff:ff:ff request, type ethernet/IP4, address size 6/4 02:fe:5f:e8:9a:43/10.10.2.0 -> 00:00:00:00:00:00/10.10.2.2 00:26:34:893880: error-drop rx:memif0/2 00:26:34:893883: drop ip4-glean: ARP requests sent Packet 3 00:26:36:921068: memif-input memif: hw_if_index 2 next-index 4 slot: ring 0 00:26:36:921077: ethernet-input IP4: b2:5f:84:5e:0b:43 -> 02:fe:5f:e8:9a:43 00:26:36:921081: ip4-input TCP: 10.10.2.1 -> 10.10.2.2 tos 0x00, ttl 64, length 60, checksum 0xaa33 fragment id 0x7872, flags DONT_FRAGMENT TCP: 12399 -> 12345 seq. 0xdb5ba86d ack 0x00000000 flags 0x02 SYN, tcp header: 40 bytes window 29200, checksum 0x6564 00:26:36:921085: ip4-flow-classify FLOW_CLASSIFY: sw_if_index 2 next 1 table 0 offset -1 00:26:36:921091: ip4-lookup fib 0 dpo-idx 3 flow hash: 0x00000000 TCP: 10.10.2.1 -> 10.10.2.2 tos 0x00, ttl 64, length 60, checksum 0xaa33 fragment id 0x7872, flags DONT_FRAGMENT TCP: 12399 -> 12345 seq. 0xdb5ba86d ack 0x00000000 flags 0x02 SYN, tcp header: 40 bytes window 29200, checksum 0x6564 00:26:36:921094: ip4-glean TCP: 10.10.2.1 -> 10.10.2.2 tos 0x00, ttl 64, length 60, checksum 0xaa33 fragment id 0x7872, flags DONT_FRAGMENT TCP: 12399 -> 12345 seq. 0xdb5ba86d ack 0x00000000 flags 0x02 SYN, tcp header: 40 bytes window 29200, checksum 0x6564 00:26:36:921096: memif0/2-output memif0/2 ARP: 02:fe:5f:e8:9a:43 -> ff:ff:ff:ff:ff:ff request, type ethernet/IP4, address size 6/4 02:fe:5f:e8:9a:43/10.10.2.0 -> 00:00:00:00:00:00/10.10.2.2 00:26:36:921097: error-drop rx:memif0/2 00:26:36:921100: drop ip4-glean: ARP requests sent Packet 4 00:26:38:864434: memif-input memif: hw_if_index 2 next-index 4 slot: ring 0 00:26:38:904356: ethernet-input ARP: b2:5f:84:5e:0b:43 -> 02:fe:5f:e8:9a:43 00:26:38:904369: arp-input request, type ethernet/IP4, address size 6/4 b2:5f:84:5e:0b:43/10.10.2.1 -> 00:00:00:00:00:00/10.10.2.2 00:26:38:904372: arp-reply request, type ethernet/IP4, address size 6/4 b2:5f:84:5e:0b:43/10.10.2.1 -> 00:00:00:00:00:00/10.10.2.2 00:26:38:904379: arp-proxy request, type ethernet/IP4, address size 6/4 b2:5f:84:5e:0b:43/10.10.2.1 -> 00:00:00:00:00:00/10.10.2.2 00:26:38:904384: memif0/2-output memif0/2 l2_hdr_offset_valid l3_hdr_offset_valid ARP: 02:fe:5f:e8:9a:43 -> b2:5f:84:5e:0b:43 reply, type ethernet/IP4, address size 6/4 02:fe:5f:e8:9a:43/10.10.2.2 -> b2:5f:84:5e:0b:43/10.10.2.1 vpp# show classify table verbose TableIdx Sessions NextTbl NextNode 0 9 -1 -1 Heap: total: 2.06M, used: 2.95K, free: 2.06M, trimmable: 2.06M nbuckets 16, skip 0 match 2 flag 0 offset 0 mask 00000000000000ff0000ffffffffffffffffffff000000000000000000000000 linear-search buckets 0 [2]: heap offset 1392, elts 2, normal 0: [1392]: next_index -1 advance 0 opaque 0 action 0 metadata 0 k: 000000000000005f00000b4308004500003c7874000000000000000000000000 hits 1, last_heard 1610.01 [6]: heap offset 1904, elts 2, normal 0: [1904]: next_index -1 advance 0 opaque 0 action 0 metadata 0 k: 000000000000005f00000b4308004500003c7871000000000000000000000000 hits 1, last_heard 1595.74 [7]: heap offset 2096, elts 2, normal 0: [2096]: next_index -1 advance 0 opaque 0 action 0 metadata 0 k: 000000000000005f00000b4308004500003c7872000000000000000000000000 hits 1, last_heard 1597.76 [9]: heap offset 1200, elts 2, normal 0: [1200]: next_index -1 advance 0 opaque 0 action 1 metadata 1 k: 000000000000000600000a0a02010a0a0202300c000000000000000000000000 *hits 0* , last_heard 0.00 [10]: heap offset 2864, elts 2, normal 0: [2864]: next_index -1 advance 0 opaque 0 action 0 metadata 0 k: 000000000000005f00000b4308004500003c7876000000000000000000000000 hits 1, last_heard 1660.04 [13]: heap offset 2288, elts 4, normal 0: [2288]: next_index -1 advance 0 opaque 1 action 1 metadata 2 k: 000000000000000600000a0a02010a0a0202306f000000000000000000000000 hits 0, last_heard 0.00 1: [2352]: next_index -1 advance 0 opaque 0 action 0 metadata 0 k: 000000000000005f00000b4308004500003c7870000000000000000000000000 hits 1, last_heard 1594.76 2: [2416]: next_index -1 advance 0 opaque 0 action 0 metadata 0 k: 000000000000005f00000b4308004500003c7873000000000000000000000000 hits 1, last_heard 1601.79 [15]: heap offset 2672, elts 2, normal 0: [2672]: next_index -1 advance 0 opaque 0 action 0 metadata 0 k: 000000000000005f00000b4308004500003c7875000000000000000000000000 hits 1, last_heard 1626.06 9 active elements 2 free lists 0 linear-search buckets Those HEX should be matched but still misses.... One more question, I don't quite understand about when I should use these ... Option A: set flow classify interface memif0/2 ip4-table 0 Option B: set int input acl intfc memif0/2 ip4-table 0 Thanks so much for help. Po
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