Because after enqueueing, the buffers are dropped with error “successfully
enqueued”. Check “sh error”.
Florin
> On Mar 17, 2018, at 1:03 AM, Shashi Kant Singh <sksi...@altiostar.com> wrote:
>
> Hi
>
> I changed the vcl_test_server / client from TCP to UDP.
>
> Question: Why does the UDP enqueued marked as error_drop?
>
>
>
> I get the following in my setup:
>
>
> how interface
> Name Idx State Counter
> Count
> GigabitEthernet0/7/0 1 up rx packets
> 6
> rx bytes
> 488
> tx packets
> 6
> tx bytes
> 472
> drops
> 6
> ip4
> 6
> GigabitEthernet0/8/0 2 up
> local0 0 down
> vpp# vpp# show interface
>
> SERVER:
> [root@vbbubng6-shashi-2 vpp]#
> ./build-root/build-vpp-native/vpp/vcl_test_server 5682
>
> SERVER: Waiting for a client to connect on port 5682...
> SERVER: Got a connection -- fd = 2 (0x00000002)!
> SERVER: Got a connection -- fd = 3 (0x00000003)!
> SERVER (fd 3): RX (14 bytes) - '12345'
> SERVER (fd 3): TX (6 bytes) - '12345'
> SERVER (fd 3): RX (14 bytes) - '12345'
> SERVER (fd 3): TX (6 bytes) - '12345'
>
> epoll_wait() timeout!
>
>
> CLIENT:
> ------------
> Type some characters and hit <return>
> ('#H' for help): 12345
>
> CLIENT: Received 52 ffffffce, fffffffa , ffffffed , fffffffe 1 0, 0 , 0 ,
> ffffffff ffffffff ffffffff, ffffffff ,
> CLIENT (fd 4): TX (6 bytes) - '12345'
> CLIENT (fd 4): RX (6 bytes) - '12345'
>
> Type some characters and hit <return>
> ('#H' for help):
>
>
> Packet 3
>
> 16:04:08:600447: dpdk-input
> GigabitEthernet0/7/0 rx queue 0
> buffer 0x2eef: current data 14, length 80, free-list 0, clone-count 0,
> totlen-nifb 0, trace 0x2
> l4-cksum-computed l4-cksum-correct l2-hdr-offset 0
> l3-hdr-offset 14
> PKT MBUF: port 0, nb_segs 1, pkt_len 94
> buf_len 2176, data_len 94, ol_flags 0x0, data_off 128, phys_addr
> 0x266bbc40
> packet_type 0x0 l2_len 0 l3_len 0 outer_l2_len 0 outer_l3_len 0
> IP4: fa:16:3e:59:76:83 -> fa:16:3e:1c:60:fe
> UDP: 192.168.210.30 -> 192.168.220.30
> tos 0x00, ttl 64, length 80, checksum 0xc703
> fragment id 0x440b, flags DONT_FRAGMENT
> UDP: 50016 -> 5682
> length 60, checksum 0xd9f8
> 16:04:08:600460: ip4-input
> UDP: 192.168.210.30 -> 192.168.220.30
> tos 0x00, ttl 64, length 80, checksum 0xc703
> fragment id 0x440b, flags DONT_FRAGMENT
> UDP: 50016 -> 5682
> length 60, checksum 0xd9f8
> 16:04:08:600469: ip4-lookup
> fib 0 dpo-idx 6 flow hash: 0x00000000
> UDP: 192.168.210.30 -> 192.168.220.30
> tos 0x00, ttl 64, length 80, checksum 0xc703
> fragment id 0x440b, flags DONT_FRAGMENT
> UDP: 50016 -> 5682
> length 60, checksum 0xd9f8
> 16:04:08:600472: ip4-local
> UDP: 192.168.210.30 -> 192.168.220.30
> tos 0x00, ttl 64, length 80, checksum 0xc703
> fragment id 0x440b, flags DONT_FRAGMENT
> UDP: 50016 -> 5682
> length 60, checksum 0xd9f8
> 16:04:08:600475: ip4-udp-lookup
> UDP: src-port 50016 dst-port 5682
> 16:04:08:600477: udp4-input
> UDP_INPUT: connection 3, disposition 4, thread 2
> 16:04:08:600484: error-drop
> udp4-input: UDP packets enqueued
>
>
>
>
