Hi Satish, 

What does “show app server” report?

Thanks,
Florin



> On Mar 29, 2018, at 3:14 PM, Satish <satish.f...@gmail.com> wrote:
> 
> Hi,
> 
> I am trying to use Host stack of VPP for UDP connection through VCL library. 
> Server application listen on port 7891.
> 
> But when i try to connect to this server, the connection is not successful 
> saying (no listener).
> 
> But the same app when i change to use TCP it works fine.
> 
> Below is the trace info and VPP version information. Could some one please 
> let me know what is
> the issue in this? Does any one tried with VCL for UDP before and succeeded?
> 
> Thanks & Regards,
> Satish.
> 
> 
> vpp# show trace 
> ------------------- Start of thread 0 vpp_main -------------------
> Packet 1
> 
> 00:52:47:772356: dpdk-input
>   GigabitEthernet0/8/0 rx queue 0
>   buffer 0x3333: current data 14, length 46, free-list 0, clone-count 0, 
> totlen-nifb 0, trace 0x0
>                  ext-hdr-valid 
>                  l4-cksum-computed l4-cksum-correct l2-hdr-offset 0 
> l3-hdr-offset 14 
>   PKT MBUF: port 0, nb_segs 1, pkt_len 60
>     buf_len 2176, data_len 60, ol_flags 0x0, data_off 128, phys_addr 
> 0x1f8ccd40
>     packet_type 0x0 l2_len 0 l3_len 0 outer_l2_len 0 outer_l3_len 0
>   IP4: 08:00:27:02:dd:ad -> 08:00:27:f9:67:0c
>   UDP: 172.28.128.5 -> 172.28.128.3
>     tos 0x00, ttl 64, length 37, checksum 0x38e9
>     fragment id 0xa99d, flags DONT_FRAGMENT
>   UDP: 37797 -> 7891
>     length 17, checksum 0x63da
> 00:52:47:772392: ip4-input
>   UDP: 172.28.128.5 -> 172.28.128.3
>     tos 0x00, ttl 64, length 37, checksum 0x38e9
>     fragment id 0xa99d, flags DONT_FRAGMENT
>   UDP: 37797 -> 7891
>     length 17, checksum 0x63da
> 00:52:47:772396: ip4-lookup
>   fib 0 dpo-idx 7 flow hash: 0x00000000
>   UDP: 172.28.128.5 -> 172.28.128.3
>     tos 0x00, ttl 64, length 37, checksum 0x38e9
>     fragment id 0xa99d, flags DONT_FRAGMENT
>   UDP: 37797 -> 7891
>     length 17, checksum 0x63da
> 00:52:47:772398: ip4-local
>     UDP: 172.28.128.5 -> 172.28.128.3
>       tos 0x00, ttl 64, length 37, checksum 0x38e9
>       fragment id 0xa99d, flags DONT_FRAGMENT
>     UDP: 37797 -> 7891
>       length 17, checksum 0x63da
> 00:52:47:772401: ip4-udp-lookup
>   UDP: src-port 37797 dst-port 7891 (no listener)
> 00:52:47:772406: ip4-icmp-error
>   UDP: 172.28.128.5 -> 172.28.128.3
>     tos 0x00, ttl 64, length 37, checksum 0x38e9
>     fragment id 0xa99d, flags DONT_FRAGMENT
>   UDP: 37797 -> 7891
>     length 17, checksum 0x63da
> 
> 
> 
> vpp# show version 
> vpp v18.04-rc0~482-gf6647e0 built by vagrant on localhost at Mon Mar 26 
> 23:54:12 PDT 2018
> 
> 
> 
> 

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