Hi,

I recently tried to use the UDP echo server that is included in VPP. It seems 
to work fine when used by itself, but when I tried to use it on an IPsec 
interface (and my configuration looks good because ICMP is working with IPSec), 
an “unknown ip protocol” error occurs when the packet is decapsulated (I can 
see it with show errors). Packet is dropped by the receiver. In my opinion a 
checksum error could occur after decapsulating the packet.

Plus I get the following error when I try to use it WITHOUT IPsec on multiple 
cores.

1: 
/home/bfoucher/vpp_up_to_date/vpp/build-data/../src/vnet/session-apps/echo_server.c:153
 (echo_server_rx_callback) assertion `s→thread_index == thread_index' fails

These issues are quite annoying when it comes to benchmarking VPP. Do you have 
any suggestion in order to make these features work together?

Thanks,

Berenger

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