Hi,
We have an issue on our home proxy (opensips 2.4.6), when it receives 200 OK (over UDP) from our Freeswitch and the package size is higher than the MTU size , we sometimes get fragmentation of the UDP packets, but only the first part of the fragmented package is sent to our edge proxy. Is this a known issue or is it a OS bug? We have not yet spotted any pattern on this and in most cases bigger packets with MTU around 1600 bytes gets through without an issue. I can add that in the other direction in the normal request routes we don't have any issue at all can have packets > 2000 bytes without any issues. Does Opensips use IP_MTU_DISCOVER or how is fragmentation controlled and is it expected to have different behavior in reply routes vs other routes? We use Centos 7 in a virtual server environment. I was hoping someone can share some light on this strange issue. BR/Olle
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