Hi Chinmaya, Given that data is written to the listener’s fifo, I’ll guess vpp thinks it’s using non-connected udp sessions. Since you expect accepts to be coming, probably you’re missing an vppcom_session_attr VPPCOM_ATTR_SET_CONNECTED on the listener. See for instance here [1]. It could also be that the vcl lib your app is linked against is out of sync with vpp.
Let me know if that solves the issue. Regards, Florin [1] https://git.fd.io/vpp/tree/src/plugins/hs_apps/vcl/vcl_test_protos.c#n154 > On Jan 19, 2023, at 1:13 PM, Chinmaya Aggarwal <chinmaya.agar...@hsc.com> > wrote: > > Hi, > > We re-compiled VPP 22.10 by cherry picking the below commits:- > > udp: fix tx handling of non-connected sessions : > 15952b261f92959ca14cf6679efc318c12e90de6 > udp: support for disabling tx csum : f8ee39ff715ec713045af69da465ba4da8248212 > udp: explicit udp output node This allows for custom next node selection on > output. : 8c1be054b90f113aef3ae27b52d7389271ce91c3 > > But we are still facing the same issue that VCL is not able to accept UDP > connections and we are seeing rx full in "show session verbose". > > Is there anything else that we might be missing out on or can try? > > Thanks and Regards, > Chinmaya Agarwal. > > > > >
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