Cellular Network Infrastructure » Core Network (CN) » OsmoGGSN (former OpenGGSN)

comparing the two pcap files of old (passing) and new (failing) tests, it can be seen that in the old (passing) pcap, we have "ICMPv6 destination unreachable" for each ICMPv6 echo request that is sent.

In the new (failing) case, no such messages are received (presumably as we now have a default route that routes the packets somewhere?).

Indeed, we are sending an ICMP echo req, and expect to either receive a response, or an ICMPv6 error. But now with the default route in place, we get neither:

21:50:54.125647 mtc GGSN_Tests.ttcn:738 Start timer T_default: 3 s
21:50:57.127863 mtc GGSN_Tests.ttcn:762 Timeout T_default: 3 s
21:50:57.127997 mtc GGSN_Tests.ttcn:763 Timeout waiting for ICMP6 ({
    echoReply := {
        typeField := 129,
        code := 0,
        checksum := ?,
        identifier := ?,
        sequenceNr := ?,
        data := *
    }
}, {
    destinationUnreachable := {
        typeField := 1,
        code := ?,
        checksum := ?,
        unused := ?,
        originalIpMsg := ?
    }
})
21:50:57.128263 mtc GGSN_Tests.ttcn:764 setverdict(fail): pass -> fail

https://gerrit.osmocom.org/c/docker-playground/+/19672 fixes the problem

patch merged