Date: Fri, 4 Dec 2015 22:01:20 +0700 From: Eugene Grosbein <eugen@grosbein.net> To: Nikos Vassiliadis <nvass@gmx.com>, FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: etherip (or gif) tunnel blues Message-ID: <5661AAC0.4000308@grosbein.net> In-Reply-To: <5660DC8B.1090309@gmx.com> References: <5660DC8B.1090309@gmx.com>
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On 04.12.2015 07:21, Nikos Vassiliadis wrote: > Hi, > > we use ETHERIP to connect two remote locations and we discovered > something that looks like a bug. A packet of specific size > cannot go through the tunnel. > > Correct behavior: >> root@prometheus:~ # ping -s 1450 10.65.0.1 >> PING 10.65.0.1 (10.65.0.1): 1450 data bytes >> 1458 bytes from 10.65.0.1: icmp_seq=0 ttl=64 time=0.302 ms >> 1458 bytes from 10.65.0.1: icmp_seq=1 ttl=64 time=0.267 ms >> 1458 bytes from 10.65.0.1: icmp_seq=2 ttl=64 time=0.275 ms >> 1458 bytes from 10.65.0.1: icmp_seq=3 ttl=64 time=0.274 ms >> ^C >> --- 10.65.0.1 ping statistics --- >> 4 packets transmitted, 4 packets received, 0.0% packet loss >> round-trip min/avg/max/stddev = 0.267/0.279/0.302/0.013 ms > > If size is reduced to 1449 then the problem appears: >> root@prometheus:~ # ping -s 1449 10.65.0.1 >> PING 10.65.0.1 (10.65.0.1): 1449 data bytes >> ^C >> --- 10.65.0.1 ping statistics --- >> 7 packets transmitted, 0 packets received, 100.0% packet loss You should show output of ifconfig for your gif and bridge interfaces and obtain tcpdump output for them at sending and receiving side.
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