Ronald, are you seeing the same large packet MTU's?
r...@hardy:~# ip -6 r s default
default via 2607:f3d0:0:4::1 dev eth0 metric 1 expires -1183414sec mtu 1500
advmss 1440 hoplimit 4294967295
What appears to be happening to me is that programs (scp, ftp) are using the
MTU from Lo0 for ipv6 packets. Thus I get packets with sizes much larger then
MTU
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:1070 errors:0 dropped:0 overruns:0 frame:0
TX packets:1070 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:79968 (78.0 KB) TX bytes:79968 (78.0 KB)
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TCP uses wrong MTU/MSS size for IPv6
https://bugs.launchpad.net/bugs/254622
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