Or maybe you reach that ipv4 directly, and that ipv6 via a router, somehow Check your routing table and neighbor table On 27/10/2017 16:02, Wido den Hollander wrote: > >> Op 27 oktober 2017 om 14:22 schreef Félix Barbeira <fbarbeira@xxxxxxxxx>: >> >> >> Hi, >> >> I'm trying to configure a ceph cluster using IPv6 only but I can't enable >> jumbo frames. I made the definition on the >> 'interfaces' file and it seems like the value is applied but when I test it >> looks like only works on IPv4, not IPv6. >> >> It works on IPv4: >> >> root@ceph-node01:~# ping -c 3 -M do -s 8972 ceph-node02 >> >> PING ceph-node02 (x.x.x.x) 8972(9000) bytes of data. >> 8980 bytes from ceph-node02 (x.x.x.x): icmp_seq=1 ttl=64 time=0.474 ms >> 8980 bytes from ceph-node02 (x.x.x.x): icmp_seq=2 ttl=64 time=0.254 ms >> 8980 bytes from ceph-node02 (x.x.x.x): icmp_seq=3 ttl=64 time=0.288 ms >> > > Verify with Wireshark/tcpdump if it really sends 9k packets. I doubt it. > >> --- ceph-node02 ping statistics --- >> 3 packets transmitted, 3 received, 0% packet loss, time 2000ms >> rtt min/avg/max/mdev = 0.254/0.338/0.474/0.099 ms >> >> root@ceph-node01:~# >> >> But *not* in IPv6: >> >> root@ceph-node01:~# ping6 -c 3 -M do -s 8972 ceph-node02 >> PING ceph-node02(x:x:x:x:x:x:x:x) 8972 data bytes >> ping: local error: Message too long, mtu=1500 >> ping: local error: Message too long, mtu=1500 >> ping: local error: Message too long, mtu=1500 >> > > Like Ronny already mentioned, check the switches and the receiver. There is a 1500 MTU somewhere configured. > > Wido > >> --- ceph-node02 ping statistics --- >> 4 packets transmitted, 0 received, +4 errors, 100% packet loss, time 3024ms >> >> root@ceph-node01:~# >> >> >> >> root@ceph-node01:~# ifconfig >> eno1 Link encap:Ethernet HWaddr 24:6e:96:05:55:f8 >> inet6 addr: 2a02:x:x:x:x:x:x:x/64 Scope:Global >> inet6 addr: fe80::266e:96ff:fe05:55f8/64 Scope:Link >> UP BROADCAST RUNNING MULTICAST *MTU:9000* Metric:1 >> RX packets:633318 errors:0 dropped:0 overruns:0 frame:0 >> TX packets:649607 errors:0 dropped:0 overruns:0 carrier:0 >> collisions:0 txqueuelen:1000 >> RX bytes:463355602 (463.3 MB) TX bytes:498891771 (498.8 MB) >> >> 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:65536 Metric:1 >> RX packets:127420 errors:0 dropped:0 overruns:0 frame:0 >> TX packets:127420 errors:0 dropped:0 overruns:0 carrier:0 >> collisions:0 txqueuelen:1 >> RX bytes:179470326 (179.4 MB) TX bytes:179470326 (179.4 MB) >> >> root@ceph-node01:~# >> >> root@ceph-node01:~# cat /etc/network/interfaces >> # This file describes network interfaces avaiulable on your system >> # and how to activate them. For more information, see interfaces(5). >> >> source /etc/network/interfaces.d/* >> >> # The loopback network interface >> auto lo >> iface lo inet loopback >> >> # The primary network interface >> auto eno1 >> iface eno1 inet6 auto >> post-up ifconfig eno1 mtu 9000 >> root@ceph-node01:# >> >> >> Please help! >> >> -- >> Félix Barbeira. >> _______________________________________________ >> ceph-users mailing list >> ceph-users@xxxxxxxxxxxxxx >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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