[PS, I'm not subscribed to netdev, CC would be nice - is there any way
to get subscribed?]
Hi
I mailed you guys a little while ago on the "unable to use
SOMENETWORK::0000 as a nexthop gateway" bug in 2.4.21-pre/rc a while
ago. It is still present in 2.4.21, rendering the "first" /128 of a
arbitrary prefixlen unusable - :0000. This is especially bad with /127
tunnels, rendering :0000 and :0001 unusable). But! There is one more
oddity in 2.4.21, not present in 2.4.20..
The lower part of a /127 network is somehow, strangely routed to lo -
observe..
* ed-gw1 configuration
running 2.4.21-s2 (internal vendor tree with megaraid, md and some
netdrv updates, but pristine behaves the same)
* relevant routing info
2001:730:3::1:2a/127 via :: dev aorta proto kernel metric 256 mtu 1480
advmss 1420
2a is Aorta's end of the /127, 2b is our end.
from a host behind some routers:
root@kvass ~ # traceroute6 2001:730:3::1:2a
traceroute to 2001:730:3::1:2a (2001:730:3::1:2a) from 2001:730:f:3::2, 30 hops
max, 16 byte packets
1 slask-fe-1.ws.pasop.tomt.net (2001:730:f:3::1) 2.46 ms 0.543 ms 0.455 ms
2 casablanca-fe-1.co.pasop.tomt.net (2001:730:f:7::1) 0.941 ms 0.622 ms
0.567 ms
3 ed-gw1-si0-0.sand-osl.skjellin.net (2001:730:f:ffff::) 6.56 ms 5.177 ms
5.087 ms
^-- hmmm. this was supposed to end at Aorta, not here.
root@kvass ~ # traceroute6 2001:730:3::1:2b
traceroute to 2001:730:3::1:2b (2001:730:3::1:2b) from 2001:730:f:3::2, 30 hops
max, 16 byte packets
1 slask-fe-1.ws.pasop.tomt.net (2001:730:f:3::1) 0.797 ms 0.533 ms 0.455 ms
2 casablanca-fe-1.co.pasop.tomt.net (2001:730:f:7::1) 1.077 ms 0.623 ms
0.558 ms
3 skjellin-gw1.no.ipv6.aorta.net (2001:730:3::1:2b) 5.068 ms 18.271 ms
5.182 ms
^-- alright!
from ed-gw1:
root@ed-gw1 ~ # traceroute6 2001:730:3::1:2a
traceroute to 2001:730:3::1:2a (2001:730:3::1:2a) from ::1, 30 hops max, 16
byte packets
1 ip6-localhost (::1) 0.108 ms 0.099 ms 0.033 ms
^-- ehem.. this isn't Aorta, is it?
root@ed-gw1 ~ # traceroute6 2001:730:3::1:2b
traceroute to 2001:730:3::1:2b (2001:730:3::1:2b) from ::1, 30 hops max, 16
byte packets
1 skjellin-gw1.no.ipv6.aorta.net (2001:730:3::1:2b) 0.101 ms 0.089 ms
0.103 ms
^-- alright!
--
Mvh,
André Tomt
andre@xxxxxxxxxxx
|