[babel] v4-via-v6 with babeld
Juliusz Chroboczek <jch@irif.fr> Tue, 03 May 2022 18:05 UTC
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Date: Tue, 03 May 2022 20:05:43 +0200
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From: Juliusz Chroboczek <jch@irif.fr>
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Subject: [babel] v4-via-v6 with babeld
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A route across three IPv6-only nodes:
$ ip route show 10.0.0.2
10.0.0.2 via inet6 fe80::216:3eff:fe00:1 dev lxcbr0 proto babel onlink
Here's how it's logged by babeld:
10.0.0.2/32 from 0.0.0.0/0 metric 384 (384) refmetric 288 id 02:16:3e:ff:fe:9a:5e:22 seqno 36425 chan (255) age 15 via lxcbr0 neigh fe80::216:3eff:fe00:1 (installed)
Traceroute is a little confusing:
$ traceroute 10.0.0.2
traceroute to 10.0.0.2 (10.0.0.2), 30 hops max, 60 byte packets
1 192.0.0.8 (192.0.0.8) 0.079 ms 0.019 ms 0.014 ms
2 192.0.0.8 (192.0.0.8) 0.040 ms 0.023 ms 0.042 ms
3 192.0.0.8 (192.0.0.8) 0.061 ms 0.030 ms 0.030 ms
4 10.0.0.2 (10.0.0.2) 0.060 ms 0.040 ms 0.039 ms
PMTUD works fine (thanks to Toke):
19:58:47.402871 IP 192.168.0.27.60046 > 10.0.0.2.22: Flags [.], seq 33:1481, ack 33, win 502, options [nop,nop,TS val 917354570 ecr 1849974691], length 1448
19:58:47.402874 IP 192.168.0.27.60046 > 10.0.0.2.22: Flags [P.], seq 1481:1537, ack 33, win 502, options [nop,nop,TS val 917354570 ecr 1849974691], length 56
19:58:47.402906 IP 192.0.0.8 > 192.168.0.27: ICMP 10.0.0.2 unreachable - need to frag (mtu 1420), length 556
19:58:47.402919 IP 10.0.0.2.22 > 192.168.0.27.60046: Flags [.], ack 33, win 509, options [nop,nop,TS val 1849974692 ecr 917354569,nop,nop,sack 1 {1481:1537}], length 0
19:58:47.402934 IP 192.168.0.27.60046 > 10.0.0.2.22: Flags [.], seq 33:1401, ack 33, win 502, options [nop,nop,TS val 917354570 ecr 1849974692], length 1368
-- Juliusz
- [babel] v4-via-v6 with babeld Juliusz Chroboczek