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After enabling debug isis packet-dump the output shows only a half of LSP, losing the second part. The screenshot shows FRR's dump on the left and Wireshark packet dump on the right, a red line highlights missed part of LSP
It works on FRR8, but I have to use FRR9, because of isisd: IS-IS over tunnel patch enabled on FRR9 only (could you please also clarify why it's available only in FRR9?)
Minimal lab should include 2FRRs with established adjacency between them. Then turn on debug isis packet-dump on the first FRR and change a link cost the second FRR
FRR1
interface eth1
ip address 20.168.13.1/24
ip router isis lab
ipv6 address 4ffe::192:168:13:1/127
ipv6 router isis lab
isis csnp-interval 600
isis hello-interval 10
isis network point-to-point
no isis hello padding
exit
!
router isis lab
net 49.0002.0200.1025.0002.00
exit
!
FRR2
!
interface eth1
ip address 20.168.13.3/24
ip router isis lab
ipv6 address 4ffe::192:168:13:3/127
ipv6 router isis lab
isis network point-to-point
exit
!
router isis lab
net 49.0002.0200.1001.0003.00
exit
!
FRR1
debug isis packet-dump
FRR2
conf t
int eth1
isis metric cost 11
To get the lab quickly, I can suggest to use containerlab, the topology is defined here
Expected behavior
I expect to see a full LSP packet dumped, like it works in FRR8
Correct output of debug isis packet-dump on FRR8
Hi Russ (@riw777),
many thanks for introducing IS-IS over tunnel feature, I'm using this feature a lot, but how do you think if it can affect LSP output or not?.. And could you please also clarify why it's available only in FRR9 versions and not in FRR8? I'm a little bit confused by FRR versioning, I expected to see constantly increasing version number, but FRR Release 8.5.4 was released after FRR 9.1 Release, could you please explain why? Appreciate it.
Description
After enabling
debug isis packet-dump
the output shows only a half of LSP, losing the second part. The screenshot shows FRR's dump on the left and Wireshark packet dump on the right, a red line highlights missed part of LSPIt works on FRR8, but I have to use FRR9, because of isisd: IS-IS over tunnel patch enabled on FRR9 only (could you please also clarify why it's available only in FRR9?)
Correct output of
debug isis packet-dump
on FRR8Version
How to reproduce
Minimal lab should include 2FRRs with established adjacency between them. Then turn on
debug isis packet-dump
on the first FRR and change a link cost the second FRRFRR1
FRR2
FRR1
FRR2
To get the lab quickly, I can suggest to use containerlab, the topology is defined here
Expected behavior
I expect to see a full LSP packet dumped, like it works in FRR8
Correct output of
debug isis packet-dump
on FRR8Actual behavior
The actual output of
debug isis packet-dump
on FRR9 includes only half LSPAdditional context
No response
Checklist
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