[j-nsp] igmp snooping layer 2 querier breaks ospf in other devices

[Aditya Mahale]

When you enabled pim multicast routes are added to the pfe, this is mostly
breaking ospf over l2 ckt because these packets are mostly now matching the
default 224 routes added to pfe . Without having any show commands or
rtsockmon it’s difficult to debug anything

-Aditya
Google

On Fri, Feb 2, 2024 at 8:21 AM Aaron Gould via juniper-nsp <
juniper-nsp at puck.nether.net> wrote:

> I tried to recreate the scenario in my lab with no success
>
> 21.2R3-S4.8 - in lab - problem not seen
> 20.2R3-S7.3 - in lab - problem not seen
> 19.2R3-S6.1 - in lab - problem not seen
> 18.3R3-S6.1 - in lab - problem not seen
> 17.4R2-S11  - in lab - problem not seen
>
> 17.4R2-S11  - in field - problem seen
>
>
> again, the problem is, when i enabled this command...
>
> set protocols igmp-snooping vlan vlan100 l2-querier source-address
> 10.100.4.1
>
> ...a customer riding an l2circuit on ge-0/0/2 report to me that their
> multicast stops working... ospf goes down and stays in INIT...
>
> when i remove all pim and igmp, then there OSPF neighbors up and stabilizes
>
> i just don't know how running igmp inside vlan 100 with ports ge-0/0/4,
> 5 and 6 would have anything to do with an l2circuit on ge-0/0/2
>
>
> -Aaron
>
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