Re: Sites unreachable while traversing Dallas IXP

[nanog--- via NANOG]

On 26 September 2025 18:01:49 CEST, Brian Turnbow via NANOG 
<nanog@lists.nanog.org> wrote:
>HI,
>
>On Fri, 26 Sept 2025 at 17:23, Tom Beecher <beec...@beecher.cc> wrote:
>> I'm guessing this isn't the case here, since the OP stated his BGP sessions 
>> came up and traffic was flowing, but it's possible and a good callout.
>>
>Yes it is not an acl on his port, as no sessions would come up,  but
>maybe a fabric forwarding issue.

What if one port was dropping all traffic, but BGP kept retrying until it got 
hashed onto the working port, or it was only L3 hashing and happened to put BGP 
sessions always on the working port? IMO, BGP being up isn't evidence of all 
links working and no traffic drops.


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