nanog mailing list archives

Re: Networks ignoring prepends?


From: Tom Beecher <beecher () beecher cc>
Date: Tue, 23 Jan 2024 12:37:17 -0500


Apparently there is a conflict between what you want and what 47787 wants.
As you both seem to be paying customers, you should probably ask 3356 to
resolve that instead of us random internet folks.


Calling 3356 and saying "I know your global routing policy is to prefer a
customer learned route over a peer route, but can you change that for me
please?" probably won't see much success.



On Tue, Jan 23, 2024 at 8:39 AM Alex Le Heux <alexlh () funk org> wrote:


Packets don't have customers, ISPs do. And in this case you're not a
customer of the ISP making the routing decision

Incorrect. I am a customer of 3356. A residential customer, not a BGP
customer. I'm paying them to route my packets too, and they're routing
them poorly.

Oh, you should have said that right away, or perhaps I missed it.

In that case it’s simple: Stop giving them money for bad service. By
continuing to give them money you’re incentivizing them to continue
breaking your internet, making you the architect of your own misery ;)

Also incorrect: every packet in your network is linked to either one
or two customers. Never more. Never less. Routing my packet via 47787
in this case serves neither of us: my Internet access is severely
degraded and 47787 is charged money for a packet they need not have
handled.

Nonsense. 47787 is clearly telling 3356 they *want* to handle that traffic
and even paying for the privilege. Apparently there is a conflict between
what you want and what 47787 wants. As you both seem to be paying
customers, you should probably ask 3356 to resolve that instead of us
random internet folks.

Fact is that all prepending does it provide a vague hint to other
networks about what you would like them to do.

Until they tamper with it using localpref, BGP's default behavior with
prepends does exactly the right thing, at least in my situation.

Try giving your money to someone who runs BGP with just its default
settings and no policies, see how well that works out.

Cheers,

Alex


Regards,
Bill Herrin

--
William Herrin
bill () herrin us
https://bill.herrin.us/


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