Re: Link-state EGP

[Jeffrey Haas via NANOG <nanog () lists nanog org>]

On 8/24/25 10:40, Saku Ytti via NANOG wrote:
> Infact even internally in our AS, we would almost certainly loop if we
> didn't do MPLS, because due to specific policy and TE reasons we
> filter advertisements differently in_iBGP-IN_, this is also kind of
> big no-no, and if we did do IP lookup in core transit I cannot at all
> guarantee we wouldn't loop, but because we can guarantee that the edge
> decision is honored all the way to the other edge, we can get away
> with it.

This practical matter regularly comes up when we're doing BGP extensions.

We need to design the protocol to be safe on a hop by hop basis so that 
iBGP safely works - especially with reflectors.

You can get away with all sorts of murder if you promise you tunnel edge 
to edge.

-- Jeff



_______________________________________________
NANOG mailing list 
https://lists.nanog.org/archives/list/nanog () lists nanog org/message/ZUVH377Q5C24OGCNNQE64KJRGQTWDRFP/