Hi,
On Sat, Aug 02, 2025 at 06:47:29AM +0000, James Bensley wrote:
> There is also a third reason which is the operational headaches
> that LP tuning introduced. The old school telco mentality is
> (roughly); customer ports have best LP, peers/IXP ports have 2nd
> best LP, transits ports have 3rd best LP.
I second this. This is all very well-intended, but usually just gets
in the way at some point - so if ISP networks start working with LP, it
inevitably results in sub-optimal paths later on (LP preferring a
longer AS path through a private interconnect vs. a direct peering
over an IXP is a classic example) - which needs manual interaction
to fix. Given the amount of BGP expertise in operational networks is
going down over time, doing anything that needs more BGP expertise in
future should not be encouraged.
Gert Doering
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