On Wed, 11 Nov 2015, Paul Jakma wrote:

when evaluated collectively. Non-full mesh topologies, i.e. reflection, can lead to non-transitive sub-set preference evaluations and oscillation.

Oops, add "due to interactions between MED and IGP costs, even where BGP follows the IGP topology; or even just with IGP costs, if BGP does not follow the IGP topology".

E.g. if it comes down to stage 6 (stage 11 in Quagga's code) then it possible that the originator-ID check prefers C.

Just ignore that sentence. Left over from an email with a longer example that I'd deleted. ;)

regards,
--
Paul Jakma      [email protected]  @pjakma Key ID: 64A2FF6A
Fortune:
Mene, mene, tekel, upharsen.

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