[Sysadmins] Eircom internet unusable (Maynooth area)

Nick Hilliard nick at netability.ie
Tue Dec 9 12:44:03 GMT 2014


On 08/12/2014 22:13, Vanush Misha Paturyan wrote:
> I'm not an expert in complex routing tables, but I always
> thought if both networks are from the same AS, then they should be
> routed the same way to the peering point of that AS?

It may be happening for other reasons, but this can happen when a network
uses equal cost multipath routing, as described in the unnecessarily
negative wikipedia article:

> http://en.wikipedia.org/wiki/Equal-cost_multi-path_routing

Nick





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