A basic understanding of BGP will fill in most of the gaps here.
EDIT: As will this:
http://www.cisco.com/en/US/tech/tk36...80094431.shtml
Is this service affecting? Doesn't look like an incorrect route this seems to be an anycasted network.
---------- Post added at 22:19 ---------- Previous post was at 22:13 ----------
Quote:
Originally Posted by Chrysalis
but yeah your result another example of how routing is luck of the draw on an isp as different ip ranges get routed differently.
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Shoving 4 million subscribers manually through the same route is a waste of capacity.
Quote:
Originally Posted by Chrysalis
personally I think its all down to saturation of links or possibly down to trying to have active redundancy, I still get routed via leeds to everywhere which suggests the internal VM network has a saturation point forcing that reroute, and after that then there is all this alternate routing going on which suggests VM do not have the capacity to route their entire customer base on optimal routing.
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Shoving 4 million subscribers manually through the same route is a waste of capacity.
You call it 'optimal routing' - see my document above for why, according to the routing protocol, the US route is optimal.