Quote:
Originally Posted by Chrysalis
that explanation is making sense so pip just happens to be nearer to the route that has the nl route so for him gets picked.
This may go some way to explaining why VM's network has more routing oddities as well since on a adsl isp everyone tends to go to one central routing point (usually in london) whilst VM have a national network which can drop you off at different points.
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Correct.
Most ADSL is centralised as their subscribers all terminate on LNS which live in data centres, Easynet's peering is quite centralised on London for historical reasons.
VM have transits running from all over the place, Manchester, Guildford, Winnersh, Docklands, Brentford, etc, etc. The network shifts hundreds of Gbit/s and to be funnelling all of that through London is neither feasible nor intelligent. Routers running with 4 x 40GigE port channels for the sake of centralising would be phenomenally expensive. Getting traffic off the network as quickly as reasonably possible reduces capacity requirements internally as well as keeping routing more available as more exit points.
All that said VM's execution of this strategy can leave a lot to be desired at times.
Not sticking up for anyone, they just happen to be right this time. Nearly everyone is right now and then, I'll be joining the chorus when they next have a routing mishap due to their own traffic management, no fear
