North American Network Operators Group|
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Exchange point peering
I have some questions regarding an IX point. If I go to PacBell and sign the multilateral peering agreement it anyone and everyone can peer with me and I can peer with everyone else. Now if I buy a DS3 UBR port then my cells/packets have to contend with everyone else who is trying to egress out to an upstream provider. If there is contention then my cells can be dropped and my packets are unable to be reconstructed by the router. Does anyone know how this works at the Chicago NAP? Is my PCR for my ATM port set at line speed for DS3 OC3 and OC12. How do they prevent random cell discard at the egress port to upstream providers, is there a graceful discard so that cells are dropped to maximize good "packets". How does Pacbell ensure that there is a level of fairness for packet traffic. I understand that it will be UBR, but if Pacbell is sending only cells to upstream that randomly make it through the egress queues, there is really no way to ensure that ANY packets can get through. All the cells could be partial packet info. Any insight into this would be helpful so that I do not purchase a service that is worthless.