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Asked by disca1 in Network Design & Methodology, Network Routers, Miscellaneous Networking
We run a small hosted services ISP. We currently have two Cisco routers each doing BGP to a a few Tier1/Tier2 providers for redundancy. We have just joined a peering exchange and are in the process of getting initial configuration for the router set up.
Few related questions:-
In Cisco book "BGP Design and Implementation" it states that the biggest risks with a peering exchange are other users on the peering exchange "pointing default" to you and "Third-part next hop" manipulation. For both it states the solution is to have a dedicated peering router that does not carry full routes essentially only having routes to the internal network so that any other traffic is dropped. Sadly it doesn't give configuration examples for this.
1) Is this absolutely necessary - I do have a Cisco 7200 NPE400 I could use for this but I wanted to keep this to be another transit router (As obviously I can connect multiple transit providers to it)?
2) Are there any ways to address these security concerns without using a dedicated router - if so how?
3) Could anyone glance over my initial draft for the router configuration and see if they can spot any errors/improvements and/or add/advise on the necessary route filter that would have to be applied to the iBGP peers to stop the full table being passed should it be necessary to dedicate a router to the peering exchange.
20091111-EE-VQP-89 - Hierarchy / EE_QW_3_20080625
