I use BGP extensively to provide dynamic routing between a number of vendors, business partners and affiliated organizations with whom I’m multi-homed to. I recently had to determine if Nortel/Avaya supported eBGP MultiHop on the Ethernet Routing Switch 8600 software release 5.x (they do). Thankfully I was able to peer with a Cisco 6500 switch that was sitting behind a Cisco firewall module from an Ethernet Routing Switch 8600 without any significant issues,.
If you are looking for a great resource on BGP I would highly recommend O’Reilly’s book titled BGP.
If you are looking for Avaya/Nortel specific information concerning their BGP implement then you are in luck. Avaya has a technical configuration guide for the ERS 8600 that focuses on BGP. While this is an older document (November 2007) it still does a great job of providing a number of configuration examples and explaining the basics.
In the near future I might need to use an ERS 8606 as an Internet router. I’ll need to peer with the ISP since I’m multi-home to independent Internet Service Providers, although I’m not sure if the 8692SF can handle a full BGP routing table. Has anyone ever tried to feeding a full (or partial) BGP routing table from the Internet to an ERS 8800/8600 switch?