Yesterday I did some Internetwork Expert vol1 labs on BGP. I was having trouble getting some of the peers to come up and had to troubleshoot. This post will describe how to troubleshoot when peers won’t form. First, lets look
Border Gateway Protocol (BGP) – notes
Uses TCP as transport, port 179 Path vector protocol Checks before becoming a neighbor The TCP connection request must come from an IP associated with a neighbor command The AS number must match that in the neighbore statement The routers