Administrator Guide

to be in “full mesh.” As seen in the following illustration, four routers connected in a full mesh have three
peers each, six routers have five peers each, and eight routers in full mesh have seven peers each.
Figure 19. BGP Routers in Full Mesh
The number of BGP speakers each BGP peer must maintain increases exponentially. Network management
quickly becomes impossible.
Border Gateway Protocol IPv4 (BGPv4) 198