Bgp Path Selection Process; Bgp Routing Policy - Enterasys Security Router X-PeditionTM User Manual

BGP Path Selection Process

BGP routers usually consider multiple paths to a destination. The BGP best path selection process
decides the optimal path to install in the IP routing table and use for forwarding traffic.
Only routes that are synchronized, are free of AS loops and have a valid next-hop are considered
in the selection process, as illustrated in

BGP Routing Policy

The XSR employs Access Control Lists (ACLs), filter lists, community lists, route maps, regular
expressions, and peer groups to implement BGP routing policy, (refer to
are described in the following pages.
Figure 6-8.
Figure 6-8 BGP Path Selection Algorithm
Figure 6-9 BGP Routing Policy Process
Overview
Figure 6-9. These features
XSR User's Guide 6-11