Bgp Communities; Bgp Features; Route Reflectors - Extreme Networks ExtremeWare XOS Guide Manual

BGP Communities

BGP Communities
A BGP community is a group of BGP destinations that require common handling. ExtremeWare XOS
supports the following well-known BGP community attributes:
• no-export
• no-advertise
• no-export-subconfed

BGP Features

This section describes the following BGP features supported by ExtremeWare XOS:
• Route Reflectors on page 205
• Route Confederations on page 207
• Route Aggregation on page 211
• Using the Loopback Interface on page 211
• BGP Peer Groups on page 211
• BGP Route Flap Dampening on page 212
• BGP Route Selection on page 213
• Route Re-Distribution on page 214
• BGP Static Network on page 215

Route Reflectors

Another way to overcome the difficulties of creating a fully-meshed AS is to use route reflectors. Route
reflectors allow a single router to serve as a central routing point for the AS or sub-AS.
A cluster is formed by the route reflector and its client routers. Peer routers that are not part of the
cluster must be fully meshed according to the rules of BGP.
A BGP cluster, including the route reflector and its clients, is shown in Figure 38.
ExtremeWare XOS 10.1 Concepts Guide 205