Chapter 50
| IP Routing Commands
Border Gateway Protocol (BGPv4)
– 1080 –
and AS-Confed-Set. Neither are AS numbers of member ASes advertised to exterior
peers.
Configuration Guidelines
1. Use the bgp confederation identifier command to configures the identifier for a
confederation containing smaller multiple internal autonomous systems.
2. Use the bgp confederation peer command to add an internal peer autonomous
system to a confederation.
Route Servers
Route Servers are used to relay routes received from remote ASes to client routers,
as well as to relay routes between client routers. Clients maintain BGP sessions only
with the assigned route servers. Sessions with more than one server can be used to
provide redundancy and load sharing. All routes received from a client router are
propagated to other clients through the Route Server. Since all external routes and
their attributes are relayed unmodified between client routers, they acquire the
same routing information as they would via direct peering in a full mesh
configuration.
Figure 5: Connections for Route Server
Configuration Guidelines
Use the neighbor route-server-client command to configure this router as a route
server and the specified neighbor as its client.
Router
Router
Router
Router
Route
Server
Router
eBGP
Speaker
Router
Router
Advertised
Routes
Router
Router
Router
eBGP
Speaker
Advertised
Routes
Route
Server
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