Nortel Networks ALTEON OS BMD00007 - Manual (Page 279)

Alteon OS Command Reference
The Configuration Menu „ 281 BMD00007, November 2007
/cfg/l3/bgp
Border Gateway Protocol Configuration
Border Gateway Protocol (BGP) is an Internet protocol that enables routers on a network to
share routing information with each other and advertise information about the segments of the
IP address space they can access within their network with routers on external networks. BGP
allows you to decide what is the “best” route for a packet to take from your network to a desti-
nation on another network, rather than simply setting a default route from your border router(s)
to your upstream provider(s). You can configure BGP either within an autonomous system or
between different autonomous systems. When run within an autonomous system, it's called
internal BGP (iBGP). When run between different autonomous systems, it's called external
BGP (eBGP). BGP is defined in RFC 1771.
The BGP Menu enables you to configure the switch to receive routes and to advertise static
routes, fixed routes and virtual server IP addresses with other internal and external routers. In
the current Alteon OS implementation, the
GbE Switch Module does not advertise BGP routes
that are learned from other BGP “speakers”.
The BGP menu option is turned off by default.
N OTE – Fixed routes are subnet routes. There is one fixed route per IP interface.
[Border Gateway Protocol Menu]
peer - Peer menu
aggr - Aggregation menu
as - Set Autonomous System (AS) number
pref - Set Local Preference
on - Globally turn BGP ON
off - Globally turn BGP OFF
cur - Display current BGP configuration
Table 6-77 Border Gateway Protocol Menu (/cfg/l3/bgp)
Command Syntax and Usage
peer <peer number (1-16)>
Displays the menu used to configure each BGP peer. Each border router, within an autonomous
system, exchanges routing information with routers on other external networks. To view menu
options, see
page 283 .
aggr <aggregate number (1-16)>
Displays the Aggregation Menu. To view menu options, see page 286 .