Ibgp Configuration Example - Cabletron Systems IA1100 User's Reference Manual

The gated.conf file for router IA1 is as follows:
autonomoussystem 1 ;
routerid 10.0.0.1 ;
bgp yes {
};
The CLI configuration for router IA2 is as follows:
interface create ip et.1.1 address-netmask 10.0.0.2/16 port et.1.1
ip-router global set autonomous-system 2
ip-router global set router-id 10.0.0.2
bgp create peer-group pg2w1 type external autonomous-system 1
bgp add peer-host 10.0.0.1 group pg2w1
bgp start
The gated.conf file for router IA2 is as follows:
autonomoussystem 2 ;
routerid 10.0.0.2 ;
bgp yes {
};

IBGP Configuration Example

Connections between BGP speakers within the same AS are referred to as internal links. A
peer in the same AS is an internal peer. Internal BGP is commonly abbreviated IBGP;
external BGP is EBGP.
An AS that has two or more EBGP peers is referred to as a multihomed AS. A multihomed
AS can transit traffic between two ASs by advertising to one AS routes that it learned from
the other AS. To successfully provide transit services, all EBGP speakers in the transit AS
must have a consistent view of all of the routes reachable through their AS.
Multihomed transit ASs can use IBGP between EBGP-speaking routers in the AS to
synchronize their routing tables. IBGP requires a full-mesh configuration; all EBGP
speaking routers must have an IBGP peering session with every other EBGP speaking
router in the AS.
Internet Appliance User Reference Manual
group type external peeras 2
{
peer 10.0.0.2
};
group type external peeras 1
{
peer 10.0.0.1
};
Chapter 8: BGP Configuration Guide
;
;
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