Configuring Basic BGP Router Parameters

The basic steps for configuring BGP are:

• Entering BGP configuration mode for this router, specifying the AS
• Setting a BGP-specific router ID
• Configuring BGP parameters

Configuring Basic BGP describes how to configure Basic BGP.

Configuring Basic BGP

Step	Task	Command(s)
1	In configuration command mode, enable BGP and enter BGP configuration mode, specifying the autonomous system for this router.	router bgp as-number
2	In BGP configuration mode, configure the BGP router-ID.	bgp router-id router-id
3	Optionally enter address family mode and configure the address family indicator (AFI) for BGP peers.	address-family [ipv4 | ipv6] [unicast | multicast | both] [vrf vrf-name]
4	In BGP configuration mode, optionally configure an aggregate by combining the characteristics of multiple routes so that a single route is advertised.	aggregate-address prefix/length [summary] [as-set] [summary-and-as-set] [suppress-map route-map] [advertise-map route-map] [attribute-map route-map] [no-reject]
5	In BGP configuration mode, optionally enable aggregation of routes independent of the route MED.	bgp aggregate-med
6	In BGP configuration mode, optionally disable deterministic processing of MEDs.	no bgp deterministic-med
7	In BGP configuration mode, optionally specify whether to compare MEDs when multiple routes with differing MEDs are received from peers in different Autonomous Systems.	bgp always-compare-med
8	In BGP configuration mode, optionally modify the local-preference of advertised routes for the router.	bgp local-pref pref-value
9	In BGP configuration mode, optionally modify the route selection priority given to internal or external BGP routes compared to other protocols for the router.	bgp distance {internal | external} distance
10	In BGP configuration mode, optionally modify the maximum number of allowed external BGP ECMP routes.	bgp max-ebgp-ecmp-routes value
11	In BGP configuration mode, optionally modify the maximum number of allowed internal BGP ECMP routes.	bgp max-ibgp-ecmp-routes value
12	In BGP configuration mode, optionally disable BGP configuration on the router. Administratively disabled BGP configuration can be reenabled using the enable command.	no enable
13	In BGP configuration mode, optionally disable message logging via the syslog mechanism whenever a BGP peer enters or leaves the established state.	no log-up-down
14	In BGP configuration mode, optionally enable the sending of BGP traps when a peer transitions to Established or a lower state.	bgp trap {peer-established | peer-degraded}