Enable BGP4 Globally

When BGP4 is enabled, you can configure more advanced features such as route dampening and autonomous system confederation.

Procedure

  1. Access global configuration mode.
    device# configure terminal
  2. Enable BGP4 globally.
    device(config)# router bgp 

Example

Several configurations are available from BGP router configuration mode.

device(config-bgp-router)# ?
Possible completions:
  address-family                Enter Address Family command mode
  always-compare-med            Allow comparing MED from different neighbors
  as-path-ignore                Ignore AS_PATH length for best route selection
  auto-shutdown-new-neighbors   Auto shutdown new neighbor
  capability                    Set capability
  cluster-id                    Configure Route-Reflector Cluster-ID
  compare-med-empty-aspath      Allow comparing MED from different neighbors
                                even with empty as-path attribute
  compare-routerid              Compare router-id for identical BGP paths
  confederation                 Configure AS confederation parameters
  default-local-preference      Configure default local preference value
  describe                      Display transparent command information
  distance                      Define an administrative distance
  enforce-first-as              Enforce the first AS for EBGP routes
  fast-external-fallover        Reset session if link to EBGP peer goes down
  install-igp-cost              Install igp cost to nexthop instead of MED
                                value as BGP route cost
  local-as                      Configure local AS number
  log-dampening-debug           Log dampening debug messages
  maxas-limit                   Impose limit on number of ASes in AS-PATH
                                attribute
  med-missing-as-worst          Consider routes missing MED attribute asleast
                                desirable
  neighbor                      Specify a neighbor router
 
  timers                        Adjust routing timers