Configuration Guide User guide

FastIron Configuration Guide 1349
53-1002494-02
BGP4 parameters
NOTE
To disable BGP4 without losing the BGP4 configuration information, remove the local AS (for
example, by entering the no local-as <num> command). In this case, BGP4 retains the other
configuration information but is not operational until you set the local AS again.
BGP4 parameters
You can modify or set the following BGP4 parameters:
• Optional – Define the router ID. (The same router ID also is used by OSPF.)
• Required – Specify the local AS number.
• Optional – Add a loopback interface for use with neighbors.
• Required – Identify BGP4 neighbors.
• Optional – Change the Keep Alive Time and Hold Time.
• Optional – Change the update timer for route changes.
• Optional – Enable fast external fallover.
• Optional – Specify a list of individual networks in the local AS to be advertised to remote
autonomous systems using BGP4.
• Optional – Change the default local preference for routes.
• Optional – Enable the default route (default-information-originate).
• Optional – Enable use of a default route to resolve a BGP4 next-hop route.
• Optional – Change the default MED (metric).
• Optional – Enable next-hop recursion.
• Optional – Change the default administrative distances for EBGP, IBGP, and locally originated
routes.
• Optional – Require the first AS in an Update from an EBGP neighbor to be the neighbor AS.
• Optional – Change MED comparison parameters.
• Optional – Disable comparison of the AS-Path length.
• Optional – Enable comparison of the router ID.
• Optional – Enable auto summary to summarize routes at an IP class boundary (A, B, or C).
• Optional – Aggregate routes in the BGP4 route table into CIDR blocks.
• Optional – Configure the router as a BGP4 router reflector.
• Optional – Configure the Layer 3 switch as a member of a BGP4 confederation.
• Optional – Change the default metric for routes that BGP4 redistributes into RIP or OSPF.
• Optional – Change the parameters for RIP, OSPF, or static routes redistributed into BGP4.
• Optional – Change the number of paths for BGP4 load sharing.
• Optional – Change other load-sharing parameters
• Optional – Define BGP4 address filters.
• Optional – Define BGP4 AS-path filters.
• Optional – Define BGP4 community filters.
• Optional – Define IP prefix lists.