Configuring BGP Confederation

Syntax:

set bgp

      confederation identifier {<AS Number> | off}

      confederation aspath-loops-permitted {<1-10> | default}

      routing-domain identifier {<AS Number> | off}

      routing-domain aspath-loops-permitted {<1-10> | default}

      synchronization {off | on}

Parameters:

Parameter

Description

confederation identifier {<AS Number> | off}

Configures or disables the identifier for the entire confederation.

This identifier is used as the autonomous system number in external BGP sessions.

Outside the confederation, the confederation id is the autonomous system number of a single, large autonomous system.

Thus the confederation id must be a globally unique, typically assigned autonomous system number.

confederation aspath-loops permitted {<1-10> | default}

Specifies the number of times the local autonomous system can appear in an autonomous system path for BGP-learned routes.

If this number is higher than the number of times the local autonomous system appears in an autonomous system path, the corresponding routes are discarded or rejected.

Range: 1-10

Default: 1

routing-domain identifier {<AS Number> | off}

Configures or disables the routing domain identifier (RDI) for this router.

You must specify the RDI if you are using BGP confederations.

The RDI does not need to be globally unique since it is used only within the domain of the confederation.

routing-domain aspath-loops-permitted {<1-10> | default}

Specifies the number of times the local autonomous system can appear in an autonomous system path for BGP-learned routes.

If this number is higher than the number of times the local autonomous system appears in an autonomous system path, the corresponding routes are discarded or rejected.

Range: 1-10

Default: 1

synchronization {off | on}

Disables (off) or enables (on) IGP synchronization.

Enable this option to force internal and confederation BGP peers to check for a matching route from IGP protocol before installing a BGP learned route.