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aigp

Syntax

Hierarchy Level

Description

The aigp statement enables the Accumulated IGP (AIGP) BGP attribute on a specified protocol family. Configuring AIGP on a particular family enables the sending and receiving of the AIGP attribute for that family. AIGP is supported for the following address families:

  • IPv4 unicast

  • IPv6 unicast

  • Labeled unicast

This functionality allows BGP to select paths based on IGP metrics, facilitating optimal routing decisions across different autonomous systems and enhancing network performance.

The AIGP attribute enables deployments in which a single administration can run several contiguous BGP autonomous systems (ASs). Such deployments allow BGP to make routing decisions based on the IGP metric. With AIGP enabled, BGP can select paths based on IGP metrics. This enables BGP to choose the shortest path between two nodes, even though the nodes might be in different ASs. The AIGP attribute is particularly useful in networks that use tunneling to deliver a packet to its BGP next hop. Such is the case with MPLS label-switched paths.

Options

disable—Explicitly disables AIGP.

  • Default: Disabled, meaning that the device does not send an AIGP attribute and silently discards a received AIGP attribute.

Required Privilege Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 12.1.