4000 Router Series Layer 3 - IP Routing Command Reference

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Related commands

• apply extcommunity

• if-match extcommunity

• ip extcommunity-list

peer allow-as-loop

Use peer allow-as-loop to allow a local AS number to exist in the AS_PATH attribute of routes from a peer

or peer group, and to configure the number of times the local AS number can appear.

Use undo peer allow-as-loop to restore the default.

Syntax

In BGP IPv4 unicast address family view/BGP-VPN IPv4 unicast address family view/BGP VPNv4

address family view/BGP L2VPN address family view:

peer { group-name | ip-address } allow-as-loop [ number ]

undo peer { group-name | ip-address } allow-as-loop

In BGP IPv6 unicast address family view:

peer { group-name | ip-address | ipv6-address } allow-as-loop [ number ]

undo peer { group-name | ip-address | ipv6-address } allow-as-loop

In BGP VPN IPv6 unicast address family view:

peer { group-name | ipv6-address } allow-as-loop [ number ]

undo peer { group-name | ipv6-address } allow-as-loop

Default

The local AS number is not allowed to exist in the AS_PATH attribute of routes from a peer or peer group.

Views

BGP IPv4 unicast address family view, BGP-VPN IPv4 unicast address family view, BGP-VPNv4 address

family view, BGP IPv6 unicast address family view, BGP-VPN IPv6 unicast address family view, BGP

L2VPN address family view

Predefined user roles

network-admin

Parameters

group-name: Specifies a peer group by its name, a case-sensitive string of 1 to 47 characters. The peer

group must have been created.

ip-address: Specifies a peer by its IP address. The peer must have been created.

ipv6-address: Specifies a peer by its IPv6 address. The peer must have been created.

number: Specifies the number of times for which the local AS number can appear, in the range of 1 to

10. The default number is 1. If the number of times for which the local AS number appears in a route is

more than the specified number, BGP considers that a routing loop occurs and discards the route.