neighbor allowas-in

Disables the AS_PATH check function for routes learned from a specified location so that BGP does not reject routes that contain the recipient BGP speaker's AS number.
Syntax
neighbor {ip-address | ipv6-address | peer-group-name } neighbor allowas-in number
no neighbor allowas-in {ip-address | ipv6-address | peer-group-name } neighbor allowas-in number
Command Default

The AS_PATH check function is enabled and any route whose path contains the speaker's AS number is rejected as a loop.

Parameters
ip-address
Specifies the IP address of the neighbor.
ipv6-address
Specifies the IPv6 address of the neighbor.
peer-group-name
Specifies a peer group.
number
Specifies the number of times that the AS path of a received route may contain the recipient BGP speaker's AS number and still be accepted. Valid values range from 1 through 10.
Modes

BGP configuration mode

BGP address-family IPv6 unicast configuration mode

Usage Guidelines

When this command is entered in BGP global configuration mode, it applies only to the IPv4 address family. Use this command in BGP address-family IPv6 unicast configuration mode for BGP4+ configurations.

The no form of the command re-enables the AS_PATH check function.

Examples

The following example specifies that the AS path of a received route may contain the recipient BGP speaker's AS number three times and still be accepted. 

device#configure terminal
device(config)# router bgp
device(config-bgp-router)# address-family ipv6 unicast
device(config-bgp-ipv6u)# neighbor 2001:2018:8192::125 allowas-in 3
Parent topic: Commands N