neighbor enable-peer-as-check

Enables the outbound AS_PATH check function so that a BGP sender speaker does not send routes with an AS path that contains the ASN of the receiving speaker.

Syntax

neighbor { ip-address | ipv6-address | peer-group-name } enable-peer-as-check

no neighbor { ip-address | ipv6-address | peer-group-name } enable-peer-as-check

Command Default

Disabled.

Parameters

ip-address: Specifies the IPv4 address of the neighbor.
ipv6-address: Specifies the IPv6 address of the neighbor.
peer-group-name: Specifies a peer group.

Modes

BGP address-family IPv4 unicast configuration mode

BGP address-family IPv6 unicast configuration mode

BGP address-family IPv4 unicast VRF configuration mode

BGP address-family IPv6 unicast VRF configuration mode

BGP address-family L2VPN EVPN configuration mode

Usage Guidelines

When the neighbor enable-peer-as-check command is used for a BGP address family, a neighbor reset is required.

The no form of the command disables the AS-path check function.

Examples

The following example enables the outbound AS_PATH check function for the L2VPN EVPN unicast address family.

device# configure terminal
device(config)# router bgp
device(config-bgp-router)# address-family l2vpn evpn
device(config-bgp-evpn)# neighbor 10.1.1.1 enable-peer-as-check

The following example enables the outbound AS_PATH check function for the IPv6 unicast address family.

SLX# configure terminal
SLX(config)# router bgp
SLX(config-bgp-router)# address-family ipv6 unicast 
SLX(config-bgp-ipv6u)# neighbor 10.1.1.1 enable-peer-as-check