Reference v4.1.0 Instruction Manual

498 Network OS Command Reference

53-1003115-01

neighbor enforce-first-as (BGP)

Ensures that a device requires the first ASN listed in the AS_SEQUENCE field of an AS path-update

message from EBGP neighbors to be the ASN of the neighbor that sent the update.

Synopsis neighbor {ip-address | peer-group-name} enforce-first-as [enable | disable]

no neighbor {ip-address | peer-group-name} enforce-first-as [enable | disable]

Operands ip-address IPv4 address of the neighbor

peer-group-name Peer group name configured by the neighbor peer-group-name command.

enable Enables this feature.

disable Disables this feature.

Defaults This feature is disabled: A device does not require the first ASN listed in the AS_SEQUENCE field of

an AS path-update message from EBGP neighbors to be the ASN of the neighbor that sent the

update.

Command Modes BGP configuration mode

Description Use this command to ensure that a device requires the first ASN listed in the AS_SEQUENCE field

of an AS path-update message from EBGP neighbors to be the ASN of the neighbor that sent the

update.

Usage Guidelines Use the no form of this command to disable this requirement globally for the device.

Examples

switch(config)# rbridge-id 10

switch(config-rbridge-id-10)# router bgp

switch(config-bgp-router)# neighbor 10.11.12.13 enforce-first-as enable