HP VPN Firewall Appliances Network Management Configuration Guide

494
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter BGP view or BGP-VPN
instance view.
• Enter BGP view:
bgp as-number
• Enter BGP-VPN instance view:
a. bgp as-number
b. pv4-family
vpn-instance
vpn-instance-name
Use either method.
3. Permit local AS number to
appear in routes from a
peer or peer group and
specify the appearance
times.
peer { group-name | ip-address }
allow-as-loop [ number ]
Optional.
By default, the local AS number
is not allowed to appear in routes
from a peer or peer group.
2. Disabling BGP from considering AS_PATH during best route selection
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter BGP view or
BGP-VPN instance view.
• Enter BGP view:
bgp as-number
• Enter BGP-VPN instance
view:
a. bgp as-number
b. ipv4-family
vpn-instance
vpn-instance-name
Use either method.
3. Disable BGP from
considering AS_PATH
during best route selection.
bestroute as-path-neglect
Optional.
By default, BGP considers
AS_PATH during best route
selection.
3. Specifying a fake AS number for a peer or peer group
When Router A in AS 2 is moved to AS 3, you can configure Router A to specify a fake AS number
of 2 for created connections to EBGP peers or peer groups. In this way, these EBGP peers still think
Router A is in AS 2 and need not change their configurations. This feature ensures uninterrupted
BGP services.
To specify a fake AS number for a peer or peer group:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter BGP view or
BGP-VPN instance
view.
• Enter BGP view:
bgp as-number
• Enter BGP-VPN instance view:
a. bgp as-number
b. ipv4-family vpn-instance
vpn-instance-name
Use either method.