H3C Technologies H3C S12500-X Series Switches - Manual (Page 234)

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Step Command Remarks
3. Enter BGP IPv6 unicast
address family view or
BGP-VPN IPv6 unicast
address family view.
address-family ipv6 [ unicast ] N/A
4. Disable BGP from considering
AS_PATH during best route
selection. bestroute as-path-neglect
By default, BGP considers
AS_PATH during best route
selection.
592B
Advertising a fake AS number to a peer or peer group
After you move a BGP router from an AS to another AS (from AS 2 to AS 3 for example), you have to
modify the AS number of the router on all its EBGP peers. To avoid such modifications, you can configure
the router to advertise a fake AS number 2 to its EBGP peers so that the EBGP peers still think that Router
A is in AS 2.
To advertise a fake AS number to a peer or peer group (IPv4):
Step 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. ip vpn-instance
vpn-instance-name
N/A
3. Advertise a fake AS number to
a peer or peer group.
peer { group-name | ip-address }
fake-as as-number
By default, no fake AS number is
advertised to a peer or peer group.
This command applies to only
EBGP peers or EBGP peer groups.
To advertise a fake AS number to a peer or peer group (IPv6):
Step 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. ip vpn-instance
vpn-instance-name
N/A
3. Advertise a fake AS number to
a peer or peer group. peer { group-name |
ipv6-address } fake-as as-number
By default, no fake AS number is
advertised to a peer or peer group.
This command applies to only
EBGP peers or EBGP peer groups.