Configuring The As_Path Attribute - HP MSR2000 series Configuration Manual

If you have configured BGP load balancing on a BGP router, the router will set it as the next hop for routes
sent to an IBGP peer or peer group. This is done regardless of whether the peer next-hop-local command
is configured.
To configure the NEXT_HOP attribute:
Step
1. Enter system view.
2. Enter BGP view.
3. Specify the router as the next hop of
routes sent to a peer or peer group.

Configuring the AS_PATH attribute

Permitting local AS number to appear in routes from a peer or peer group
BGP checks whether the AS_PATH attribute of a route from a peer contains the local AS number. If so, it
discards the route to avoid routing loops.
To permit local AS number to appear in routes from a peer or peer group and specify the appearance
times.
Step
1. Enter system view.
2. Enter BGP view.
3. Permit local AS number to appear in
routes from a peer or peer group and
specify the appearance times.
Disabling BGP from considering AS_PATH during best route selection
Step
1. Enter system view.
2. Enter BGP view.
3. Disable BGP from considering
AS_PATH during best route selection.
Command
system-view
bgp as-number
peer { group-name | ip-address }
next-hop-local
Command
system-view
bgp as-number
peer { group-name | ip-address }
allow-as-loop [ number ]
Command
system-view
bgp as-number
bestroute as-path-neglect
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Remarks
N/A
N/A
Optional.
By default, the router sets it
as the next hop for routes
sent to an EBGP peer or peer
group, but does not set it as
the next hop for routes sent
to an IBGP peer or peer
group.
Remarks
N/A
N/A
Optional.
By default, the local AS
number is not allowed.
Remarks
N/A
N/A
Optional.
By default, BGP considers
AS_PATH during best route
selection.