Configuring The As-Path Attribute - HP 3600 v2 series Configuration Manual

Figure 87 Next hop attribute configuration 1
If a BGP router has two peers on a common broadcast network, it does not set itself as the next hop for
routes sent to an eBGP peer by default. As shown in
neighbor relationship, and Router B and Router C establish an iBGP neighbor relationship. They are on
the same broadcast network 1.1.1.0/24. When Router B sends eBGP routes to Router A, it does not set
itself as the next hop by default. However, you can configure Router B to set it as the next hop (1.1.1.2/24)
for routes sent to Router A by using the peer next-hop-local command as needed.
Figure 88 Next hop attribute configuration 2
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.
Follow these steps to configure the next hop attribute:
To do...
Enter system view
Enter BGP view
Specify the router as the next hop of routes
sent to a peer or peer group

Configuring the AS-PATH attribute

Permit 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.
Follow these steps to permit local AS number to appear in routes from a peer or peer group and specify
the appearance times.
Figure 88, Router A and Router B establish an eBGP
Use the command...
system-view
bgp as-number
peer { group-name | ip-address }
next-hop-local
216
Remarks
—
—
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.