Configuring The Next_Hop Attribute - HP 5500 EI series Configuration Manual

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not belong to the confederation, BGP does not compare it with other routes. As a result, the first route
becomes the optimal route.
To enable MED comparison for routes from confederation peers (IPv4):
Step
1.
Enter system view.
2.
Enter BGP view or BGP-VPN
instance view.
3.
Enter BGP IPv4 unicast
address family view or
BGP-VPN IPv4 unicast
address family view.
4.
Enable MED comparison for
routes from confederation
peers.
To enable MED comparison for routes from confederation peers (IPv6):
Step
1.
Enter system view.
2.
Enter BGP view.
3.
Enter BGP IPv6 unicast
address family view.
4.
Enable MED comparison for
routes from confederation
peers.

Configuring the NEXT_HOP attribute

By default, a BGP router does not set itself as the next hop for routes advertised to an IBGP peer or peer
group. In some cases, however, you must configure the advertising router as the next hop to make sure
the BGP peer can find the correct next hop.
For example, as shown in
Router B and Router C establish an IBGP neighbor relationship. If Router C has no route destined for IP
address 1.1.1.1/24, you must configure Router B to set itself 3.1.1.1/24 as the next hop for the network
2.1.1.1/24 advertised to Router C.
Command
system-view
Enter BGP view:
bgp as-number
Enter BGP-VPN instance view:
a.
bgp as-number
b.
ip vpn-instance
vpn-instance-name
address-family ipv4 [ unicast ]
bestroute med-confederation
Command
system-view
bgp as-number
address-family ipv6 [ unicast ]
bestroute med-confederation
Figure
57, Router A and Router B establish an EBGP neighbor relationship, and
216
Remarks
N/A
N/A
N/A
By default, this feature is disabled.
Remarks
N/A
N/A
N/A
By default, this feature is disabled.

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