Configuring Preferences For Bgp Routes - HP 5500 EI series Configuration Manual

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Step
3.
Enter BGP IPv4 unicast
address family view or
BGP-VPN IPv4 unicast
address family view.
4.
Specify a preferred value for
routes received from a peer or
peer group.
To specify a preferred value for routes from a peer or peer group (IPv6):
Step
1.
Enter system view.
2.
Enter BGP view or BGP-VPN
instance view.
3.
Enter BGP IPv6 unicast
address family view or
BGP-VPN IPv6 unicast
address family view.
4.
Specify a preferred value for
routes received from a peer or
peer group.

Configuring preferences for BGP routes

Routing protocols each have a default preference. If they find multiple routes destined for the same
network, the route found by the routing protocol with the highest preference is selected as the optimal
route.
You can use the preference command to modify preferences for EBGP, IBGP, and local BGP routes, or
reference a routing policy to set a preference for matching routes (for routes not matching the routing
policy, the default preference applies).
If a device has an EBGP route and a local BGP route to reach the same destination, it does not select the
EBGP route because the EBGP route has a lower preference than the local BGP route by default. You can
use the network short-cut command to configure the EBGP route as a shortcut route that has the same
preference as the local BGP route so that the EBGP route will more likely become the optimal route.
To configure preferences for BGP routes (IPv4):
Step
1.
Enter system view.
Command
address-family ipv4 [ unicast ]
peer { group-name | ip-address }
preferred-value value
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 ipv6 [ unicast ]
peer { group-name |
ipv6-address } preferred-value
value
Command
system-view
210
Remarks
N/A
The default preferred value is 0.
Remarks
N/A
N/A
N/A
The default preferred value is 0.
Remarks
N/A

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