The apply local-preference command sets the action for changing the local preference of BGP routes in a routing policy.
The undo apply local-preference command restores the default setting.
By default, the action for changing the local preference of BGP routes is not set in a routing policy.
Product |
Support |
|---|---|
S5720-EI, S5720-HI, S5720I-SI, S5720S-SI, S5720-SI, S5735-S, S5735S-S, S5735-S-I, S5730-HI, S5730S-EI, S5730-SI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6720S-SI, S6720-SI, S6730-H, S6730S-H, S6730-S, and S6730S-S |
Supported. |
S2720-EI, S5720-LI, S5735-L, S5735S-L, S5735S-L-M, S5720S-LI, S6720-LI, and S6720S-LI |
Not supported. |
| Parameter | Description | Value |
|---|---|---|
| preference | Specifies the local preference of BGP routes. | The value is an integer ranging from 0 to 4294967295. |
Usage Scenario
The Local-Pref attribute is a private attribute of BGP. The apply local-preference command sets only the local preference for BGP routes. The Local_Pref attribute is used to determine the optimal route when traffic leaves an AS. When a BGP router obtains multiple routes to the same destination address but with different next hops through IBGP peers, the route with the largest Local_Pref value is selected.
Prerequisites
After a BGP route matches a routing policy, you can change the local preference of the BGP route.
Precautions
When a routing policy takes effect, it affects BGP route selection.
The Local_Pref attribute applies to the routing within an AS rather than be advertised to the outside of the AS. In this case, the apply local-preference command does not take effect when EBGP neighbor relationships are set up.