apply large-community

Format

apply large-community { aa:bb:cc } &<1-16> { additive | overwrite | delete }

apply large-community none

undo apply large-community

Parameters

Parameter	Description	Value
aa:bb:cc	Specifies a value of the Large-Community attribute.	The value is in the format of aa:bb:cc. The values of aa, bb, and cc are integers ranging from 0 to 4294967295.
additive	Adds a value to the Large Community attribute carried in routes.	-
overwrite	Overwrites the existing values of the Large-Community attribute.	-
delete	Deletes the values of the Large-Community attribute carried in the matched routes.	-
none	Deletes all the Large-Community values set for the BGP routes to be imported. If the parameter is applied to BGP, it takes effect on the routes to be imported, not on the routes to be advertised.	-

Views

Route-policy view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
route-base	write

Usage Guidelines

Usage Scenario

The Large-Community attribute is a private attribute of BGP and can be flexibly applied to route-policies. To modify or set values of the Large-Community attribute in BGP routes, run the apply large-community command.

Configuration Impact

If the apply large-community command is run in a route-policy, the values of the Large-Community attribute in the BGP routes filtered by the route-policy will be changed to the value in the route-policy.

Assume that the Large Community attribute in the original BGP routes is set to 10:3:20 and 10:3:30. For the BGP routes that meet the filtering conditions:

If the apply large-community 20:4:30 overwrite command has been run, the values of the Large-Community attribute are changed to 20:4:30.
If the apply large-community 10:3:20 delete command has been run, the values of the Large-Community attribute are changed to 10:3:30.
If the apply large-community 20:4:30 additive command has been run, the value 20:4:30 is added to the Large-Community attribute list including 10:3:20 and 10:3:30 already.
If the apply large-community none command has been run, all the values set for the Large-Community attribute are deleted.

Precautions

If the apply large-community command is run more than once, the latest configuration overrides the previous one.

Example

# Configure a route-policy named setlargecommunity to filter the routes whose AS_Path filter is 8, and change the values of the Large-Community attribute in the matched routes to 10:3:20.

<HUAWEI> system-view
[~HUAWEI] ip as-path-filter 8 permit ^10_
[*HUAWEI] route-policy setlargecommunity permit node 16
[*HUAWEI-route-policy] if-match as-path-filter 8
[*HUAWEI-route-policy] apply large-community 10:3:20 overwrite