Expanded Community Lists is a user defined BGP Expanded Community Lists.
This command defines a new standard extcommunity-list. extcommunity is extended communities value. The extcommunity is compiled into extended community structure. We can define multiple extcommunity-list under same name. In that case match will happen user defined order. Once the extcommunity-list matches to extended communities attribute in BGP updates it return permit or deny based upon the extcommunity-list definition. When there is no matched entry, deny will be returned. When extcommunity is empty it matches to any routes.
This command defines a new expanded extcommunity-list. line is a string expression of extended communities attribute. line can include regular expression to match extended communities attribute in BGP updates.
These commands delete extended community lists specified by name. All of extended community lists shares a single name space. So extended community lists can be removed simpley specifying the name.