The peer advertise link-bandwidth transitive command enables a device to convert the Link Bandwidth extended community attribute (optional non-transitive) carried in BGP routes into an optional transitive attribute before advertising the BGP routes to a specified peer.
The undo peer advertise link-bandwidth transitive command cancels the existing configuration.
By default, a device cannot convert the Link Bandwidth extended community attribute (optional non-transitive) carried in a BGP route into an optional transitive attribute before advertising the route to a BGP peer.
Usage Scenario
To enable a device to convert the Link Bandwidth extended community attribute (optional non-transitive) carried in BGP routes into an optional transitive attribute before advertising the BGP routes to a specified peer, run the peer advertise link-bandwidth transitive command.
After a peer is added to a peer group, the peer inherits the configuration of the peer group. If the peer advertise link-bandwidth transitive command is run on the local device for the peer group and the newly added peer does not need to inherit this configuration, you need to run the peer advertise link-bandwidth transitive disable command on the local device for the peer.Precautions
Before running the peer advertise link-bandwidth transitive command, you need to use a route-filter to add the Link Bandwidth extended community attribute to BGP routes.
Currently, this command can be used to process only one Link Bandwidth extended community attribute per BGP route. However, if a device changes the next-hop address of a received route carrying the Link Bandwidth extended community attribute to its own address, the device deletes this attribute before advertising it to other peers.<HUAWEI> system-view [~HUAWEI] bgp 100 [*HUAWEI-bgp] peer 2001:DB8:1::1 as-number 100 [*HUAWEI-bgp] ipv4-family unicast [*HUAWEI-bgp-af-ipv4] ext-community-change enable [*HUAWEI-bgp-af-ipv4] peer 2001:DB8:1::1 enable [*HUAWEI-bgp-af-ipv4] peer 2001:DB8:1::1 advertise-ext-community [*HUAWEI-bgp-af-ipv4] peer 2001:DB8:1::1 advertise link-bandwidth transitive