Configuring an LDP Label Advertisement Filter
To configure an LDP label advertisement filter, use the
following command:
configure
mpls ldp advertise [{direct [all | lsr-id | none]} | {rip [all | none] | {static [all | none]}
This command configures a filter to be used by LDP when originating
unsolicited label mapping advertisements to LDP neighbors.
You can configure how the direct advertisement filter is applied, as
follows:
- direct—The advertisement filter is applied to the FECs
associated with direct routes.
- rip—The advertisement filter is applied to the FECs associated
with RIP (Routing Information Protocol) routes.
- static—The advertisement filter is applied to the FECs
associated with static routes.
You can configure the advertisement filter, as follows:
- all—Unsolicited label mappings are originated for all routes of
the specified type (direct, RIP, or static).
- lsr-id—An unsolicited label mapping is originated if a /32
direct route exists that matches the MPLS (Multiprotocol Label Switching) LSR ID. This
filter is the default setting for direct routes and is only available for direct
routes.
- none—No unsolicited label mappings are originated for all routes
of the specified type. This is the default setting for RIP and static routes.
You can control the number of labels advertised using the configure
mpls ldp advertise command. Advertising labels for a large number
of routes can increase the required number of labels that must be
allocated by LSRs. Care should be used to insure that the number
of labels advertised by LERs does not overwhelm the label capacity
of the LSRs.
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