Label Distribution Protocol
7450 ESS MPLS Guide Page 527
Cleanup
LDP closes all sockets, frees all memory, and shuts down all its tasks when it is deleted, so its
memory usage is 0 when it is not running.
Configuring Implicit Null Label
The implicit null label option allows an egress LER to receive MPLS packets from the previous
hop without the outer LSP label. The user can configure to signal the implicit operation of the
previous hop is referred to as penultimate hop popping (PHP). This option is signaled by the
egress LER to the previous hop during the FEC signaling by the LDP control protocol.
Enable the use of the implicit null option, for all LDP FECs for which this node is the egress LER,
using the following command:
config>router>ldp>implicit-null-label
When the user changes the implicit null configuration option, LDP withdraws all the FECs and re-
advertises them using the new label value.
Global LDP Filters
Both inbound and outbound LDP label binding filtering are supported.
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