When LDP is enabled, targeted sessions can be established to create remote adjacencies with nodes that are not directly connected. When service distribution paths (SDPs) are configured, extended discovery mechanisms enable LDP to send periodic targeted hello messages to the SDP’s far-end point. The exchange of LDP hellos trigger session establishment. The SDP’s signaling default enables tldp. The service SDP uses the targeted-session parameters configured in the config>router>ldp>targeted-session context.
The following example displays the command syntax usage to configure enable LDP on an MPLS SDP.
config>service>sdp#
signaling {off|tldp}
The following displays an example of an SDP configuration showing the signaling default tldp enabled.
A:ALA-1>config>service>sdp# info detail
----------------------------------------------
description "MPLS: to-99"
far-end 10.10.10.99
lsp A_D_1
signaling tldp
path-mtu 4462
keep-alive
hello-time 10
hold-down-time 10
max-drop-count 3
timeout 5
no message-length
no shutdown
exit
no shutdown
----------------------------------------------
A:ALA-1>config>service>sdp#