Ldp Signaling And Services - Alcatel-Lucent 7450 Manual

LDP Signaling and Services

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
far-end point. The exchange of LDP hellos trigger session establishment. The SDP signaling
default enables tldp. The service SDP uses the targeted-session parameters configured in the
config>router>ldp>targeted-session context.
The SDP LDP and LSP commands are mutually exclusive; either one LSP can be specified or
LDP can be enabled. If LDP is already enabled on an MPLS SDP, then an LSP cannot be specified
on the SDP. If an LSP is specified on an MPLS SDP, then LDP cannot be enabled on the SDP.
To enable LDP on the SDP when an LSP is already specified, the LSP must be removed from the
configuration using the no lsp lsp-name command. For further information about configuring
SDPs, refer to the SR OS Services Guide.
The following example displays the command syntax usage to configure enable LDP on an MPLS
SDP:
CLI Syntax: config>service>sdp#
The following displays an example of an SDP configuration showing the signaling default
enabled.
A:ALA-1>config>service>sdp# info detail
----------------------------------------------
----------------------------------------------
A:ALA-1>config>service>sdp#
7450 ESS MPLS Guide
ldp
signaling {off|tldp}
description "MPLS: to-99"
far-end 10.10.10.99
ldp
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
Label Distribution Protocol
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tldp