Alcatel-Lucent 7210 SAS M User Manual page 281

By default, a T-LDP session uses the system interface address as the LSR-ID. Note however that the
system interface must always be configured on the router or the LDP protocol will not come up on the
node. There is no requirement to include it in any routing protocol though.
At initial configuration, the T-LDP session will remain down while the specified interface is down.
LDP will not try to bring it up using the system interface.
If the user changes the LSR-ID on the fly while the T-LDP session is up, LDP will immediately tear
down the session and will attempt to establish one using the new LSR-ID regardless of operational
state of new specified interface.
If the interface used as LSR-ID goes down, then the T-LDP session will go down.
The user configured LSR-ID is used exclusively for extended peer discovery to establish the T-LDP
hello adjacency. It is also used as the transport address for the TCP session of the LDP session when it
is bootstrapped by the T-LDP hello adjacency. The user configured LSR-ID is however not used in
basic peer discovery to establish a link-level LDP hello adjacency.
The no form of this command returns to the default behavior in which case the system interface
address is used as the LSR-ID.
Default
no local-lsr-id
Parameters interface-name — The name of the network IP interface. An interface name cannot be in the form of
an IP address. If the string contains special characters (#, $, spaces, etc.), the entire string must be
enclosed within double quotes.
interface-parameters
Syntax interface-parameters
Context config>router>ldp
Description
This command enables the context to configure LDP interfaces and parameters applied to LDP
interfaces.
bfd-enable
Syntax bfd-enable
no bfd-enable
Context config>router>ldp>targ-session
config>router>ldp>targ-session>peer
Description
This command enables the use of bi-directional forwarding (BFD) to control the state of the
associated protocol interface. By enabling BFD on a given protocol interface, the state of the protocol
interface is tied to the state of the BFD session between the local node and the remote node. The
parameters used for the BFD are set via the BFD command under the IP interface.
The no form of this command removes BFD from the associated IGP/BGP protocol adjacency.
Default
no bfd-enable
7210 SAS M, T, X, R6, Mxp MPLS Configuration Guide
Values 1 to 32 alphanumeric characters.
LDP Configuration Commands
Page 281