Alcatel-Lucent 7450 Manual page 660

Default
Parameters
tunneling
Syntax
Context
Description
Default
Page 660
Link LDP sessions to all peers discovered over a given LDP interface share the same local LSR-ID.
However, LDP sessions on different LDP interfaces can use different network interface addresses as
their local LSR-ID.
By default, the LDP session to a peer uses the system interface address as the LSR-ID unless
explicitly configured using the above command. 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.
At initial configuration, the LDP session to a peer will remain down while the network interface used
as LSR-ID is down. LDP will not try to bring it up using the system interface.
At any time the network IP interface used as LSR-ID goes down, the LDP sessions to all discovered
peers using this LSR-ID go down.
If the user changes the LSR-ID value on the fly between system, interface, and interface-name while
the LDP session is up, LDP will immediately tear down all sessions using this LSR-ID and will
attempt to re-establish them using the new LSR-ID.
Note that when an interface other than system is used as the LSR-ID, the transport connection (TCP)
for the link LDP session will also use the address of that interface as the transport address. If system
or interface value is configured in the configure>router>ldp>interface-
parameters>interface>ipv4/ipv6>transport-address context, it will be overridden.
The no form of the command returns to the default behavior in which case the system interface
address is used as the LSR-ID.
no local-lsr-id
interface-name — Specifies the name, up to 32 character in length, 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.
[no] tunneling
config>router>ldp>targ-session>peer
config>router>ldp>targ-session>peer-template
This command enables LDP over tunnels.
The no form of the command disables tunneling.
no tunneling
7450 ESS MPLS Guide