Alcatel-Lucent 7450 Manual page 667

transport-address
Syntax transport-address {interface | system}
no transport-address
Context config>router>ldp>interface-parameters>interface>ipv4
config>router>ldp>interface-parameters>interface>ipv6
config>router>ldp>interface-parameters>ipv4
config>router>ldp>interface-parameters>ipv6
Description This command configures the transport address to be used when setting up the LDP TCP sessions.
The transport address can be configured as interface or system. The transport address can be
configured globally (applies to all LDP interfaces) or per interface. The most specific value is used.
With the transport-address command, you can set up the LDP interface to the connection which can
be set to the interface address or the system address. However, there can be an issue of which address
to use when there are parallel adjacencies. This situation can not only happen with parallel links, it
could be a link and a targeted adjacency since targeted adjacencies request the session to be set up
only to the system IP address.
Note that the transport-address value should not be interface if multiple interfaces exist between
two LDP neighbors. Depending on the first adjacency to be formed, the TCP endpoint is chosen. In
other words, if one LDP interface is set up as transport-address interface and another for
transport-address system, then, depending on which adjacency was set up first, the TCP endpoint
addresses are determined. After that, because the hello contains the LSR ID, the LDP session can be
checked to verify that it is set up and then match the adjacency to the session.
Note that for any given ILDP interface, as the local-lsr-id parameters is changed to interface, the
transport-address configuration loses effectiveness. Since it will be ignored and the ILDP session
will always use the relevant interface IP address as transport-address even though system is chosen.
The no form of the command, at the global level, sets the transport address to the default value.
The no form of the command, at the interface level, sets the transport address to the value defined
under the global level.
Default system — The system IP address is used.
Parameters
interface — The IP interface address is used to set up the LDP session between neighbors. The
system — The system IP address is used to set up the LDP session between neighbors.
7450 ESS MPLS Guide
transport address interface cannot be used if multiple interfaces exist between two neighbors,
since only one LDP session is set up between two neighbors.
Interface Parameters Commands
Page 667