Alcatel-Lucent 7450 Manual page 273

Primary and Secondary Path Commands
primary
Syntax primary path-name
no primary
Context config>router>mpls>lsp
Description This command specifies a preferred path for the LSP. This command is optional only if the
secondary path-name is included in the LSP definition. Only one primary path can be defined for an
LSP.
Some of the attributes of the LSP such as the bandwidth, and hop-limit can be optionally specified as
the attributes of the primary path. The attributes specified in the primary path path-name command,
override the LSP attributes.
The no form of this command deletes the association of this path-name from the LSP lsp-name. All
configurations specific to this primary path, such as record, bandwidth, and hop limit, are deleted.
The primary path must be shutdown first in order to delete it. The no primary command will not
result in any action except a warning message on the console indicating that the primary path is
administratively up.
Default
none
Parameters path-name — The case-sensitive alphanumeric name label for the LSP path up to 32 characters in
secondary
Syntax [no] secondary path-name
Context config>router>mpls>lsp
Description
This command specifies an alternative path that the LSP uses if the primary path is not available. This
command is optional and is not required if the config router mpls lsp lsp-name primary path-name
command is specified. After the switch over from the primary to the secondary, the software
continuously tries to revert to the primary path. The switch back to the primary path is based on the
retry-timer interval.
Up to eight secondary paths can be specified. All the secondary paths are considered equal and the
first available path is used. The software will not switch back among secondary paths.
Software starts the signaling of all non-standby secondary paths at the same time. Retry counters are
maintained for each unsuccessful attempt. Once the retry limit is reached on a path, software will not
attempt to signal the path and administratively shuts down the path. The first successfully established
path is made the active path for the LSP.
The no form of this command removes the association between this path-name and lsp-name. All
specific configurations for this association are deleted. The secondary path must be shutdown first in
7450 ESS MPLS Guide
length.
MPLS and RSVP
Page 273