Alcatel-Lucent 7450 Manual page 268

MPLS Commands
main-ct-retry-limit
Syntax main-ct-retry-limit number
no main-ct-retry-limit
Context config>router>mpls>lsp
Description
This command configures the maximum number of retries the LSP primary path should be retried
with the LSP Diff-Serv main Class Type (CT).
When an unmapped LSP primary path goes into retry, it uses the main CT until the number of retries
reaches the value of the new main-ct-retry-limit parameter. If the path did not come up, it must start
using the backup CT at that point in time. By default, this parameter is set to infinite value. The new
main-ct-retry-limit parameter has no effect on an LSP primary path which retries due to a failure
event.
An unmapped LSP primary path is a path which has never received a Resv in response to the first
Path message sent. This can occur when performing a "shut/no-shut" on the LSP or LSP primary path
or when the node reboots. An unmapped LSP primary path goes into retry if the retry timer expired or
the head-end node received a PathErr message before the retry timer expired.
If the user entered a value of the main-ct-retry-limit parameter that is greater than the value of the
LSP retry-limit, the number of retries will still stop when the LSP primary path reaches the value of
the LSP retry-limit. In other words, the meaning of the LSP retry-limit parameter is not changed and
always represents the upper bound on the number of retries. The unmapped LSP primary path
behavior applies to both CSPF and non-CSPF LSPs.
The no form of this command sets the parameter to the default value of zero (0) which means the LSP
primary path will retry forever.
Default no main-ct-retry-limit
Parameters number — The number of times MPLS will attempt to re-establish the LSP primary path using the
metric
Syntax [no] metric metric
Context config>router>mpls>lsp
Description This command allows the user to override the LSP operational metric with a constant administrative
value that will not change regardless of the actual path the LSP is using over its lifetime.
The LSP operational metric will match the metric the active path of this LSP is using at any given
time. For a CSPF LSP, this metric represents the cumulative IGP metric of all the links the active path
is using. If CSPF for this LSP is configured to use the TE metric, the LSP operational metric is set to
the maximum value. For a non-CSPF LSP, the operational metric is the shortest IGP cost to the
destination of the LSP.
The LSP operational metric is used by some applications to select an LSP among a set of LSPs that
are destined to the same egress router. The LSP with the lowest operational metric will be selected. If
Page 268
Diff-Serv main CT. Allowed values are integers in the range of zero (0) to 10,000, where zero
indicates to retry infinitely.
Values 0-1000, integer
7450 ESS MPLS Guide