Nokia 7705 SAR-W Series Manual page 228

MPLS and RSVP-TE
implicit-null-label
Syntax implicit-null-label {enable | disable}
no implicit-null-label
Context config>router>rsvp>interface
Description This command enables or disables the use of the implicit null label over a specific RSVP-TE
interface.
The implicit null label is enabled for all LSPs for which the router is the eLER and for which
the PATH message is received from the previous-hop LSR over the RSVP-TE interface.
With facility backup, if the eLER is also the merge point (MP) node, the incoming interface for
the PATH refresh message over the bypass tunnel dictates whether the packet will use the
implicit null label. Similarly, with one-to-one backup, if the eLER is also the detour merge point
(DMP) node, the incoming interface for the PATH refresh message over the detour LSP
dictates whether the packet will use the implicit null label.
By default, an RSVP-TE interface inherits the RSVP-TE level configuration.
The interface must be shut down before this command can be used.
The no form of this command resets the interface to the RSVP-TE level configuration.
Default no implicit-null-label
Parameters enable — enables the implicit null label on the interface
disable — disables the implicit null label on the interface
refresh-reduction
Syntax [no] refresh-reduction
Context config>router>rsvp>interface
Description This command enables the use of the RSVP-TE overhead refresh reduction capabilities on
this RSVP-TE interface.
When this option is enabled, a 7705 SAR node will enable support for three capabilities:
The reliable message delivery must be explicitly enabled by the user after refresh reduction
is enabled. The other two capabilities are enabled immediately.
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• it will accept bundle RSVP-TE messages from its peer over this interface
• it will attempt to perform reliable RSVP-TE message delivery to its peer
• it will use summary refresh messages to refresh PATH and RESV states
Use subject to Terms available at: www.nokia.com
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MPLS Guide
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