Configuring RSVP Hello Extension
Context
The RSVP Hello extension mechanism is used to fast detect reachability of RSVP neighbors. When the mechanism detects that a neighboring RSVP node is unreachable, the MPLS TE tunnel is torn down.
Perform the following configurations on each node of the MPLS TE tunnel.
Procedure
- Run system-view
The system view is displayed.
- Run mpls
The MPLS view is displayed.
- Run mpls rsvp-te hello
RSVP Hello extension function is enabled on this node.
By default, the RSVP hello extension is disabled.
- Run mpls rsvp-te hello-lost times
The permitted maximum number of dropped Hello messages is set.
When the RSVP Hello extension is enabled, by default, Hello ACK messages cannot be received for consecutive three times, exceeding which the link is regarded as faulty, and the TE tunnel is torn down.
- Run mpls rsvp-te timer hello interval
The interval for sending Hello messages is set.
When the RSVP Hello extension is enabled, by default, the interval of Hello message is 3 seconds.
If the interval is modified, the modification takes effect after the timer expires.
The timer must be longer than the time a device takes to perform a master/slave main control board switchover. If the timer is set to less than the switchover time, a protocol intermittent interruption occurs during a switchover. The default timer value is recommended.
- Run quit
Return to the system view.
- Run interface interface-type interface-number
The interface view of the RSVP-TE-enabled interface is displayed.
- On an Ethernet interface, run undo portswitch
The interface is switched to Layer 3 mode.
By default, an Ethernet interface works in Layer 2 mode.
The mode switching function takes effect when the interface only has attribute configurations (for example, shutdown and description configurations). Alternatively, if configuration information supported by both Layer 2 and Layer 3 interfaces exists (for example, mode lacp and lacp system-id configurations), no configuration that is not supported after the working mode of the interface is switched can exist. If unsupported configurations exist on the interface, delete the configurations first and then run the undo portswitch command.
If many Ethernet interfaces need to be switched to Layer 3 mode, run the undo portswitch batch interface-type { interface-number1 [ to interface-number2 ] } &<1-10> command in the system view to switch these interfaces to Layer 3 mode in batches.
- Run mpls rsvp-te hello
The RSVP Hello extension function is enabled on the interface.
- Run commit
The configuration is committed.
