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.
For details about the RSVP Hello extension mechanism, see RFC 3209.
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.
- Run quit
Return to the system view.
- Run interface interface-type interface-number
The interface view of the RSVP-TE-enabled interface is displayed.
- (Optional) 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.
Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support switching between Layer 2 and Layer 3 modes.
- Run mpls rsvp-te hello
The RSVP Hello extension function is enabled on the interface.