Configuring RSVP-TE Refresh Mechanism
Context
Enabling Srefresh in the interface view or the mpls view on two nodes that are the neighbors of each other can reduce the cost and improve the performance of a network. In the interface view, Srefresh can be enabled only on this interface; in the MPLS view, Srefresh can be enabled on the entire device. After Srefresh is enabled, the retransmission of Srefresh messages is automatically enabled on the interface or the device.
Assume that a node initializes the retransmission interval as Rf seconds. If receiving no ACK message within Rf seconds, the node retransmits the RSVP message after (1 + Delta) x Rf seconds. The value of Delta depends on the link rate. The node retransmits the message until it receives an ACK message or the times of retransmission reach the threshold (that is, retransmission increment value).
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 srefresh
Srefresh is enabled.
- (Optional) Run mpls rsvp-te timer retransmission { increment-value increment | retransmit-value interval } *
The retransmission parameters are set.
By default, the increment value is 1, and the interval is 5000 milliseconds.
- (Optional) Enabling the summary refresh (Srefresh) compatibility.
- 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.
- On an Ethernet interface, run undo portswitch
- Run commit
The configuration is committed.
