mpls rsvp-te retrans-timer challenge

Function

The mpls rsvp-te retrans-timer challenge command configures the interval at which a Challenge message is retransmitted.

The undo mpls rsvp-te retrans-timer challenge command restores the default value.

The interval at which a Challenge message is retransmitted is set to 1000 milliseconds by default.

Format

mpls rsvp-te retrans-timer challenge retransmission-interval

undo mpls rsvp-te retrans-timer challenge

Parameters

Parameter	Description	Value
retransmission-interval	Specifies the interval at which a Challenge message is retransmitted.	An integer ranging from 500 to 10000 in milliseconds. The value is 1000 milliseconds by default.

Views

MPLS view

Default Level

2: Configuration level

Usage Guidelines

Assume node A and node B are RSVP neighbors and they need to authenticate each other. Node A authenticates node B as follows:

Node A sends an RSVP message carrying an Integrity object to node B.
When node B receives the message and detects that the key ID of node A is different from that in the Integrity object, node B sends a Challenge message to node A and starts a timer determining the time interval at which the Challenge message will be periodically retransmitted, and records the number of retries.
When node A receives the Challenge message from node B, it directly copies the Challenge object in a message and adds its Integrity object to the message to generate a Response message to be sent to node B.
When node B receives the Response message from node A, it checks whether the Challenge object in the Response message is consistent with the local Challenge object.
- If the Challenge objects are consistent, node B stops and resets the timer for sending Challenge messages. Then, the authentication is successful.
- If the Challenge message timer expires before node B receives the Response message, the authentication fails.

You can run the mpls rsvp-te challenge-lost command to change the maximum number of attempts to send Challenge messages. In addition, you can use the mpls rsvp-te retrans-timer challenge command to change the interval at which a Challenge message is retransmitted.

Example

# Set the interval for retransmitting a Challenge message to 800 ms.

<HUAWEI> system-view
[HUAWEI] mpls
[HUAWEI-mpls] mpls rsvp-te retrans-timer challenge 800