mpls rsvp-te challenge-lost

Function

The mpls rsvp-te challenge-lost command sets the maximum number of times that the authenticator allows itself to retransmits Challenge messages during RSVP authentication.

The undo mpls rsvp-te challenge-lost command restores the default setting.

By default, the number of times for retransmitting Challenge messages is 3.

Format

mpls rsvp-te challenge-lost max-miss-times

undo mpls rsvp-te challenge-lost

Parameters

Parameter	Description	Value
max-miss-times	Specifies the number of times for retransmitting Challenge messages.	The value is an integer that ranges from 1 to 10. The default value is 3.

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 times for sending Challenge messages. In addition, you can use the mpls rsvp-te retrans-timer challenge command to change the interval for retransmitting Challenge messages.

Example

# Set the number of times for retransmitting Challenge messages to 5.

<HUAWEI> system-view
[HUAWEI] mpls
[HUAWEI-mpls] mpls rsvp-te challenge-lost 5