mandatory-chap on-mismatch challenge-length

Function

The mandatory-chap on-mismatch challenge-length command configures an LNS to forcibly perform LCP renegotiation if the ICCN packets sent by an LAC carry the Challenge attribute longer than 16 bytes.

The undo mandatory-chap on-mismatch challenge-length command restores the default configuration.

By default, an LNS does not forcibly perform LCP renegotiation if the ICCN packets sent by an LAC carry the Challenge attribute longer than 16 bytes.

This command is supported only on the NetEngine 8000 F1A.

Format

mandatory-chap on-mismatch challenge-length

undo mandatory-chap on-mismatch challenge-length

Parameters

None

Views

L2TP group view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
l2tp	write

Usage Guidelines

Usage Scenario

When the device functions as an LNS and receives ICCN packets with the Challenge attribute longer than 16 bytes from an LAC, the LNS sends the packets to the RADIUS server for authentication. If the RADIUS server can only identify the Challenge attribute with 16 bytes, the authentication fails. In this case, run the mandatory-chap on-mismatch challenge-length command to configure the LNS to forcibly perform LCP renegotiation with users. Then the LNS generates the 16-byte Challenge attribute.

Precautions

This command must be run on an LNS.

Example

# Configure an LNS to forcibly perform LCP renegotiation if the ICCN packets sent by an LAC carry the Challenge attribute longer than 16 bytes.

<HUAWEI> system-view
[~HUAWEI] l2tp-group group1
[*HUAWEI-l2tp-group1] mandatory-chap on-mismatch challenge-length