Allied Telesis AT-8900, RAPIER I, X900-48FE, AT-8700XL, AT-9900, AT-8600, AT-9800 L2TP Enhancements

82 L2TP Enhancements Release Note

L2TP Enhancements

This Software Version includes the following enhancements to Layer 2

Tunnelling Protocol:

■Decoding Debug Output and Setting a Time Limit for Debugging

■Resetting General L2TP Counters

■Handling PPP Link Negotiation Failures

This section describes the enhancements. The new and modified commands to implement them are described in Command Reference Updates.

Decoding Debug Output and Setting a Time Limit for

Debugging

This Software Version has improved the display options for the enable l2tp debug command with the addition of the decode and timeout parameters.

Decoding Output The new decode option allows you to display packet data in a human-readable format. This is an alternative to the undecoded hexadecimal format displayed when you specify pkt. Use the command:

enable l2tp debug=decode [call[=1..65535]tunnel[=1..65535]] [timeout=1..300]

The new decode option decodes control and payload messages into a human-readable format. For control packets, all of the message is decoded. For payload packets, only the header is decoded. The first 64 bytes of the encapsulated frame is also displayed, but remains in hexadecimal format. For an example of decoded control and payload packets, see the enable l2tp debug command in the Command Reference Updates section.

To disable decoded debugging for L2TP, use the command:

disable l2tp debug=decode [call[=1..65535]tunnel[=1..65535]]

Setting a Time Limit The new timeout parameter in the enable l2tp debug command allows you to set a time limit for how long L2TP debugging is enabled. This can be set to between 1 to 300 seconds. Once the limit is reached, all debugging modes for all calls and tunnels are automatically disabled. If this parameter is not set, then any debugging options that you enable produce debugging information until you explicitly turn them off by using the disable l2tp debug command.

To specify a time limit for how long debug information is produced, use the timeout parameter in the command:

enable l2tp debug={alldecodepktstate} [call[=1..65535]tunnel[=1..65535]] [timeout=1..300]

Software Version 2.8.1 C613-10477-00 REV B