Q: How to enable the debugging switch?
A:
1. Old command line - VRP1.4\VRP1.5\VRP1.6
In configuration mode Quidway(config)#
Input:Quidway(config)#logging on
Quidway(config)#logging con (This command is enough in case of Console port. The logging mon command is also needed in case of Telnet.)
quidway#debug ppp packetCommon debugging switches:
> debug isdn q921
> debug isdn q931
> debug isdn cc (may not exist; does not matter)
After debugging, disable the debugging switch to save system resources!
2. New command line VRP1.74
Process:
[Router]info-center enable
Console port:
[Router]info-center console
[Router]info-center console debug
Telnet:
[Router]info-center monitor
[Router]info-center monitor debug
Take the debugging of PPP (link layer protocol) packets as an example:
[Router]debugging ppp packetNote:
1. In privilege mode, the display debug command can be used to see which debugging switches are enabled.
2. Enabling the debugging switch may affect the router performance to some extent. Therefore, disable the debugging switch promptly after debugging by using the command [Router]undo debug all or pressing Ctrl+D.
3.New command line VRP3.3
ter mon
ter debug
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How to enable the PPP debugging switch on the NE80 8011
debug lpu slotnum ppp subcardnum portnum
term debug
term monitor
set moni chan con
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