How to use the Debugging tools and how to check the Debugging information are very important to maintenance engineer when they deal with failures.
Debugging information switch
Before open the debugging switch, need analysis fault phenomena, judge the modules need to be debugged.
Open the debugging switch will affect equipment performance. Only when needs to locate fault, it is necessary to open the debugging switch, and cannot be used for monitoring of normal network operation.
Please careful use the debugging switch with the key word “all”. After the debug, should implement the “undo debugging all” command to close all debugging switches. Use it in the slack period of network as far as possible, in order to reduce the influence of the debugging command to system.
Note: In user view execute debugging can open the designated debugging information, such as to open ICMP debugging switch:
Info:Current terminal debugging is on
Info:Current terminal monitor is on
debugging ip icmp
Use display debugging command can view opened what debugging switch.
OSPF global debugging state:
OSPF EVENT debugging is on
OSPF LSA debugging is on
ARP packet debugging is on
IP icmp debugging is on
Debugging information format
Debugging information start with symbol "*",
Debugging command is an important tool to system maintenance engineer maintenance equipment, locate fault. In the network equipment failure, the system maintenance engineer through open Debugging command switch, can track the operation process of the business and find the cause of the problem.
Debugging tools need the users have certain technical basis, compared with display methods it is much easier to find the fault appeared in protocol interaction.
For a post sales engineer, can very skilled use the Debugging tools is very important to advance their own problems handling ability.