CHAPTER 13
13.Fault Analysis and Solution
13.1.Problem Location & Information Collection
In usual cases, the system should be timely checked for problem location and solution when it is abnormal.And the information should be collected for relevant personnel for further analysis and solution or serving as the reference documents for the system maintenance.
13.1.1.General Check
Step 1 Record the result information of the following information: show version
show
show
show task: Check whether the task is normally run
show slab mod: Check the allocation and use of memory
show slab global: Check the use of memory
Show sysattack: Check the cases of the system being attacked
13.1.2.Layer-2 Check
If some ports on a network segment are blocked, check Layer 2 first:
Step | show port {[all<portlist>]}*1 | Check the status of ports, the up/down |
1 |
| status of ports and the rate, duplex, flow |
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| control and |
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| ports. |
Step | show fdb | View the software FDB table, and whether |
2 |
| the MAC address of subscribers and the |
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| MAC address of the peer router have been |
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| learnt, and the ports and Vlan Name are |
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| correct |
Step | show vlan | Check whether the VLAN configuration of |
3 |
| software is correct, especially the |
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| correctness of the VLAN configuration with |
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| the upstream equipment, including |
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| whether the connection port is correctly |
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| added and the tag value is correctly |
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| configured. |
3P@C Installation Manual
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