NEC SV8500, Operation And Maintenance Manual

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CHAPTER 4 Fault Repair Procedures
1.2 LAN/WAN Communication Fault
System administrator needs to find out the fault part, define it and repair it in prompt. Administrator needs
to define the trouble part by localizing the trouble down to find out the trouble part when handling the net-
work failure for the system, peripheral equipment or other network equipment (Routers, Switches, etc.).
STEP 1 Localize the failure of communication line equipment, WLAN/LAN hardware and network en-
vironment.
STEP 2 Localize the failure of WAN/LAN equipment and its wiring.
STEP 3 Repair the failure part (equipment/change the parts or interim patch up).
Basic commands used to confirm the network equipment is listed below.
Note: Screens shown below are examples.
[PING]: Command to Confirm Physical Network Connection.
The “ping” command sends out the IP packets toward the desired Host to confirm the packet reach ability
and its reply. The status of IP packet is reported by using the ICMP (Internet Control Message Protocol).
Method: ping IP address (i.e.: ping 192.168.2.10)
C:\TEMP>ping 192.168.2.10
Pinging 192.168.2.10 with 32 bytes of data:
Reply from 192.168.2.10: bytes=32 time<10ms TTL=128
Reply from 192.168.2.10: bytes=32 time<10ms TTL=128
Reply from 192.168.2.10: bytes=32 time<10ms TTL=128
Reply from 192.168.2.10: bytes=32 time<10ms TTL=128
Ping statistics for 192.168.2.10:
Packet Sent=4, Received=4, Lost=0(0% loss)
Approximate round trip times in milli-seconds: