User's Manual

Troubleshooting
Pinging to Test LAN Connectivity
Cisco ISA500 Series Integrated Security Appliance Administrator Guide 337
A
Pinging to Test LAN Connectivity
Most TCP/IP terminal devices and security appliances contain a ping utility that
sends an ICMP echo-request packet to the designated device. The device
responds with an echo reply. Troubleshooting a TCP/IP network is made very easy
by using the ping utility in your PC or workstation.
This section includes the following topics:
• Testing the LAN Path from Your PC to Your Security Appliance,
page 337
• Testing the LAN Path from Your PC to a Remote Device, page 338
Testing the LAN Path from Your PC to Your Security
Appliance
STEP 1 On your PC, click the Windows Start button, and then click Run.
STEP 2 Type ping <IP_address-> where <IP_address-> is the IP address of the security
appliance. Example: ping 192.168.1.1.
STEP 3 Click OK.
STEP 4 Observe the display:
• If the path is working, you see this message sequence:
Pinging <IP address-> with 32 bytes of data
Reply from <IP address->: bytes=32 time=NN ms TTL=xxx
• If the path is not working, you see this message sequence:
Pinging <IP address-> with 32 bytes of data
Request timed out
STEP 5 If the path is not working, test the physical connections between the PC and the
security appliance:
• If the LAN port LED is off, verify that the corresponding link LEDs are lit for
your network interface card and for any hub ports that are connected to your
workstation and security appliance.
STEP 6 If the path is still not up, test the network configuration: