How to Troubleshoot Static Routes on Cisco IOS Device: show ip route, ping, and debug ip packet Commands.

Which three IOS troubleshooting commands can help to isolate problems with a static route?

show ip route

1. “show ip route” command: This command displays the routing table on the Cisco IOS device and allows you to verify if the static route is present and correctly configured.

Look for the static route entry and check if the next hop address or interface is correct.

Example output:
“`
Router# show ip route

S 10.0.0.0/8 [1/0] via 192.168.1.1

“`

2. “ping” command: Use this command to verify connectivity and reachability to the destination specified in the static route. If ping is successful, it suggests that the static route is working correctly. If not, investigate any network or connectivity issues that may be causing the problem.

Example output:
“`
Router# ping 10.0.0.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/5 ms
“`

3. “debug ip packet” command: This command enables packet debugging and provides detailed information about the packets going through the device. With this command, you can see if the static route is being used correctly and if any packets are being dropped or denied.

Example output:
“`
Router# debug ip packet
IP packet debugging is on

“`

Be cautious when using this command in production environments as it can have a performance impact and generate a large amount of debug output.

Remember to disable debugging after troubleshooting using the “no debug ip packet” command.

More Answers:
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