The most common mistake in troubleshooting
is not the inability to use commands but the laxity in the examination of
entries and configuration. Solving network problems requires careful and proper
examination of routing entries and configuration.
There are several useful router commands to
verify NAT translations. Cisco routers
are equipped with NAT verifying tools.
1. The command: show ipnat
translations display the details of NAT assignments; it will enable you to
verify that correct translations exist in the translation table. It’s
recommended that you clear any dynamic NAT translation entries that might still
be on the router.
2. To view additional details about
each translation us the following command;
R1#show ipnat translation sverbose
This command will display additions
information, which includes creation dates and usage of each translation.
To clear NAT translations use the
command: clear ipnat translation
e.g.
R1#clear ipnat translation
|
3.Verify the operations of NAT by checking
details about every packet that is translated by the router. To view this
information use the:
R1#debug ipnat or
R1#debug ipnat detailed
The later command debug ipnat detailed
Provide a description of each packet that had been considered for translation.
It also displays information on some errors such as failure to assign a global
IP address.cisco product
4.The show ipnat statistics command
display:
Details of all the active translation entries
NAT configuration parameters
Number of IP addresses in the pool
Total number of assigned IP addresses.
Another useful command for NAT verification
is the show run command. With this command, you can view the;
Access command lists
Interfaces and other configurations
The most common mistake in troubleshooting
is not the inability to use commands but the laxity in the examination of
entries and configuration.
