Cisco CCNA (200-301)IP ServicesMedium
An administrator is observing network performance issues, specifically high latency for real-time applications. They suspect that Network Address Translation (NAT) is contributing to the delay. Which command can the administrator use on a Cisco router to view the active NAT translations and troubleshoot potential bottlenecks?
- Ashow ip nat session
- Bshow ip nat mappings
- Cshow ip nat statistics
- Dshow ip nat translations verbose
Show answer & explanationAnswer & explanation
Correct answer: D. show ip nat translations verbose
The 'show ip nat translations verbose' command provides detailed information about active NAT translations, including timers, protocol, and port details. This level of detail is crucial for identifying specific sessions that might be causing high latency or resource exhaustion.
Why the other options are wrong
- A. This command is not a standard Cisco IOS command for showing NAT translations.
- B. This command is not a standard Cisco IOS command for showing NAT translations.
- C. This command shows NAT statistics (e.g., total hits, misses, expired translations) but not individual active translations.
View Active NAT Translations
On a Cisco router, the 'show ip nat translations' command displays active NAT translation entries. Adding 'verbose' provides more detailed information for troubleshooting.
- Essential for verifying NAT operation.
- Shows private-to-public IP/port mappings.
- 'verbose' option adds timers, protocol, and other details.
- Helps identify resource usage and potential issues.
Memory trick: Show NAT translations, verbose for details!