Какую производительность маршрутизации можно ожидать при использовании Cisco ios nat?

Cisco IOS NAT supports Cisco Express Forwarding switching, fast switching, and process switching. For 12.4T release and later, fast-switching path is no longer supported. For Cat6k platform, the switching order is Netflow (HW switching path), CEF, process path.

Performance depends on several factors:

• The type of application and its type of traffic
• Whether IP addresses are embedded
• Exchange and inspection of multiple messages
• Source port required
• The number of translations
• Other applications running at the time
• The type of hardware and processor