Monday, January 21, 2008

IOS NAT Load-balancing for Two ISP Connections

IOS NAT Load-balancing for Two ISP Connections #99427 [IP Addressing Services] - Cisco Systems
This document describes a configuration for a Cisco IOS® router to connect a network to the Internet with Network Address Translation through two ISP connections. The Cisco IOS Software Network Address Translation (NAT) can distribute subsequent TCP connections and UDP sessions over multiple network connections if equal-cost routes to a given destination are available. In the event that one of the connections becomes unusable, object-tracking, a component of Optimized Edge Routing (OER), can be used to deactivate the route until the connection becomes available again, which assures network availability in spite of instability or unreliability of an Internet connection.
IOS NAT Load-balancing for Two ISP Connections (pdf)

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