How To | Configure WAN Load Balancing
■With the increasing use of the Internet to service core business functions comes the need for reliable WAN connectivity. A specific aspect of this requirement is for reliable connectivity to particular destinations. A simple and effective method of achieving this is to provide alternative network connections via different Internet Service Providers (ISPs). In this way an outage limited to one network will not result in a loss of connectivity to the essential sites.
■When a router simultaneously connects to multiple ISPs, the WAN load balancer tries to distribute the router traffic equally across each network interface.
■You can instead achieve connectivity via multiple WAN interfaces by using routing protocols such as RIP, OSPF or BGP, but such protocols usually choose their routing paths on the basis of metrics instead of dynamic load conditions. A router with two WAN ports connected to different ISPs would route most of its traffic via the port that offered the best metric. This provides alternative connectivity if an ISP fails, but under normal operating conditions, it wastes the alternative port’s bandwidth. WAN load balancing overcomes this limitation.
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AR400 series 、 AR700 series 、 AR400 、 AR700 、 Rapier 48w 、 Rapier i |
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User's Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2008/1/11 |
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REV B |
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C613-16064-00 |
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156 KB |
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