How IP Gateway weights and preference groups work

Products

• ProxySG Software - SGOS

Issue/Introduction

How IP Gateway weights and preference groups work
You want to know how IP Gateway weights and preference groups work

Resolution

Which gateway the ProxySG chooses to use is determined by the assignment of preference groups to default gateways. You can define multiple gateways within the same preference group. A ProxySG can have from 1 to 10 preference groups.

Initially, all gateways in the lowest preference group are considered as the active gateways. If a gateway becomes unavailable, it is dropped from the active gateway list, but the remaining gateways in the preference group continue to be used. If a gateway in a lower preference group becomes available again, it is then used as the active gateway. If all gateways in the lowest preference group become unreachable, the gateways in the next lowest preference group become the active gateways.

In addition to a preference group, each gateway within a group can be assigned a relative weight value from 1 to 100. The weight value determines how much bandwidth a gateway is given relative to the other gateways in the same group. For example, in a group with two gateways, assigning both gateways the same weight value, whether 1 or 100, results in the same traffic distribution pattern. In a group with two gateways, assigning one gateway a value of 10 and the other gateway a value of 20 results in the ProxySG sending approximately twice the traffic to the gateway with a weight value of 20.

Gateways can be configured in the Management Console by going to Configuration > Network > Routing > Gateways.