Network
E220 Series Cellular Router User Guide 119
Parameters Description
Protocol Select the protocols on which the rule is applicable.
Policy assigned Policy to be applied to the rule.
Currently Configured Policies Policy already applied to the rule.
Table 10.2-10: Edit Rule details of MWAN Interface
Concept of MWAN
Since E series have multiple sources of Internet, one or more sources of Internet could be used at the
same time. Using one source of Internet and failing over to another one by defining priorities is called
Failover. Once the source with a higher priority is online, the same will be used as a primary source of
internet
Priority can be defined by setting the Metric. Lower the metric, higher the priority.
When to failover and when to rollback is dependent on which interfaces are online and which
ones are offline. Online and offline interface status is based on the PING responses to a
particular server at a particular time interval. You can speed up the failover by sending PING
packets in a short interval and you can add reliability by adding multiple server candidates.
Load Balancing is where two or more sources of Internet are used at the same time and the
load which is essentially the connections is split between the multiple interfaces in the ratio of
their weights assigned.
E Series boasts of a feature called WAN affinity where a particular source IP, Destination IP
or a data type can be bound to a particular interface. For this, you need to set rules and apply
the rules to a particular policy. However you need to first have appropriate members which
correspond to physical interfaces in a particular policy.
So in a nutshell
• Members correspond to individual interfaces where you can set metric and weight
• Policy consists of a member or group of members
• Rules are to be applied to a policy
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