SummaryWhen deploying the Exinda, though the most common topologies will be in line, it is possible to deploy the Exinda in an Out of Band Configuration, though there are limitations based on how it needs to be done
OverviewAn 'out of band' deployment is a topology where traffic doesn't need to flow through the Exinda to go from the LAN to the WAN. Traffic can flow directly from the switch to the local switch to the router and then out. However, in these cases, the Exinda is connected to the side of the main path, either in a configuration that will allow for the monitoring of traffic or, more advanced, still able to preform optimization and QoS based on the core router fowarding traffic to the Exinda and the Exinda forwarding it back.
There are three supported out of band topologies for the Exinda. They are as follows.
1. The Exinda connected to a router that is configured through Web Cache Communication Protocol (WCCP) v2.
2. The Exinda connected to a router that is configured to use Policy Based Routing (PBR)
3. The Exinda connected to a switch that has the port connected to the Exinda configured to use SPAN / Mirroring.
In the first two scenarios, the router will forward the information to the Exinda (based on either the configuration of the WCCPv2 or the PBR), which will examine the traffic in a way very similar to if it were inline, it will return information to the router and the router will shape the traffic accordingly before passing it to the destination. In the last scenario, the Exinda cannot preform any shaping of traffic because due to the way that Port Mirroring works, it can view the traffic, but has no logical knowledge that the traffic is being mirrored to it. In this case, reporting and monitoring will work as it does inline (with the exception of the Interfaces graph).
For more information on how to install an Exinda out of line, please look at this document on our support site. It covers the various deployments for PBR and how to set up WCCP or Port Mirroring for each topology. It also covers in line topologies that are possible to be done by the Exinda.