Inline bypass switch protection comes in two forms: logical and physical. Both bypass switch options operate on the principle that traffic must continue, even if you don't have the power to inspect it.
A physical electrical bypass switch provides users with the ability to physically forward packets in the event of a Gigamon visibility node power failure. This bypass switch also allows you to perform maintenance and upgrade your tools without impacting network operation or downtime. Switching to protected mode occurs automatically and without software intervention upon the loss of power.
Logical bypass happens in the event of inline tool failure and forwards traffic either to other tools or to the network. The bypass-switch system detects failure when the link with that tool breaks down, the inline tool stops responding or during loss of software control, thus enabling you to safely remove or upgrade an inline appliance, or even move it from one network segment to another, without disrupting the network.