Virtual Interface

Let us learn about virtual interface.
A Virtual Interface enables the combination of two physical ports into one logical interface. Virtual Interfaces provide increased redundancy in areas of the network where uptime is critical and additional design flexibility is needed.
A Virtual Interface can contain a maximum of two member interfaces and is used to ensure redundant physical connectivity from a device to one or more switches, routers, or firewalls. For example, two controller ports may be connected to two Layer 2 switches for physical redundancy of controller port connectivity.
In order for a port to be an eligible Virtual Interface member it must be a:
  • Physical port—Cannot be a bypass pair nor a logical interface.
  • Similar port type—For example, a controller port can only be added to a virtual interface with another controller port.
  • Default configuration—The interface cannot have any type of IP, sub-interface, used-for, circuit label, nor PPPoE configuration.
A virtual interface can be created, updated, or deleted. It displays as Down if both the member interfaces are operationally down, and Up if at least one of the member interfaces is operationally up.

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