VLAN (on the Switching Interface) The Branch Gateway switch can have multiple VLANs defined within its switching fabric. The Branch Gateway router supports up to 64 VLANs that can be configured over their internal switching interface connections.

Serial Interface The Serial interface is a virtual interface that is created over a portion of an E1/T1 or USP port. Serial interfaces support PPP and frame relay encapsulation protocols. For more information about configuring Serial interfaces for a WAN, see Configuring the initial WAN.

Dialer Interface The Dialer interface is used for the modem dial-backup feature. Refer to Modem dial backup.