A NetScaler functioning as an L2 device is said to operate in L2 mode. In L2mode, the NetScaler forwards packets between network interfaces when all of thefollowing conditions are met:
â€¢ The packets are destined to another device’s media access control (MAC)address.
â€¢ The destination MAC address is on a different network interface.
â€¢ The network interface is a member of the same virtual LAN (VLAN).
By default all network interfaces are members of a pre-defined VLAN, VLAN 1. Address Resolution Protocol (ARP) requests and responses are forwarded to all network interfaces that are members of the same VLAN. To avoid bridging loops,L2 mode must be disabled if another L2 device is working in parallel with theNetScaler.