In Layer 2 mode, which action is appropriate to stabilize interface behavior when forwarding decisions are not tied to the device MAC address?

In Layer 2 mode, which action is appropriate to stabilize interface behavior when forwarding decisions are not tied to the device MAC address?

• A. Disable Layer 2 mode on the Citrix ADC instance.
• B. Enable tagging on all interfaces.
• C. Enable Layer 3 mode along with Layer 2 mode.
• D. Enable MAC-based forwarding mode.

Answer: (B)

In Layer 2 mode, stable interface behavior comes from giving traffic a clear VLAN context so forwarding isn’t left to MAC address learning alone. Enabling tagging on all interfaces provides that consistent VLAN tagging across every link, ensuring frames are classified and routed within the correct VLAN regardless of how MAC addresses are learned or changing over time. This reduces mis-forwarding and instability that can occur when forwarding decisions aren’t tied to device MAC addresses. Disabling Layer 2 would remove the L2 behavior altogether, which isn’t what you want for stable L2 operation. Layer 3 alongside Layer 2 isn’t necessary for this scenario and can complicate the forwarding model. Relying on MAC-based forwarding would contradict the premise that forwarding decisions aren’t tied to device MAC addresses, so tagging to enforce VLAN context is the right approach.

In Layer 2 mode, stable interface behavior comes from giving traffic a clear VLAN context so forwarding isn’t left to MAC address learning alone. Enabling tagging on all interfaces provides that consistent VLAN tagging across every link, ensuring frames are classified and routed within the correct VLAN regardless of how MAC addresses are learned or changing over time. This reduces mis-forwarding and instability that can occur when forwarding decisions aren’t tied to device MAC addresses.

Disabling Layer 2 would remove the L2 behavior altogether, which isn’t what you want for stable L2 operation. Layer 3 alongside Layer 2 isn’t necessary for this scenario and can complicate the forwarding model. Relying on MAC-based forwarding would contradict the premise that forwarding decisions aren’t tied to device MAC addresses, so tagging to enforce VLAN context is the right approach.