When enabling Layer 2 mode on two SDX instances sharing a network interface, what must be done to ensure traffic flows correctly?

When enabling Layer 2 mode on two SDX instances sharing a network interface, what must be done to ensure traffic flows correctly?

• A. Enable tagging on all interfaces
• B. Ensure Layer 3 and Layer 2 modes are enabled
• C. Enable MAC-based forwarding (MBF) mode
• D. Disable Layer 2 mode on a Citrix ADC instance

Answer: (A)

In Layer 2 mode with two SDX instances sharing a single network port, traffic must be separated by VLANs so each instance only sees its own frames. Enabling VLAN tagging on all interfaces ensures every Ethernet frame carries a VLAN ID, so the network and the SDX can route frames to the correct instance and keep traffic from different instances from mixing. With tagging, the upstream switch and the SDX can multiplex multiple instances over the same physical link without interference, and each instance processes only the frames tagged for its VLAN. Other options aren’t required for this scenario: you don’t need to enable both Layer 3 and Layer 2 modes to make L2 sharing work, and MAC-based forwarding isn’t a prerequisite for correct flow in this setup. Disabling Layer 2 would defeat the purpose of sharing the interface in the first place.

In Layer 2 mode with two SDX instances sharing a single network port, traffic must be separated by VLANs so each instance only sees its own frames. Enabling VLAN tagging on all interfaces ensures every Ethernet frame carries a VLAN ID, so the network and the SDX can route frames to the correct instance and keep traffic from different instances from mixing. With tagging, the upstream switch and the SDX can multiplex multiple instances over the same physical link without interference, and each instance processes only the frames tagged for its VLAN.

Other options aren’t required for this scenario: you don’t need to enable both Layer 3 and Layer 2 modes to make L2 sharing work, and MAC-based forwarding isn’t a prerequisite for correct flow in this setup. Disabling Layer 2 would defeat the purpose of sharing the interface in the first place.