Which configuration correctly enforces one VoIP phone and one device on Aruba CX 6300?

Which configuration correctly enforces one VoIP phone and one device on Aruba CX 6300?

• A. interface 1/1/1 aaa authentication port-access client-limit 2 aaa authentication port-access auth-mode client-mode
• B. interface 1/1/1 aaa authentication port-access auth-mode multi-domain
• C. interface 1/1/1 aaa authentication port-access client-limit multi-domain 2 aaa authentication port-access auth-mode multi-domain
• D. interface 1/1/1 aaa authentication port-access client-limit 1 aaa authentication port-access auth-mode device-mode

Answer: (C)

On a port that will carry both a VoIP phone and a PC, you need port-access in a mode that supports two separate endpoints and you must allow two devices to attach. Using multi-domain authentication lets the switch treat the phone and the PC as two distinct endpoints on the same port, typically placing the phone in the voice/domain side and the PC in the data side. To actually permit both devices, you also specify a client limit of 2, so the port can authorize two clients simultaneously. So this configuration correctly enables two endpoints (the phone and the PC) on one port by combining multi-domain authentication with a two-client limit. The other options either use an authentication mode that supports only a single device, or omit the necessary limit for two devices, or mix modes in a way that doesn’t accommodate both devices on the same port.

On a port that will carry both a VoIP phone and a PC, you need port-access in a mode that supports two separate endpoints and you must allow two devices to attach. Using multi-domain authentication lets the switch treat the phone and the PC as two distinct endpoints on the same port, typically placing the phone in the voice/domain side and the PC in the data side. To actually permit both devices, you also specify a client limit of 2, so the port can authorize two clients simultaneously.

So this configuration correctly enables two endpoints (the phone and the PC) on one port by combining multi-domain authentication with a two-client limit. The other options either use an authentication mode that supports only a single device, or omit the necessary limit for two devices, or mix modes in a way that doesn’t accommodate both devices on the same port.