In an Aruba CX VSX pair, which information does the Inter-Switch Link protocol configuration use?

In an Aruba CX VSX pair, which information does the Inter-Switch Link protocol configuration use?

• A. QSVI
• B. MAC tables
• C. UDLD
• D. RPBST+

Answer: (B)

In an Aruba CX VSX pair, the Inter-Switch Link is used to share forwarding state between the two switches, so how traffic is forwarded to devices on either side is based on MAC address information. The ISL configuration relies on the MAC tables learned on each switch and propagated across the interconnect, allowing the pair to act as a single logical switch. This lets frames destined for endpoints reachable through the other member be forwarded correctly without unnecessary flooding. Other options don’t fit because they refer to different mechanisms (for example, a virtual interface concept, a link-diagnostic protocol, or an unrelated feature), whereas MAC table coordination is what the ISL uses to keep forwarding consistent across the VSX pair.

In an Aruba CX VSX pair, the Inter-Switch Link is used to share forwarding state between the two switches, so how traffic is forwarded to devices on either side is based on MAC address information. The ISL configuration relies on the MAC tables learned on each switch and propagated across the interconnect, allowing the pair to act as a single logical switch. This lets frames destined for endpoints reachable through the other member be forwarded correctly without unnecessary flooding. Other options don’t fit because they refer to different mechanisms (for example, a virtual interface concept, a link-diagnostic protocol, or an unrelated feature), whereas MAC table coordination is what the ISL uses to keep forwarding consistent across the VSX pair.