A critical alert from your network monitoring system indicates that the ISL between two VSX core switches is down. What can be determined from the following log output?
When the ISL is down but the keepalive connection remains established, VSX determines that both peers are still operating. The secondary switch then forces its VSX LAG member ports down to prevent split-brain forwarding. Core-2’s log records an out-of-sync/down ISL and successful keepalive, so Core-2 has disabled its VSX LAG interfaces. Aruba AOS-CX 10.15 Virtual Switching Extension Guide
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