Split-detection mechanisms determine which VSF fragment may continue forwarding after stacking-link partition, preventing two active control domains from advertising identical management identities or gateway addresses. On supported 6200/6300 families, management ports participate in detection; certain 4100i/6100 platforms instead use a dedicated MAD VLAN with front-plane ports. The standby fragment can disable non-VSF ports when the conductor fragment remains active. MC-LAG design does not solve a split-brain event inside a VSF stack, and daisy-chain topology offers less fault tolerance than a ring where supported.
MC-LAG applies to multichassis link aggregation, not detecting a partitioned VSF stack. A daisy chain may create a single break point rather than preventing split brain. VSF split detection is built for isolating dangerous dual-active fragments.
Official HPE references | VSF Profile • VSF Split Detection | Study-guide topic: Managing Wired Networks with HPE Aruba Networking Central
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