→ Applies to: SynetoOS 6.0.3 and above

IMPORTANT
– Subnet Separation: Isolate iSCSI traffic on dedicated, non-routable VLANs. This prevents congestion from competing workloads and reduces the attack surface for unauthorized access to storage traffic.
– Jumbo Frames: Enable Jumbo Frames (MTU 9000) consistently across all switches, NICs, and iSCSI targets. Mismatched MTU values across any hop in the path will cause packet fragmentation and degrade throughput — verify end-to-end before going to production.

Step 1. Login to SynetoOS GUI

Step 2. From the Storage menu, click on iSCSI

Step 3. Add iSCSI Target ("How to Add a New iSCSI Target in SynetoOS 6")

Perform this step for each iSCSI Target portal.

Step 4. Click on Rescan

Step 5. Select the target, then click on Multipath settings

Step 6. Fill in the Multipath settings field, then click on Save

• Policy: The load-balancing and traffic distribution method across the available paths.
• Path checker: The mechanism used to monitor the status and health of paths.
• Polling interval: The frequency (in seconds) at which path health checks are performed.
• No-path retry: Number of polling cycles to wait before declaring that no viable path exists and escalating the fault.
• Failback: Controls how the system behaves when a failed path comes back online.
• Failback delay: Number of seconds to wait before switching back to a recovered path.
• Min I/O per path: The minimum number of I/O requests or data blocks routed down a single path before switching to the next available path when distributing workload.