Controls/EDCA-PERF-007.json
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{
"id": "EDCA-PERF-007", "title": "Receive Side Scaling (RSS) enabled", "description": "Receive Side Scaling (RSS) is a network driver feature that distributes inbound network packet processing across multiple CPU cores using a hash of packet header fields, preventing a single core from becoming a bottleneck on high-throughput network interfaces. Receive Side Scaling (RSS) MUST be enabled on active network adapters. RSS distributes network receive processing across multiple processor cores, improving throughput for Exchange workloads.", "verify": true, "subject": "Server", "category": "Performance", "severity": "Medium", "severityWeight": 6, "frameworks": [ "Best Practice" ], "references": [ { "name": "CSS NIC/RSS checks", "url": "https://github.com/microsoft/CSS-Exchange/blob/main/Diagnostics/HealthChecker/HealthChecker.ps1" } ], "remediation": { "automatable": true, "description": "Enable RSS on adapters where supported.", "scriptTemplate": "Get-NetAdapterRss | Where-Object { -not $_.Enabled } | ForEach-Object { Enable-NetAdapterRss -Name $_.Name -Confirm:$false }" }, "considerations": "Enabling or reconfiguring RSS settings may require a network adapter driver update and a server reboot. Changes to RSS may briefly interrupt network connectivity. Verify that the network adapter firmware supports the target RSS configuration.", "roles": [ "Mailbox", "Edge" ] } |