Scheduled Service Change: Upgrade of Tier1 network switches in Server Farm
Services on servers that are single attached to Tier 1 will have a 5-10 minute outage at some point during the 3 hour maintenance window. Tier 1 is the main tier and several services will be affected.
There is no workaround for this issue
Upgrade Tier 1 network switch firmware in the Server Farm, the switches will be upgraded one at a time. The Cisco Nexus switches in Rhodes will also be upgraded at this time.