Service Manual

Firmware upgrade and downgrade considerations for Peer Zoning
When a switch containing Peer Zones is upgraded to Fabric OS 7.4.0, Peer Zoning connectivity rules
are enforced on the devices attached to the upgraded switch. If the device is a member of a Peer Zone,
the upgrade can cause disruption.
When a switch containing Peer Zones is downgraded from Fabric OS 7.4.0 to an earlier version, the
Peer Zones are treated as regular zones and the zones follow the regular zoning connectivity rules.
All devices in the Peer Zone must be attached to switches running Fabric OS 7.4.0 or later, for the Peer
Zoning connectivity rules to be applied. If any device that is part of the Peer Zone is attached to a switch
running an earlier version of Fabric OS, the Peer Zone will be treated as a regular zone.
After downgrading to an earlier version of Fabric OS, Peer Zoning connectivity rules remain on the
switch until a port of the Peer Zone device is toggled or a new zoning configuration is committed. In
such a case, the regular zoning rules apply to the Peer Zones.
Firmware upgrade and downgrade considerations for Peer Zoning
Fabric OS Upgrade Guide 15
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