Fabric OS Administrator’s Guide 445
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F_Port trunking
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configdownload If you issue the configDownload command for a port configuration that is not compatible
with F_Port trunking, and the port is Trunk Area-enabled, then the port will be persistently
disabled. F_Port trunks will never be restored through configDownload.
NOTE: Configurations that are not compatible with F_Port trunking are long distance, port
mirroring, non-CORE_PID, and Fast Write.
domain,index (D,I) Creating a Trunk Area may remove the Index ("I") from the switch to be grouped to the Trunk
Area. All ports in a Trunk Area share the same "I". This means that domain,index (D,I), which
refer to an "I" that might have been removed, will no longer be part of the switch.
NOTE: Ensure to include AD, zoning, and DCC when creating a Trunk Area.
You can remove the port from the Trunk Area to have the "I" back into effect. D,I behaves as
normal, but you may see the effects of grouping ports into a single "I".
Also, D,I continues to work for Trunk Area groups. The "I" can be used in D,I if the "I" was the
"I" for the Trunk Area group.
DCC Policy DCC policy enforcement for the F_Port trunk is based on the Trunk Area; the FDISC requests
to a trunk port are accepted only if the WWN of the attached device is part of the DCC policy
against the TA. The PWWN of the FLOGI sent from the AG will be dynamic for the F_Port
trunk master. Because you do not know ahead of time what PWWN AG will use, the PWWN
of the FLOGI will not go through DCC policy check on an F_Port trunk master. However, the
PWWN of the FDISC will continue to go through DCC policy check.
Default Area Port X is a port that has its Default Area the same as its Trunk Area. The only time you can
remove port X from the trunk group is if the entire trunk group has the Trunk Area disabled.
Downgrade You can have trunking on, but you must disable the trunk ports before performing a
firmware downgrade.
Note: Removing a Trunk Area on ports running traffic is disruptive because you must
disable the port to disable the Trunk Area on the port. Use caution before assigning a Trunk
Area if you need to downgrade to a firmware version earlier than Fabric OS v6.2.0.
Fastwrite When you assign a Trunk Area to a trunk group, the trunk group cannot have Fastwrite
enabled on those ports; if a port is Fastwrite-enabled, the port cannot be assigned a Trunk
Area.
FICON FICON is not supported on F_Port trunk ports. However, FICON can still run on ports that are
not F_Port trunked within the same switch.
HA Sync If you plug in a standby CP with a firmware version earlier than Fabric OS v6.2.0 and a Trunk
Area is present on the switch, the CP blades will become out of sync.
Long Distance Long distance is not allowed on F_Port trunks, which means a Trunk Area is not allowed on
long-distance ports; you cannot enable long distance on ports that have a Trunk Area
assigned to them.
Management Server Registered Node ID (RNID), Link Incident Record Registration (LIRR), and Query Security
Attribute (QSA) ELSs are not supported on F_Port trunks.
NPIV Supported on F_Port master trunk.
PID format F_Port trunking is only supported in the CORE PID format.
Port mirroring Port mirroring is not supported on Trunk Area ports or on the PID of an F_Port trunk port.
TABLE 76 F_Port masterless considerations (Continued)
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