HP 8/8 Fabric OS Administrator's Guide v6.4.0 (53-1001763-01, June 2010) - Page 476

19 F_Port masterless trunking TABLE 89 Category F_Port masterless trunking considerations (Continued) Description D.I. Zoning (D,I) AD (D,I) DCC and (PWWN,I) DCC 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 Default Area Downgrade Note: "I" refers to Index and D,I refers to Domain,Index. 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. 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. You can have trunking on, but you must disable the trunk ports before performing a firmware downgrade. Fastwrite FC4-32 blade FC4-48 blade FICON HA Sync ICL Port Long Distance 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. 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. For the Brocade 48000: If an FC4-32 blade has the Trunk Area enabled on ports 16 - 31 and the blade is swapped with an FC4-48 or FC8-48 blade, the Trunk Area ports will be persistently disabled. You can run the portTrunkArea command to assign a Trunk Area on those ports. On the FC4-48 blade, F_Port masterless trunking is supported only on ports 0 - 15. 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. 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. F_Port trunks are not allowed on Inter-Chassis Link (ICL) Ports. The portTrunkArea command does not allow it. 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. 436 Fabric OS Administrator's Guide 53-1001763-01