Dell Brocade 6520 Administrator's Guide Supporting Fabric OS 7.1.0 - Page 548
F_Port trunking in Virtual Fabrics, TABLE 81
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22 F_Port trunking TABLE 80 Category F_Port masterless trunking considerations (Continued) Description Trunk Master Upgrade No more than one trunk master is allowed in a trunk group. The second trunk master will be persistently disabled with the reason "Area has been acquired". There are no limitations on upgrading to Fabric OS v7.0.0 and later if the F_Port is present on the switch. Upgrading is not disruptive. Table 81 describes the PWWN format for F_Port and N_Port trunk ports. TABLE 81 PWWN format for F_Port and N_Port trunk ports NAA = 2 2f:xx:nn:nn:nn:nn:nn:nn (1) Port WWNs for: switch's Fx_Ports. The valid range of xx is [0-FF], for a maximum of 256. NAA = 2 25:xx:nn:nn:nn:nn:nn:nn (1) Port WWNs for: switch's FX_Ports The valid range of xx is [0-FF], for a maximum of 256. F_Port trunking in Virtual Fabrics F_Port trunking functionality performs the same in Virtual Fabrics as it does in non-Virtual Fabric platforms except for the Brocade DCX and DCX 8510-8. Fabric OS uses a 10-bit addressing model, which is the default mode for all dynamically created logical switches in the DCX platform. In the DCX and DCX 8510 platforms, F_Port trunk ports dynamically receive an 8-bit area address that remains persistent. After F_Port trunking configurations are removed from a port in a logical switch, that port returns to the default 10-bit area address model, which supports up to 1024 F_Ports in a logical switch. NOTE Because the DCX and DCX 8510-8 platforms have a maximum of 576 ports, out of the 1024 10-bit address range, addresses 448-1023 are reserved for the 10-bit address space. Addresses 0-447 are reserved for assigning to NPIV/Loop ports to support 112 (448/4) NPIV/Loop ports in a logical switch with 256 devices each. The following are the F_Port trunking considerations for Virtual Fabrics: • If a port is enabled for F_Port trunking, then you must disable the configuration before you can move a port from the logical switch. • If the user-bound area for a port is configured by means of the portAddress command, then the port cannot be configured as an F_Port trunk port. You must explicitly remove the user-bound area before enabling F_Port trunking. • If you swap a port by using the portSwap command, then you must undo the port swap before enabling F_Port trunking. • The Port WWN format in a Virtual Fabric is 2z:zz:xx:xx:xx:xx:xx:xx. The z:zz is the logical port number, for example, the logical port 450 will be 1:c2. The xx:xx:xx:xx:xx:xx is based on the logical fabric WWN. For example, if the logical fabric WWN is 10:00:00:05:1e:39:fa:f3, and logical port number is 450, then the Port WWN of the F_Port trunk will be 21:c2: 00:05:1e:39:fa:f3. • F_Port trunks are not allowed on the base switch, because you cannot have F_Ports on the base switch. 548 Fabric OS Administrator's Guide 53-1002745-02
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