Brocade Fabric OS Administrators Guide (Supporting Fabric OS v7.3.0) - Manual (Page 524)

F_Port masterless trunking considerations (Continued) TABLE 91
Category Description
Trunk Master 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".
Upgrade 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 92 describes the PWWN format for F_Port and N_Port trunk ports.
PWWN format for F_Port and N_Port trunk ports TABLE 92
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 Fabrics
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 addressing 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, 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, 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, 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 trunking in Virtual Fabrics
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