Brocade Fabric OS Administrators Guide (Supporting Fabric OS v7.3.0) - Manual (Page 444)

The purpose of this feature is to make it possible for all devices; including base device and NPIV
devices on a NPIV port to logout and login without disrupting the remaining logged on devices. By
default, the base device logout option is disabled in all the ports.
1. Enable NPIV on the required ports.
Ports that do not have NPIV capability cannot have the base device logout option enabled.
2. Disable the ports for which you want to enable base device logout, as this is a disruptive operation.
3. Enable base device logout using the portCfgFLOGILogout command.
The following example enables base device logout on all the ports in the logical
switch.
portcfgflogilogout --enable –all
The following example enables base device logout on only specific ports in the
logical switch.
portcfgflogilogout --disable 7/1-5
Use cases and dependencies
The following use cases and dependencies apply to the base device logout feature:
• When the base device logs out, the remaining NPIV devices on that port remain logged in.
• The base device can log in again later on the same port as the base device with a FLOGI. However,
all the existing NPIV devices will be dropped and only the new FLOGI information will be retained.
• The base device can log in again later on the same port with the same PWWN, but as an NPIV
device. At this point, it is no longer referred to as the base device, and it becomes a logged-in NPIV
device.
• NPIV devices can log in or log out on the same port as long as at least one device (either a base
device or an NPIV device) remains logged in on the port.
• The logged-out base device can log in on a different port as either the base device (with a FLOGI)
or as an NPIV device (with an FDISC). If the base device logs in on a different port as a base
device, it no longer is the base device for the remaining NPIV devices on the original port.
• The logged-out base device can log in to a port on a different switch as either the base device (with
a FLOGI) or as an NPIV device (with an FDISC). If the base device logs in to a port on a different
switch as a base device, it is no longer the base device for the remaining NPIV devices on the
original port.
• When all devices (base device and NPIV devices) have logged out of a port, a base device must be
the next device to log in on that port with a FLOGI.
• The base device logout feature is backward compatible when you do not enable base device logout
for the port.
• Default switch behavior is the legacy functionality (base device logout is disabled).
• All checks for duplicate WWN remain valid.
• The base device logout feature can coexist with other switches that do not have base device logout
enabled, even if they are in the same fabric.
• Any port-related Fabric OS features that depend on the base device cannot work when the base
device logs out. One example of this is device probing.
• Trunking is not affected by base device logout because only Brocade switches utilize F_Port
trunking, and the related Access Gateway N_Ports do not keep NPIV devices logged in when the
base device logs out.
• QoS, FEC, and credit recovery features are not affected by base device logout.
• Port swap is not affected by the base device logout feature.
• Connectivity to NPIV devices is not affected when the base device logs out.
Use cases and dependencies
444 Fabric OS Administrators Guide
53-1003130-01