Brocade Communications Systems Fabric OS v7.1.0, Troubleshooting Manual

Page: 81 / 146

Fabric OS Troubleshooting and Diagnostics Guide 65
53-1002751-01
Chapter
7
Virtual Fabrics
In this chapter
•
General Virtual Fabrics troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
•
Fabric identification issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
•
Logical Fabric issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
•
Base switch issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
•
Logical switch issues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
•
Switch configuration blade compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
•
Gathering additional information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
General Virtual Fabrics troubleshooting
All of the following constraints apply when the Virtual Fabrics feature is enabled:
•
The base fabric works only in Brocade native mode, not in an interoperable mode.
•
The base switch does not have any devices. The base fabric can have devices in remote Layer
2 switches; traffic between those devices is supported.
•
A non-base switch in a Virtual Fabric-capable chassis must not be part of a fabric that serves
as a base fabric for some other logical fabric traffic. Although software does not detect or
prevent users from deploying such a configuration, such a configuration is not supported.
•
ICL ports can only be in the base or default switch. If XISL is turned off, you can connect ICLs to
other logical switches.
•
A default switch can be configured as a base switch in the Brocade 5100 and 5300 switches,
but not in a Brocade DCX or DCX-4S. Fabric IDs of default switches cannot be manually
changed.
•
The default switch is able to participate in a logical fabric
usin
g extended ISLs (XISLs). In the
Brocade DCX and DCX-4S, the default switch does not participate in a logical fabric and is a
purely Layer 2 logical switch.
•
EX_ and VEX_Ports are supported in the base switch. EX_Ports cannot be part of any other
switch other than the base switch.
•
EX_ and VEX_Ports cannot connect to a fabric that has a logical switch with the Allow XISL use
mode on. The port is disabled with the reason
Conflict: XISL capability domain
.
•
Fabric OS v6.2.0 and later support external device sharing only through EX_Ports. Internal
device sharing (sharing a device in a logical fabric with other fabrics, without having an
EX_Port) is not supported.
•
A logical fabric cannot have EX_Ports using extended ISLs and cannot serve as a backbone to
any EX_Port traffic. Similarly, the default switch cannot be part of a fabric that serves as a
backbone to any EX_Port traffic.