General Virtual Fabrics Troubleshooting - Brocade Communications Systems StoreFabric SN6500B Troubleshooting Manual

Virtual Fabrics
In this chapter

General Virtual Fabrics troubleshooting

All of the following constraints apply when the Virtual Fabrics feature is enabled:
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Fabric OS Troubleshooting and Diagnostics Guide
53-1002751-01
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General Virtual Fabrics troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
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Fabric identification issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
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Logical Fabric issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
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Base switch issues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
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Logical switch issues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
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Switch configuration blade compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
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Gathering additional information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
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 using 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
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.
Conflict: XISL capability domain
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