Fcid-Allocation - Cisco MDS 9124 - Fabric Switch Reference

Chapter 8 F Commands
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m

fcid-allocation

Use the fcid-allocation command to manually add a FCID to the default area company ID list. Use the
no form of the command to remove a FCID from the default area company ID list.
Syntax Description
area
company-id
company-id
Defaults None.
Command Modes
Configuration mode.
Command History Release
2.0
Usage Guidelines Fibre Channel standards require a unique FCID to be allocated to an N port attached to a Fx port in any
switch. To conserve the number of FCIDs used, Cisco MDS 9000 Family switches use a special
allocation scheme.
Some HBAs do not discover targets that have FCIDs with the same domain and area. Prior to Cisco
MDS SAN-OS Release 2.0, the Cisco MDS SAN-OS software maintained a list of tested company ID
(also know as Organizational Unit Identifier, or OUI) which do not exhibit this behavior. These Host Bus
Adapters (HBAs) were allocated with single FCIDs, and for others a full area was allocated.
The FCID allocation scheme available in Release 1.3 and earlier, allocates a full area to these HBAs.
This allocation isolates them to that area and are listed with their pWWN during a fabric login. The
allocated FCIDs are cached persistently and are still available in Cisco MDS SAN-OS Release 2.0 (see
the "FCID Allocation for HBAs" section on page 38-22).
As of Cisco MDS SAN-OS Release 2.0, to allow further scalability for switches with numerous ports,
the Cisco MDS SAN-OS software is maintaining a list of HBAs exhibiting this behavior. Each HBA is
identified by its company ID used in the pWWN during a fabric log in. Hence a full area is allocated to
the N ports with company IDs that are listed and for the others, a single FCID is allocated. Irrespective
of the kind (whole area or single) of FCID allocated, the FCID entries remain persistent.
Examples
The following example adds a new company ID to the default area company ID list.
switch# config terminal
switch(config)# fcid-allocation area company-id 0x003223
OL-16217-01, Cisco MDS SAN-OS Release 3.x
fcid-allocation area company-id company-id
no fcid-allocation area company-id company-id
Modifies the auto area list of company IDs.
Configures the company IDs.
Modification
This command was introduced.
Cisco MDS 9000 Family Command Reference
fcid-allocation
8-29