SafeGuard Solutions Deploying Brocade AP-7600B and PB-48K ...

If, however, using frame redirect, you are able to use both DPCs, then
ITLs are calculated separately for each DPC. Hence, if the
configuration in the first example is changed, as follows:
◆ 500 (of the 1000 LUNs in the first example) are exposed to the
hosts through DPC 0, and the remaining 500 are exposed through
DPC 1
◆ All 500 of the hosts in DPC 0 support reservations; 200 of the
hosts in DPC 1 support reservations
Then the total number of ITLs is as follows:
ITLs = {ITLs for DPC 0} + {ITLs for DPC 1}
= {[(2 host initiators) x (500 LUNs)] + [(1000 host ITLs for which
LUNs support reservations) x (4 RA initiator ports)]} + {[(2
host initiators) x (500 LUNs)] + [(400 host ITLs for which
LUNs support reservations) x (4 RA initiator ports)]}
= {1000 + 4000} + {1000 + 1600}
= 7600
Note: Beginning with Unisys SafeGuard Solutions 6.1, the system displays
warnings whenever your system approaches or exceeds scalability limits for
ITLs, virtual entities, and total LUNs.
Unisys SafeGuard Solutions deployment procedure
This section outlines the procedure for deploying Unisys SafeGuard
Solutions on the Brocade AP-7600B or PB-48K-AP4-18, as well as tests
that can be used to verify that the installation has been completed
successfully. It is assumed that the Brocade devices, running the
specified version of Fabric OS, have been installed prior to beginning
this procedure.
With multiple SAS-enabled Brocade switches, and with hosts running
multipathing software, this process can be done nondisruptively by
migrating one switch at a time.
The procedure for deploying Unisys SafeGuard Solutions in a
Brocade AP-7600B or PB-48K-AP4-18 environment is presented in
this section as a single, consecutively numbered procedure, with the
following primary tasks:
18 Unisys SafeGuard Solutions Deploying Brocade AP-7600B and PB-48K-AP4-18 Devices Technical Notes