I have just turned on IVR NAT and can see the "virtual" entries in the fcns database for each VSAN. I was surprised to see that it is not a one to one mapping between a "real" domain and a "virtual" domain. I was expecting to see the Domain octet of the FCID translated to a new number that was unique to the VSAN/domain pair the device resided in and the rest of the FCID to remain the same. However, what I see is a unique domain octet for each *VSAN* I am routing to and the rest of the FCID is translated to something that I cannot trace back. Does anybody know how the translation is done? Is there any way of interrogating the mappings held by the switch? fcns output below:
0x070006 N 50:06:04:8c:52:a6:5d:98 (EMC) scsi-fcp:both 253
0x070007 N 50:06:04:84:52:a6:5d:97 (EMC) scsi-fcp:both 253
0x24e164 N 21:01:00:e0:8b:b2:5e:d9 (Qlogic) ipfc scsi-fcp:init
0x24e465 N 21:01:00:e0:8b:b2:6f:dc (Qlogic) ipfc scsi-fcp:init
07 is the local DID on the local VSAN.
24 is one of the IVR'd VSANs, but the first virtual entry seen here is on DID 3 and the second is on DID 5 on the "remote" VSAN. How come the Virtual DIDs aren't different?
Lastly, are the FCID mappings persistent? Could a reload cause a re-allocation of the virtual FCIDs meaning I going to come unstuck if I am IVR-ing using IVR NAT with HPUX/AIX?