The CLI config guide, cookbook, and other things I have found do not explain exactly what is getting translated to what with regards to IVR NAT. I setup a simple scenario, and its all working but I am trying to understand how virtual domains and NAT in general is making it all work.
I setup two switches, MDS1 and MDS2. I put VSAN 10 on MDS1 with a single HOST and VSAN 20 on MDS2 with a single DISK. I made a common transit VSAN between them, VSAN 99 via FCIP. Here is my confused take on what is happening.
HOST can only communicate with DISK if it were in its own VSAN10, which its not. So a FCID is created in VSAN10 of 0x9a6e9f so it can talk to it. This is using domain 9a, which is a virtual domain, not an actual domain so when traffic is directed to it, the MDS re-writes it to 0x736ef8 which is a virtual domain fcid, then the far side mds notices it can get to that pwwn and maps it back to the real fcid in vsan 20 of 0x0900ef. Is this even close? I just want to understand how the "routing" is really working. I understand there is a topology table built, which in this case it is:
MDS1 10,99
MDS2 20,99
(I am using auto topology). Below I have outputs I captured. I had to type these in by hand as there was no way to cut/paste of of the lab I was using. I appreciate any help on this, sorry for the marathon of posts here lately.
MDS1
HOST VSAN10
MDS2
DISK VSAN20
I setup an IVRZoneset so that the HOST and the DISK could see eachother. I am using CFS and IVR NAT as well.
So it works great, the HOST can see the DISK. But I am trying to find out about the translations, here are the tables:
P26-MDS-1# show fcns database
VSAN 10:
---------------------------------------------------------------
FCID TYPE PWWN (VENDOR) FC4-TYPE:FEATURE
---------------------------------------------------------------
0x9a6e9f N 22:6e:00:0c:50:17:26:00 (Seagate) scsi-fcp:target
0xbd0000 N 21:00:00:e0:8b:07:4c:5a (Qlogic) scsi-fcp:init
Total number of entries = 2
VSAN 99:
---------------------------------------------------------------
FCID TYPE PWWN (VENDOR) FC4-TYPE:FEATURE
---------------------------------------------------------------
0x736ef8 N 22:6e:00:0c:50:17:26:00 (Seagate) scsi-fcp:target
0xa85c9f N 21:00:00:e0:8b:07:4c:5a (Qlogic) scsi-fcp:init
Total number of entries = 2
P26-MDS-1# show flogi data
------------------------------------------------------------------
INTERFACE VSAN FCID PORT NAME NODE NAME
------------------------------------------------------------------
fc1/5 10 0xbd0000 21:00:00:e0:8b:07:4c:5a 20:00:00:e0:8b:07:4c:5a
Total number of flogi = 1.
P26-MDS-2# show fcns database
VSAN 20:
---------------------------------------------------------------
FCID TYPE PWWN (VENDOR) FC4-TYPE:FEATURE
---------------------------------------------------------------
0x0900ef N 22:6e:00:0c:50:17:26:00 (Seagate) scsi-fcp:target
0x385c50 N 21:00:00:e0:8b:07:4c:5a (Qlogic) scsi-fcp:init
VSAN 99:
---------------------------------------------------------------
FCID TYPE PWWN (VENDOR) FC4-TYPE:FEATURE
---------------------------------------------------------------
0x736ef8 N 22:6e:00:0c:50:17:26:00 (Seagate) scsi-fcp:target
0xa85c9f N 21:00:00:e0:8b:07:4c:5a (Qlogic) scsi-fcp:init
P26-MDS-2# show flogi data
---------------------------------------------------------------
INTERFACE VSAN FCID PORT NAME NODE NAME
---------------------------------------------------------------
fc1/6 20 0x0900ef 22:6e:00:0c:50:17:26:00 22:6e:00:0c:50:17:26:00
Total number of flogi = 1.
P25-MDS-1# sh ivr virtual-domain
-----------------------------------
VSAN # Domains IVR Virtual Domains
-----------------------------------
10 1 154
99 2 115,168
