IVR virtual domain in fcdomain domain-list interop mode 2 and 3

Today I was configuring an IVR scenerio that was pretty straight forward. Here is the summary:

I establish IVR between MDS1 and MDS2
MDS1 uses VSAN50 interop 2 attached to a Brocade PID0 switch on fc1/6
MDS2 uses VSAN50 interop 1 attached to a McData switch on fc1/6

VSAN 51 is used as a transit VSAN with proper vsan-topology setup:

MDS2# show ivr vsan-topology

AFID SWITCH WWN Active Cfg. VSANS Switch-Name
-------------------------------------------------------------------------
1 20:00:00:0d:ec:0e:b2:40 yes yes 50
2 20:00:00:0d:ec:0e:b2:40 yes yes 51
2 20:00:00:0d:ec:19:c9:00 * yes yes 51
3 20:00:00:0d:ec:19:c9:00 * yes yes 50

Total: 4 entries in active and configured IVR VSAN-Topology

On MDS1 I am seeing the virtual domain in the fcdomain domain-list. This normally would not happen unless you explicitly configure the ivr virtual-fcdomain-add command.  However this is added by SAN-OS in interop modes 2 and 3. This is known as RDI Mode.

Observe the following:

MDS1# show ivr virtual-fcdomain-add-status
IVR virtual domains are added to fcdomain list in VSANS: 50
Force Option : Off

I did not configure ivr virtual-fcdomain-add vsan 50, yet it’s behaving as if I did.  It is automatically added by SAN-OS.

MDS1# show fcdomain domain-list vsan 50

Number of domains: 3
Domain ID WWN
--------- -----------------------
0x62(98) 20:32:00:0d:ec:0e:b2:41 [Local]
0x63(99) 10:00:00:60:69:20:28:97 [Principal]
0x6a(106) 10:00:08:00:88:30:01:8a

You can clearly see from the above output the virtual-domain of 0x6a being added to the fcdomain domain-list on MDS1.

MDS1# show ivr virtual-dom
VSAN # Domains IVR Virtual Domains
---- --------- ----------------------------------------------
50 1 106
51 2 99,106
---- --------- ----------------------------------------------

Now take a look at MDS2, which is behaving in a regular fashion since its in interop mode 1:

MDS2# show ivr virtual-fcdomain-add-status
IVR virtual domains are not added to fcdomain list
Force Option : Off
MDS2# show fcdomain domain-list vsan 50

Number of domains: 2
Domain ID WWN
--------- -----------------------
0x64(100) 20:32:00:0d:ec:19:c9:01 [Local]
0x6a(106) 10:00:08:00:88:30:01:8a [Principal]
MDS2# show ivr virtual-dom
VSAN # Domains IVR Virtual Domains
---- --------- ----------------------------------------------
50 1 99
51 2 99,106
---- --------- ----------------------------------------------

Thanks to Cisco TAC for pointing this behavior out to me. It’s documented in the Cisco MDS9000 Interoperability Configuration Guide