Changing interop mode 1 back to default

[dynamoxxx]

Hello,

i need to connect MDS 9513 to McData 6140 for migration purposes, plan is to get rid of McData in the near future.  McData is running in open mode 1.0 so i am planning to set VSAN mode to 1. After all systems get migrated to Cisco i would like to convert interop mode back to default, what will happen ? Will all systems get new FCID ?  What else should i think about ?

Thanks

[Michael Brown]

While in interop mode 1, the domain IDs must fall with in a defined range.  In order for you to change a VSAN to interop mode 1, you have to set the domain ID to a value of decimal 97 to 127 and do an fcdomain restart.  This would be distuprtive to any devices currently logged into that VSAN as their FCID would change.  The message below indicated that VSAN 1 currentluy does not have a domain ID that is in the interop 1 range.

MDS2-98(config-vsan-db)# vsan 1 interop 1
vsan 1:interoperability mode 1 allowed domain list [97-127] does not include all assigned and configured domains or conflicts with existing allowed domain lists

The command to see the current domain ID is

show fcdomain vsan 1

The config command to set it to 124 is

fcdomain domain 124 static van 1

Then to restart the VSAN to make the new domain ID effective

fcdomain restart vsan 1

If you are using a newly created VSAN, I then I believe that when you create the VSAN in interop mode 1, it will automatically use one of the needed domain IDs.  When you change it back to default, the domain ID should remain the same.

In interop 1, I believe that you can only zone by PWWN, so migrating the VSAN back to default should not be an issue with zoning.

Hope this helps,

Mike

[dynamoxxx]

Thank you for your reply Mike. So what you are saying is that if right now domain id for that VSAN is 98, when i change interop mode to "default",  domain id will remain the same thus fcid in that VSAN will not change and will not impact my HPUX/AIX hosts (that rely on fcid for hardware path) ? Do i need to restart fcdoman when going from interop mode 1 to default ?

Thank  you

[leosidil1]

How exactly can I change interop mode back to default?

Should I run

switch(config-vsan-db)#vsan 1 interop 0 ?

If I have a few vsans, should I run above command for each one?

Thanks,

Leo

[leosidil1]

I found an answer here: Cisco MDS 9000 Family Switch-to-Switch Interoperability Configuration Guide

https://www.cisco.com/en/US/docs/storage/san_switches/mds9000/interoperability/guide/ICG_lim.html#wp1040121

Changing Interop Modes to Default Modes Pages 2-7 and 6-4:

Changing Interop Modes 1, 2, and 3

Step 1 Set the domain IDs as static.
Step 2 Back up the running configuration.
Step 3 Suspend the VSAN, which will disrupt traffic.
Step 4 Change the interop mode in the VSAN to the default mode.

Step 5 Activate the VSAN with the no vsan x suspend command, which still stop the traffic disruption. For more information about this command, see the Cisco MDS 9000 Family Command Reference.