ESXi enabling Jumboframe to my vSwitch kills iSCSI DaTAsTORE

[alex1002]

I got my iScsi WOrking fine afer a long time, and trying hard. But now the problem i ran into, when enabling Jumbo frames 9000 on the iSCSI Swtich the iSCSi Path dies and my DATAstore dissapears. The MD3000i/Dell 5424 all have jumbo frame enabled.

[a_p_]

How did you enable Jumbo frames? Did you follow the official documentation?

Does your physical switch support Jumbo Frames?

André

[alex1002]

Yes it does support jumbo frames physical switch. I am using the Broadcom iSCSI.

[curlet91]

Also perhaps check that all defined jumbo frame sizes are the same end-to-end, i.e. that they're all set to 9000 and not some other number in between 1500 and 9000.

[alex1002]

Switch is set to 9000 + vSwitch 9000 + SAN 9000.

[mittim12]

Is your VMkernel port set to 9000 too?   Can you utilizing vmkping at 9000 and hit the SAN without any issues? 

[maishsk]

What does vmkping -s 9000 <Storage_IP> from your ESXi server give you?

Same for vmkping -s 8000 <Storage_IP> ??

[alex1002]

both get a reply.

[opbz]

broadcom and iscsi works fine but had some issues with broadcom iscsi and jumbo frames myself...

ensure your server firmware and nic firmware is upto date.

also have a look at this:

http://www.vmadmin.co.uk/vmware/35-esxserver/252-esxihwswiscsijumbo

good luck