I have a question about my current setup. I have an EMC ISCSI NAS device that I have connected to two 3560 GB switches, I have enabled jumboframes on the two switches. I also use the NAS function of the device and have an interface on the EMC configured for another network (VLAN8). I am gaining access to that network (VLAN8) via one of the fibre ports on the 3560 which maps back to a fibre port on my 4507. I have an MTU size of 9000 configured on all three interfaces (NAS interface, 3560 Fibre Int, 4507 Fibre int) my question is if I'll have issues with clients accessing the NAS since all my clients are obviously aren't using jumbo frames.
> my question is if I'll have issues with clients accessing the NAS
> since all my clients are obviously aren't using jumbo frames.
No. The client-to-NAS connection will send regular frame-size packets and makes no difference if jumbo frame is enabled in the switches. The problem you may encounter if you are sending jumbo frames in the client-to-NAS connection and the switches wouldn't support it. In the case, you would encounter packet fragmentation.