NC553m Jumbo Frame Disable or Enable

[mwalkertx320]

I've got a BL460c G7 with a NC553m iSCSI HBA that I need to disable Jumo Frames (set MTU to 1500). I can see the Max MTU of 8473 in the Emulex Onecommand configuration utility, but can figure out where to change this. This is a NC553m port in iSCSI personality mode. I'm having to disable Jumbo Frames due to an issue with Jumbo Frames in my EMC VNXe SAN. EMC Support Engineers have recommended disabling Jumbo Frames.

[Jags_21]

Hi,

Below are the steps from OS perspective where you can change the MTU size.

for Windows:

1. Right-click the NIC for which you want to enable jumbo frames and select Properties.
2. Under the Networking tab, click the Configure button for the network adapter.
3. Select the Advanced tab.
4. Select Jumbo Frame and change the value to the desired value.
5. Click OK to all dialogs.

for VMware:

refer kb article: http://kb.vmware.com/kb/1007654

for Linux:

1. Edit /etc/sysconfig/network-scripts/ifcfg-eth0, enter
   # vi /etc/sysconfig/network-scripts/ifcfg-eth0
2. Add MTU, settings:
   MTU="9000" or any desired value
3. Save and close the file. Restart networking:
   # service network restart

Thanks,

Jagadish

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