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14 Configuring iSCSI Connectivity with VMware vSphere 6 and Dell PS Series Storage | TR1075
6. Repeat these steps for each iSCSI VMkernel, mapping a different network adapter to each
VMkernel port. In the examples shown, VMkernel iSCSI-1 is mapped one-to-one with vmnic2, and
VMkernel iSCSI-2 is mapped one-to-one with vmnic3.
6.1.4 Step 4: Configure Jumbo Frames
In order for Jumbo Frames to work, it must be enabled end-to-end, on both the physical and virtual
network infrastructure, or the frame size will fall back to standard frames. PS Series arrays have Jumbo
Frames enabled by default. Verify with your network administrator that the network fabric has Jumbo
Frames enabled.
For Jumbo Frames to be enabled for iSCSI traffic on an ESXi host, it must be enabled on both the vSwitch
used for iSCSI and all VMkernel ports that will carry iSCSI traffic.
1. Select the host, click the Manage tab, and then click the Networking button.
2. Select the previously created vSwitch from the Switch list (in this example vSwitch1), then click the
Edit Setting icon above it.
3. In Edit Setting under Properties, change the MTU from the default of 1500 to 9000, and click OK.