Jumbo Frames

In some iSCSI environments it is required to enable jumbo frames to adhere to the network configuration between the host and the FlashArray. Enabling jumbo frames is a cross-environment change so careful coordination is required to ensure proper configuration. It is important to work with your networking team and Everpure representatives when enabling jumbo frames. Please note that this is not a requirement for iSCSI use on the Everpure FlashArray—in general, Everpure recommends leaving MTU at the default setting.

1. Configure jumbo frames on the FlashArray iSCSI ports.

   Configure jumbo frames on the physical network switch/infrastructure for each port using the relevant switch CLI or GUI.

2. Configure jumbo frames on the physical network switch/infrastructure for each port using the relevant switch CLI or GUI.
   1. Browse to a host in the vSphere Web Client navigator.
   2. Click the Configure tab and select Networking > Virtual Switches.
   3. Select the switch from the vSwitch list.
   4. Click the name of the VMkernel network adapter.
   5. Click the pencil icon to edit.
   6. Click NIC settings and set the MTU to your desired value.
   7. Click OK.
   8. Click the pencil icon to edit on the top to edit the vSwitch itself.
   9. Set the MTU to your desired value.
   10. Click OK.

   Once jumbo frames are configured, verify end-to-end jumbo frame compatibility. To verify, try to ping an address on the storage network with vmkping.

   
   vmkping -d -s 8972 <ip address of Pure Storage iSCSI port>

   If the ping operations does not return successfully, then jumbo frames is not properly configured in ESXi, the networking devices, and/or the FlashArray port.