Home > Storage > PowerMax and VMAX > Storage Admin > iSCSI Implementation Guide for Dell EMC Storage Arrays Running PowerMaxOS > Verify network connectivity to POWERMAX IP interfaces
Before installing MPIO or configuring the iSCSI Services on the host, it is important to verify network connectivity to the POWERMAX IP interface. This can be done simply by pinging the IP addresses of the POWERMAX IP interfaces.
PS C:\> ping 192.168.83.30
Pinging 192.168.83.30 with 32 bytes of data:
Reply from 192.168.83.30: bytes=32 time<1ms TTL=64
Reply from 192.168.83.30: bytes=32 time<1ms TTL=64
PS C:\> ping 192.168.82.30
Pinging 192.168.82.30 with 32 bytes of data:
Reply from 192.168.82.30: bytes=32 time<1ms TTL=64
Reply from 192.168.82.30: bytes=32 time<1ms TTL=64
Verify that the jumbo frames can be transmitted using a ping on Windows. The 28 Bytes of overhead must be subtracted from the 9000 MTU value, therefore the size of the test packet needs to be 8972 Bytes (Size of packet = 9000 Byte MTU 28 Bytes overhead = 8972).
PS C:\> ping -f -l 8972 192.168.82.30
Pinging 192.168.82.30 with 8972 bytes of data:
Reply from 192.168.82.30 : bytes=8972 time=1ms TTL=255
Reply from 192.168.82.30: bytes=8972 time<1ms TTL=255
PS C:\> ping -f -l 8972 192.168.83.30
Pinging 192.168.82.30 with 8972 bytes of data:
Reply from 192.168.83.30: bytes=8972 time=1ms TTL=255
Reply from 192.168.83.30: bytes=8972 time<1ms TTL=255
If for some reason the jumbo packet fragments in the above ping command as shown below, recheck to ensure that jumbo packets are enabled across the entire iSCSI network including the POWERMAX IP interfaces, all switch ports (all hops), and host NICs.
PS C:\> ping -f -l 8972 192.169.82.30
Pinging 192.168.82.30 with 8972 bytes of data:
Packet needs to be fragmented but DF set.
Packet needs to be fragmented but DF set.
At this point, the network connectivity to the Management operating system partition on the Hyper-V host is complete. The virtual switches have been created and the vNICs have successfully assumed the IP configuration of the physical NICs.