Lenovo DE120S, Hardware Installation And Maintenance Manual

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-s switch sets the
packet size
bit. The -d switch sets the DF (Don't Fragment) bit on the IPv4
packet. These options allow jumbo frames of 9,000 bytes to be successfully transmitted between
the iSCSI initiator and the target.
vmkping -s 8972 -d
<iSCSI_target_IP_address>
In this example, the iSCSI target IP address is
192.0.2.8
.
vmkping -s 8972 -d 192.0.2.8
Pinging 192.0.2.8 with 8972 bytes of data:
Reply from 192.0.2.8: bytes=8972 time=2ms TTL=64
Reply from 192.0.2.8: bytes=8972 time=2ms TTL=64
Reply from 192.0.2.8: bytes=8972 time=2ms TTL=64
Reply from 192.0.2.8: bytes=8972 time=2ms TTL=64
Ping statistics for 192.0.2.8:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 2ms, Maximum = 2ms, Average = 2ms
Step 2. Issue a vvm mkkp piin ng g command from each host’s initiator address (the IP address of the host Ethernet
port used for iSCSI) to each controller iSCSI port. Perform this action from each host server in the
configuration, changing the IP addresses as necessary.
Note: If the command fails with the message
sendto() failed (Message too long)
, verify the MTU
size (jumbo frame support) for the Ethernet interfaces on the host server, storage controller, and
switch ports.
Step 3. Return to the iSCSI Configuration procedure to finish target discovery.
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ThinkSystem DE Series Hardware Installation and Maintenance Guide for 2U Enclosures