Using more than one NIC on the
same subnet
Using Ethernet Jumbo frames
(larger than 1500 bytes)
Check that you can ping all iSCSI host ports from the
attached host server. Multiple NICs configured on the
same subnet cannot complete a ping command
because the default NIC originating the ping command
may not have a path to the target IP address being
pinged.
On Windows-based hosts, use the -S parameter to
specify the source and target IP addresses on the RAID
controller:
ping 192.168.130.101 –S 192.168.130.102
On Linux-based hosts, use the -I parameter to specify
the target IP address from the
ping –I eth0 192.168.130.101
NOTES:
You should be able to successfully ping
-
multiple NICs on different subnets. However, if
each NIC is on the same subnet, you must map
each iSCSI port manually via the host server
iSCSI initiator.
Make sure Enable ICMP PING responses is
-
selected in the MD Storage Manager Configure
iSCSI Host Ports window
Check your firewall settings to make sure that
-
ICMP ping packets are not blocked internally
If you are using Ethernet frames with a maximum
transmission unit (MTU) of more than 1500 bytes, they
are considered Jumbo frames. The MD-series storage
array supports MTU sizes of up to 9000 bytes.
However, you should tune your maximum MTU size
based on the application and drivers used in your
configuration. Smaller MTU sizes may yield better
overall data throughput.
1. Verify that Jumbo frames are set to Enabled
for all network components (switches, NICs
and the storage array).
2. Ensure that the same MTU size is set on all
components. If unequal sizes are set on host
and target, the smallest setting will be used.
The switch may fragment any frame that is
larger than its set MTU size.
3. After setting the proper sizes, verify network
interface:
eth0
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