Lenovo ThinkSystem DE Series Hardware Installation And Maintenance Manual page 88

If you are using....
RHEL 6.x systems:
RHEL 7.x systems:
SLES 12.x and 15.x systems:
Rebuild the i i n n i i t t r r a a m m f f s s image or the i i n n i i t t r r d d image under /boot directory:
Step 7.
If you are using....
RHEL 6.x and 7.x systems:
SLES 12.x and 15.x systems:
Make sure that the newly created /boot/initrams-* image or /boot/initrd-* image is selected in
Step 8.
the boot configuration file.For example, for grub it is /boot/grub/menu.lst and for grub2 it is /boot/
grub2/menu.cfg.
Step 9. Use the "Create host manually" procedure in the online help to check whether the hosts are
defined. Verify that each host type is either Linux DM-MP (Kernel 3.10 or later) if you enable the
Automatic Load Balancing feature, or Linux DM-MP (Kernel 3.9 or earlier) if you disable the
Automatic Load Balancing feature. If necessary, change the selected host type to the appropriate
setting.
Step 10. Reboot the host.
Configure the switches
You configure the switches according to the vendor's recommendations for iSCSI. These recommendations
might include both configuration directives as well as code updates.
You must ensure the following:
• You have two separate networks for high availability. Make sure that you isolate your iSCSI traffic to
separate network segments.
• You have enabled send and receive hardware flow control end to end.
• You have disabled priority flow control.
• If appropriate, you have enabled jumbo frames.
Notes:
• Port channels/LACP is not supported on the controller's switch ports. Host-side LACP is not
recommended; multipathing provides the same, and in some cases better, benefits.
• Forward Error Correction (FEC) must be turned off for 25G iSCSI network.
Configure networking
You can set up your iSCSI network in many ways, depending on your data storage requirements.
Consult your network administrator for tips on selecting the best configuration for your environment.
To configure an iSCSI network with basic redundancy, connect each host port and one port from each
controller to separate switches, and partition each set of host ports and controller ports on separate network
segments or VLANs.
You must enable send and receive hardware flow control end to end. You must disable priority flow control.
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ThinkSystem DE Series Hardware Installation and Maintenance Guide for 2U Enclosures
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