32 Brocade Adapters Administrator’s Guide
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Boot over SAN (HBA only)
4
Enabling and disabling rate limiting on the adapter side using the BCU
Enter the following command to enable or disable rate limiting on the adapter side.
NOTE
You must first enter the bcu port --disable <port_id> command, followed by the
bcu port --enable <port_id> command, before the bcu ratelim --enable or
bcu ratelim --disable commands take effect.
bcu ratelim - -enable <port_id> [-s <default_speed>]
bcu ratelim - -disable <port_id>
bcu ratelim - -query <port_id>
bcu ratelim - -defspeed <port_id> [<1|2|4>]
Refer to “ratelim (HBA only)” on page 191 for details about this command.
Boot over SAN (HBA only)NOTE
The Boot over SAN feature is not supported on the converged network adapter (CNA).
The boot over SAN feature allows you to target remote boot devices (LUNs on SAN storage arrays)
from which to boot the host system. When the host’s operating system and adapter driver are
installed on the remote device, the adapter BIOS and user-configurable boot instructions stored in
adapter flash memory allow the host to boot from the device.
NOTE
Various operating systems require you to follow specific guidelines to enable servers to boot from a
SAN. Understanding these requirements is key to a successful deployment of a boot over SAN
environment.
Boot LUNs are identified to adapter ports using the BIOS Configuration Utility and BCU commands.
These utilities also allow you to enable or disable BIOS for booting the host system over SAN, set
boot options, and set the port speed. Refer to the Brocade Adapters Installation and Reference
Manual for instructions.
After you have configured boot devices using the BIOS Configuration Utility, you can enable or
disable BIOS for boot over SAN, set boot options, and set port speed using the HCM GUI. All
configuration is stored in flash memory.