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Blades that use iSCSI boot must contain theCisco UCS M51KR-B BroadcomBCM57711 network
adapter. For information on installing or replacing an adapter card, see the Cisco UCS B250
◦
Extended Memory Blade Server Installation and Service Note. The service note is accessible from
the Cisco UCS B-Series Servers Documentation Roadmap at http://www.cisco.com/go/
unifiedcomputing/b-series-doc.
◦ Set the MAC addresses on the iSCSI device.
◦ If you are using the DHCP Vendor ID (Option 43), the MAC address of an iSCSI device needs to
be configured in /etc/dhcpd.conf.
◦ HBA mode (also known as TCP offload) and the boot to target setting are supported. However,
only Windows OS supports HBA mode during installation.
◦ Before installing the OS, disable the boot to target setting in the iSCSI adapter policy, then after
installing the OS, reenable the boot to target setting.
Each time you change an adapter policy setting, the adapter reboots to apply the new
setting.
Note
◦
When installing the OS on the iSCSI target, the iSCSI target must be ordered before the device
where the OS image resides. For example, if you are installing the OS on the iSCSI target from a
CD, the boot order should be the iSCSI target and then the CD.
◦ After the server has been iSCSI booted, do not modify the Initiator Name, Target name, LUN,
iSCSI device IP, or Netmask/gateway using the Broadcom tool.
◦ Do not interrupt the POST (power on self-test) process or the Cisco UCS M51KR-B Broadcom
BCM57711 network adapter will fail to initialize.
• For Cisco UCS M81KR Virtual Interface Card and Cisco UCS M82-8P Virtual Interface Card:
• Do not set MAC addresses on the iSCSI device.
•
HBA mode and the boot to target setting are not supported.
•
When installing the OS on the iSCSI target, the iSCSI target must be ordered after the device where
the OS image resides. For example, if you are installing the OS on the iSCSI target from a CD,
the boot order should be the CD and then the iSCSI target.
• If you are using the DHCP Vendor ID (Option 43), the MAC address of the overlay vNIC needs
to be configured in /etc/dhcpd.conf.
• After the server has been iSCSI booted, do not modify the IP details of the overlay vNIC.
• The VMware ESX/ESXi operating system does not support storing a core dump file to an iSCSI boot
target LUN. Dump files must be written to a local disk.
Cisco UCS Manager GUI Configuration Guide, Release 2.0
OL-25712-04 445
iSCSI Boot