Intel XL710-Q2 User Manual page 73

One of the features is not supported by the switch.
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The switch is not advertising the feature.
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The switch or host has disabled the feature (this would be an advanced setting for the
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host).
Disable/enable DCB
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Troubleshooting information
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Hyper-V (DCB and VMQ)
NOTE: Configuring a device in the VMQ + DCB mode reduces the number of VMQs available for
guest OSes.
DCB for Linux
DCB is supported on RHEL6 or later or SLES11 SP1 or later. See your operating system documentation for
specifics.
iSCSI Over DCB
Intel® Ethernet adapters support iSCSI software initiators that are native to the underlying operating system.
Data Center Bridging is most often configured at the switch. If the switch is not DCB capable, the DCB
handshake will fail but the iSCSI connection will not be lost.
NOTE: DCB does not install in a VM. iSCSI over DCB is only supported in the base OS. An iscsi ini-
tiator running in a VM will not benefit from DCB ethernet enhancements.
Microsoft Windows Configuration
iSCSI installation includes the installation of the iSCSI DCB Agent (iscsidcb.exe) user mode service. The
Microsoft iSCSI Software Initiator enables the connection of a Windows host to an external iSCSI storage
array using an Intel Ethernet adapter. Please consult your operating system documentation for configuration
details.
Enable DCB on the adapter by the following:
1. From Windows Device Manager, expand Networking Adapters and highlight the appropriate
adapter (such as Intel® Ethernet Server Adapter X520). Right click on the Intel adapter and select
Properties.
2. In the Property Page, select the Data Center Tab.
The Data Center Tab provides feedback as to the DCB state, operational or non- operational, as well as
providing additional details should it be non-operational.
Using iSCSI over DCB with ANS Teaming
The Intel® iSCSI Agent is responsible for maintaining all packet filters for the purpose of priority tagging iSCSI
traffic flowing over DCB-enabled adapters. The iSCSI Agent will create and maintain a traffic filter for an ANS
Team if at least one member of the team has an "Operational" DCB status. However, if any adapter on the
team does not have an "Operational" DCB status, the iSCSI Agent will log an error in the Windows Event Log