Dcb for linux, Hyper-v (dcb and vmq), Dcb installation on windows server – Dell Intel PRO Family of Adapters User Manual
Page 40: Background
A non-operational status is most likely to occur when Use Switch Settings is selected. This is generally a
result of one or more of the DCB features not getting successfully exchanged with the switch. Possible
problems include:
One of the features is not supported by the switch.
The switch is not advertising the features.
The switch or host has disabled the feature (this would be an advanced setting for the host).
Disable/enable DCB
Troubleshooting information
Hyper-V (DCB and VMQ)
NOTE: Configuring a device in VMQ + DCB mode reduces the number of VMQs available for guest OSes.
DCB Installation on Windows Server
To install the DCB component on Windows Server 2008 or Windows Server 2012 operating system,
1. Double click on the setup.exe file.
2. Select the option to install DCB (FCoE).
does not install the DCB component of the Intel driver due to the
requirement of a Microsoft initiated reboot. To install the DCB (FCoE) component,
1. Go to the Control Panel and select Add/Remove Programs.
2. Select the Intel Network Connections program and click the Modify button.
3. Select the option to install DCB (FCoE).
DCB for Linux
Background
In the 2.4.x kernel, qdiscs were introduced. The rationale behind this effort was to provide QoS in software, as hardware did
not provide the necessary interfaces to support it. In 2.6.23, Intel pushed the notion of multiqueue support into the qdisc
layer. This provides a mechanism to map the software queues in the qdisc structure into multiple hardware queues in
underlying devices. In the case of Intel adapters, this mechanism is leveraged to map qdisc queues onto the queues within
our hardware controllers.
Within the Data Center, the perception is that traditional Ethernet has high latency and is prone to losing frames, rendering it
unacceptable for storage applications.