Dell Emulex Family of Adapters - Manual (Page 1279)

OneCommand Manager for VMware vCenter Version 10.2 User Manual P010089-01A Rev. A
6. Managing Adapters and Ports
OCe14100–Series Adapters
1279
UMC channel protocol assignments are subject to the following rules:

The first channel can only be assigned NIC protocols. The first channel cannot
be assigned None.

The second and third channels can be assigned the following:

NIC

None (channel disabled)

Storage protocol (third channel only when concurrent mode storage is
available)

If storage protocols are assigned to the second and third channels, they must
be different storage protocols.

The fourth and higher channels (if available) can only be assigned NIC or None
(channel is disabled).

A channel's logical link is set to down by setting both the minimum and
maximum bandwidths to 0.

The total minimum bandwidth for all enabled channels on a port must add up
to 100, except in the case where all the maximum bandwidths are 0 (for
example, setting a logical link down on all channels).

The maximum bandwidth for each channel must be greater than or equal to the
minimum bandwidth for that channel.

LPVIDs (range 2-4094) must be assigned to all NIC channels and must be
unique across all NIC channels on a port. However, any or all of the LPVIDs on
one port can be repeated on another port.
Default UMC Settings
Most hosts today do not support ARI, therefore the default UMC settings are designed
to prevent enabling functions that require ARI (when possible). This prevents the
possibility of enabling channels that are not seen on the PCI bus when the system boots.
There is one case where functions requiring ARI are enabled when UMC is enabled. On
a four port adapter, when UMC is disabled, if the third function on each port is already
enabled when UMC is enabled, that function continues to be enabled. In this case, it is
assumed that you previously enabled the third function because ARI was available.
When UMC is enabled, the channels are assigned default values based upon the
following rules:
For each port:

All enabled functions (i.e. functions not set to None) continue to be enabled,
running the same protocol before UMC was enabled even if its function number
is greater than seven (only possible on 4 four-port adapters).

Any channel with a function number less than eight is enabled with NIC.

Any channel with a function number greater than seven is set to None (channel
is disabled).

The minimum bandwidths are assigned by dividing up 100% as evenly as
possible between the enabled channels.

The maximum bandwidths for the enabled channels are set to 100.