Configuration Guide User guide

590 FastIron Configuration Guide
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Dynamic buffer allocation for FCX, FWS, and ICX devices
Configuring buffer profiles
There are two different methods of allocating buffers and descriptors to the ports and its queues.
One method uses the qd-descriptor and qd-buffer CLI commands to allocate descriptors and
buffers, respectively, to the port and its queues. This method is available on FWS, FCX, and ICX
devices.
The other method uses user-configurable buffer profiles. This method allows you to define a
template of buffer allocations to be used on a per-port per-queue basis on the devices. When
applied, this buffer profile acts as if you created a series of the qd commands. This buffer profile is
a simpler form of allocating descriptors and buffers to the port and its queues. This method is
available on FCX and ICX devices.
Configuring buffer profiles with qd-descriptor and qd-buffer commands on FCX,
FWS, and ICX devices
The 48-port Brocade stackable switch has two packet processors. The 24-port Brocade stackable
switch has a single packet processor. For devices in an IronStack, each stack unit has the
possibility of two packet processors, but the second processor for a 24-port stack unit cannot be
configured. The number of actual available packet processors depends on the type and number of
switches in the stack.