Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 50)

NOTE
For FCX devices, when you reset buffer values for the 10 Gbps ports, the buffer values for the rear-
panel 10 Gbps and16 Gbps ports are also reset.
1. Configure the allowable port descriptors. Port descriptors set the limit for the ports. The minimum
limit for the port descriptors is 16. The maximum limit of the port descriptors depends on the
hardware device. Port descriptor limits of different platforms are listed in the section
Buffer and
descriptor maximum and default allocation values on page 54. Configure the allowable port
descriptors by entering a command similar to the following.
device# qd-descriptor 1 2 76
Syntax: [no] qd-descriptor devicenum porttypeval numdescriptors
The devicenum variable refers to the device in the stacking unit. The device number starts from 0.
The porttypeval variable is 1 for 1 Gbps ports and 2 for 10 Gbps ports.
The numdescriptors variable refers to the number of descriptors to allocate.
2. Configure the queue descriptors. The minimum limit for queue descriptors is 16. The system default
queue descriptors for different platforms are listed in Buffer and descriptor maximum and default
allocation values on page 54. Configure the queue descriptors for the queue by entering a
command similar to the following.
device# qd-descriptor 1 2 76 2
Syntax: [no] qd-descriptor devicenum porttypeval numdescriptors priorityqueue
The devicenum variable refers to the device in the stacking unit. The device number starts from 0.
The porttypeval variable is 1 for 1 Gbps ports and 2 for 10 Gbps ports.
The numdescriptors variable refers to the number of descriptors to allocate.
The priorityqueue variable refers to the specific queue of the port from 0 through 7.
3. Configure the port buffers. The minimum limit for port buffers is 16. The maximum limit for the port
buffer depends on the hardware device. Port buffer limits of different platforms are listed in Buffer
and descriptor maximum and default allocation values on page 54. Configure the allowable packet
buffers by entering a command similar to the following.
device# qd-buffer 1 2 76
Syntax: [no] qd-buffer devicenum porttypeval numbuffers
The devicenum variable refers to the device in the stacking unit. The device number starts from 0.
The porttypeval variable is 1 for 1 Gbps ports and 2 for 10 Gbps ports.
The numbuffers variable refers to the number of buffers to allocate.
4. Configure the queue buffers. The maximum limit of queue buffers depends on the hardware device.
Queue buffer limits of different platforms are listed in Buffer and descriptor maximum and default
allocation values on page 54. Configure the queue buffers by entering a command similar to the
following.
device# qd-buffer 1 2 76 2
Syntax: [no] qd-buffer devicenum porttypeval numbuffers priorityqueue
The devicenum variable refers to the device in the stacking unit. The device number starts from 0.
The porttypeval variable is 1 for 1 Gbps ports and 2 for 10 Gbps ports.
The numbuffers variable refers to the number of buffers to allocate.
The priorityqueue variable refers to the specific queue of the port from 0 through 7.
Basic Layer 2 Features
50 FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide
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