Allied Telesis AT-S63 - Manual (Page 112)

Chapter 6: Port Parameters
112 Section I: Basic Features
For example, referring to the figure above, when the utilization of the
storage capacity of port D exceeds the threshold, the switch signals the
other ports to discard packets destined for port D. Port A drops the D
packets, enabling it to once again forward packets to port C.
The number that you enter for this value represents cells. A cell is 64
bytes. The range is 0 to 8191 cells. The default is 8191.
To set up head of line blocking, perform the following procedure:
1. From the Main Menu, type 1 to select Port Configuration.
The Port Configuration menu is shown in Figure 26 on page 106.
2. From the Port Configuration menu, type 1 to select Port
Configuration.
The following prompt is displayed:
Enter port-list ->
3. Enter the number of the port you want to configure. To configure a
range of ports, enter the first and last ports of the range, separated by
a dash (for example, 4-8). You cannot specify nonconsecutive ports
(for example, 5,7,9)
The Port Configuration menu is shown in Figure 27 on page 107.
4. From the Port Configuration menu, type 2 to select HOL BLocking
Prevention Threshold.
The following prompt is displayed:
Enter HOL Blocking Prevention Threshold (128 byte
cells) : [1 to 8191] -> 8191
5. Enter the threshold in cells. A cell equals 64 bytes. The range is 1 to
8191 cells. The default is 8191.
6. After making changes, type R until you return to the Main Menu. Then
type S to select Save Configuration Changes.