Typical Configuration Example; Pq Configuration Example - 3Com 3C13636 Configuration Manual

3Com Router 3000 Ethernet Family
Configuration Guide
are configured, to lose effect. To resolve this problem, the token function of QoS was
introduced into V 2.41. This function provides a flow control mechanism at the
underlying layer queuing level. It can control the number of packets sent to the
underlying interface queues based on the number of tokens.
If FTP applies, you are recommended to set the number of tokens sent by an interface
to 1.
If the upper layer protocol, UDP for example, does not provide flow control, you are not
recommended to use the token function of QoS in order to improve efficiency of data
transfer.
Perform the following configuration in interface view.
Table 3-59 Configure the token function of QoS
Configure the token function of QoS.
Disable the token function of QoS.
By default, the token function of QoS is disabled.
Note:
After you configure this command on an interface, you must perform shutdown and
undo shutdown on the interface to have the function take effect.
So far, this command is supported only by Ethernet, serial, and BRI interfaces.

3.8 Typical Configuration Example

3.8.1 PQ Configuration Example

I. Network requirements
As shown in the diagram, both Server and PC1 send data to PC2 through router
3Com1. Suppose Server sends key service data and PC1 sends common service data.
Congestion may occur on interface serial2/0/0 resulting in packet loss because the rate
of the incoming interface ethernet0/0/0 is larger than that of the outgoing interface
serial2/0/0 on 3Com1. The mission-critical service data has priority when network
congestion occurs.
Operation
3Com Corporation
3-37
Chapter 3 Congestion Management
Command
qmtoken token-number
undo qmtoken