Comparisons Among Congestion Management Technologies - 3Com 3C13636 Configuration Manual

Router 3000 ethernet family

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3Com Router 3000 Ethernet Family

Configuration Guide

or video into high-priority queue and send it first, thus minimizing delay and jitter and

ensuring the quality of audio or video service which is sensitive to delay.

Packets sent from

this interface

Figure 3-5 RTP queuing diagram

As shown in the above figure, an RTP packet is sent into a high priority queue. RTP

packet is the UDP packet whose port number is even. The range of the port number is

custom. RTP priority queue can be used along with any queue (e.g., FIFO, PQ, CQ,

WFQ and CBQ), while it has the highest priority. Since LLQ of CBQ can also be used to

solve real-time service, it is recommended not to use RTP together with CBQ.

3.1.2 Comparisons among Congestion Management Technologies

3Com routers will provide several congestion management technologies. Breaking

through the single congestion management policy of FIFO for traditional IP equipment,

they provide strong QoS ability, which meets the demands of different service quality

required by different applications. For efficient use of congestion management

technologies, the following table compares the available queuing technologies.

Classification

Other queueing

Mechanism: FQ,

3Com Corporation

Chapter 3 Congestion Management

Outgoing first

Sent packets

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3c13636-us - router 3036 3000 series