XGS-4728F User’s Guide
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Queuing Method
This chapter introduces the queuing methods supported.
22.1 Queuing Method Overview
Queuing is used to help solve performance degradation when there is network
congestion. Use the Queuing Method screen to configure queuing algorithms for
outgoing traffic. See also Priority Queue Assignment in Switch Setup and
802.1p Priority in Port Setup for related information.
Queuing algorithms allow switches to maintain separate queues for packets from
each individual source or flow and prevent a source from monopolizing the
bandwidth.
22.1.1 Strictly Priority
Strictly Priority (SP) services queues based on priority only. As traffic comes into
the Switch, traffic on the highest priority queue, Q7 is transmitted first. When that
queue empties, traffic on the next highest-priority queue, Q6 is transmitted until
Q6 empties, and then traffic is transmitted on Q5 and so on. If higher priority
queues never empty, then traffic on lower priority queues never gets sent. SP
does not automatically adapt to changing network requirements.
22.1.2 Weighted Fair Queuing
Weighted Fair Queuing is used to guarantee each queue's minimum bandwidth
based on its bandwidth weight (the number you configure in the Weight field)
when there is traffic congestion. WFQ is activated only when a port has more
traffic than it can handle. Queues with larger weights get more guaranteed
bandwidth than queues with smaller weights. By default, the weight for Q0 is 1,
for Q1 is 2, for Q2 is 3, and so on.
The weights range from 1 to 15 and the actual guaranteed bandwidth is calculated
as follows:
Summary of Contents for XGS-4728F
Page 2: ......
Page 8: ...Safety Warnings XGS 4728F User s Guide 8 ...
Page 24: ...24 ...
Page 30: ...Chapter 1 Getting to Know Your Switch XGS 4728F User s Guide 30 ...
Page 34: ...Chapter 2 Hardware Installation and Connection XGS 4728F User s Guide 34 ...
Page 42: ...Chapter 3 Hardware Overview XGS 4728F User s Guide 42 ...
Page 44: ...44 ...
Page 78: ...Chapter 7 System Status and Port Statistics XGS 4728F User s Guide 78 ...
Page 92: ...Chapter 8 Basic Setting XGS 4728F User s Guide 92 ...
Page 94: ...94 ...
Page 114: ...Chapter 9 VLAN XGS 4728F User s Guide 114 ...
Page 118: ...Chapter 10 Static MAC Forward Setup XGS 4728F User s Guide 118 ...
Page 148: ...Chapter 14 Bandwidth Control XGS 4728F User s Guide 148 ...
Page 162: ...Chapter 17 Link Aggregation XGS 4728F User s Guide 162 ...
Page 186: ...Chapter 21 Policy Rule XGS 4728F User s Guide 186 ...
Page 230: ...Chapter 25 AAA XGS 4728F User s Guide 230 ...
Page 268: ...268 ...
Page 324: ...324 ...
Page 332: ...Chapter 38 Maintenance XGS 4728F User s Guide 332 ...
Page 358: ...Chapter 41 Syslog XGS 4728F User s Guide 358 ...
Page 366: ...Chapter 42 Cluster Management XGS 4728F User s Guide 366 ...
Page 370: ...Chapter 43 MAC Table XGS 4728F User s Guide 370 ...
Page 374: ...Chapter 44 IP Table XGS 4728F User s Guide 374 ...
Page 378: ...Chapter 46 Routing Table XGS 4728F User s Guide 378 ...
Page 382: ...382 ...
Page 392: ...Chapter 48 Troubleshooting XGS 4728F User s Guide 392 ...
Page 402: ...Chapter 49 Product Specifications XGS 4728F User s Guide 402 ...
Page 404: ...404 ...
Page 408: ...Appendix A Legal Information XGS 4728F User s Guide 408 ...