ZyXEL P-660HW-T1 v2 User Guide - Page 183
Bandwidth Management Priorities
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P-660HW-T v2 User's Guide • Research requires more bandwidth but only gets its budgeted 2048 kbps because all of the unbudgeted and unused bandwidth goes to the higher priority sales and marketing classes. 13.6.2.2 Fairness-based Allotment of Unused and Unbudgeted Bandwidth The following table shows the amount of bandwidth that each class gets. Table 68 Fairness-based Allotment of Unused and Unbudgeted Bandwidth Example BANDWIDTH CLASSES AND ALLOTMENTS Root Class: 10240 kbps Administration: 1024 kbps Sales: 3072 kbps Marketing: 3072 kbps Research: 3072 kbps Suppose that all of the classes except for the administration class need more bandwidth. • Each class gets up to its budgeted bandwidth. The administration class only uses 1024 kbps of its budgeted 2048 kbps. • The ZyXEL Device divides the total 3072 kbps total of unbudgeted and unused bandwidth equally among the other classes. 1024 kbps extra goes to each so the other classes each get a total of 3072 kbps. 13.6.3 Bandwidth Management Priorities The following table describes the priorities that you can apply to traffic that the ZyXEL Device forwards out through an interface. Table 69 Bandwidth Management Priorities PRIORITY LEVELS: TRAFFIC WITH A HIGHER PRIORITY GETS THROUGH FASTER WHILE TRAFFIC WITH A LOWER PRIORITY IS DROPPED IF THE NETWORK IS CONGESTED. High Mid Low Typically used for voice traffic or video that is especially sensitive to jitter (jitter is the variations in delay). Typically used for "excellent effort" or better than best effort and would include important business traffic that can tolerate some delay. This is typically used for non-critical "background" traffic such as bulk transfers that are allowed but that should not affect other applications and users. Chapter 13 Bandwidth Management 183