ZyXEL MI-7248 User Guide - Page 72
Switch Setup, MS-7206 User's Guide, Switch Setup, continued
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Chapter 9 Switch Setup Table 11 Switch Setup (continued) LABEL DESCRIPTION GARP Timer: Switches join VLANs by making a declaration. A declaration is made by issuing a Join message using GARP. Declarations are withdrawn by issuing a Leave message. A Leave All message terminates all registrations. GARP timers set declaration timeout values. See Chapter 13 on page 83 for more information. Join Timer Join Timer sets the duration of the Join Period timer for GVRP in milliseconds. Each port has a Join Period timer. The allowed Join Time range is between 100 and 65535 milliseconds; the default is 200 milliseconds. See the chapter on VLAN setup for more background information. Leave Timer Leave Time sets the duration of the Leave Period timer for GVRP in milliseconds. Each port has a single Leave Period timer. Leave Time must be two times larger than Join Timer; the default is 600 milliseconds. Leave All Timer Leave All Timer sets the duration of the Leave All Period timer for GVRP in milliseconds. Each port has a single Leave All Period timer. Leave All Timer must be larger than Leave Timer. Priority Queue Assignment Use this section to configure the priority level-to-physical queue mapping. IEEE 802.1p defines up to eight separate traffic types by inserting a tag into a MAClayer frame that contains bits to define class of service. Frames without an explicit priority tag are given the default priority of the ingress port. See Chapter 12 on page 79 to configure the default priority. The switch has eight physical queues that you can map to the 8 priority levels. On the switch, traffic assigned to higher index queues gets through faster while traffic in lower index queues is dropped if the network is congested. Priority Level The following descriptions are based on the traffic types defined in the IEEE 802.1d standard (which incorporates the 802.1p). level7 Typically used for network control traffic such as router configuration messages. level6 Typically used for voice traffic that is especially sensitive to jitter (jitter is the variations in delay). level5 Typically used for video that consumes high bandwidth and is sensitive to jitter. level4 Typically used for controlled load, latency-sensitive traffic such as SNA (Systems Network Architecture) transactions. level3 Typically used for "excellent effort" or better than best effort and would include important business traffic that can tolerate some delay. level2 This is for "spare bandwidth". level1 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. level0 Typically used for best-effort traffic. Apply Click Apply to save your changes to the switch's run-time memory. The switch loses these changes if it is turned off or loses power, so use the Save link on the top navigation panel to save your changes to the non-volatile memory when you are done configuring. Cancel Click Cancel to reset the fields. 72 MS-7206 User's Guide