ZyXEL Communications ES3500 Series Join, Leave, Timer, Level, Level, Level, Level, Level, Level, Level, Level, Apply, delay), Cancel, Leave All, Aging Time, Join Timer, Leave Timer

Chapter 8 Basic Setting

Table 15 Basic Setting > Switch Setup (continued)

LABEL	DESCRIPTION
Aging Time	Enter a time from 10 to 3000 seconds. This is how long all dynamically learned MAC
	addresses remain in the MAC address table before they age out (and must be relearned).

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 Declarations are withdrawn by issuing a Leave message.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 the chapter on VLAN setup for more background 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

IEEE 802.1p defines up to eight separate traffic types by inserting a tag into a MAC-layer frame that contains bits to define class of service. Frames without an explicit priority tag are given the default priority of the ingress port. Use the next fields to configure the priority level-to-physical queue mapping.

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).

Level 7	Typically used for network control traffic such as router configuration messages.
Level 6	Typically used for voice traffic that is especially sensitive to jitter (jitter is the variations in
	delay).
Level 5	Typically used for video that consumes high bandwidth and is sensitive to jitter.
Level 4	Typically used for controlled load, latency-sensitive traffic such as SNA (Systems Network
	Architecture) transactions.
Level 3	Typically used for “excellent effort” or better than best effort and would include important
	business traffic that can tolerate some delay.
Level 2	This is for “spare bandwidth”.
Level 1	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.
Level 0	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.

90
	ES3500 Series User’s Guide