ZyXEL Communications metrogigabit switch 107, Vlan port isolation or private Vlan and Mrstp on

	Chapter 8 Basic Setting
Table 11 Basic Setting > Switch Setup (continued)
LABEL	DESCRIPTION
Smart	Select Active to enable smart isolation on the Switch. The designated
Isolation	port(s) then becomes the isolated port. Smart isolation allows you to
	prevent isolated ports on different switches from transmitting traffic to
	each other.
	Note: To use smart isolation, you should have configured 802.1Q
	VLAN port isolation or private VLAN and (M)RSTP on the
	Switch. Smart isolation does not work with MSTP and/or port-
	based VLAN.
MAC Address	MAC address learning reduces outgoing traffic broadcasts. For MAC
Learning	address learning to occur on a port, the port must be active.
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 Declarations are withdrawn by issuing a Leave message.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	Leave All Timer sets the duration of the Leave All Period timer for GVRP in
Timer	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.

MGS3700-12C User’s Guide

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