ZyXEL Communications 4528F User Manual

 Chapter 8 Basic Setting

XGS-4526/4528F/4728F User’s Guide

Smart 
Isolation

Select Active to enable smart isolation on the Switch. The designated 
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 
Learning

MAC address learning reduces outgoing traffic broadcasts. For MAC 
address learning to occur on a port, the port must be active.

Aging Time 

Enter a time from 10 to 1000000 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 Declarations are withdrawn by issuing a Leave 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 

 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 

 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 following 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.

Table 12   Basic Setting > Switch Setup  (continued)