ZyXEL Communications GS3700 Series User Manual page 57

Table 11 Basic Setting > Switch Setup (continued)
LABEL DESCRIPTION
MAC Address MAC address learning reduces outgoing traffic broadcasts. For MAC address learning to
Learning 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).
ARP Aging Time Enter a time from 10 to 1000000 seconds. This is how long dynamically learned ARP
entries remain in the ARP table before they age out (and must be relearned). The setting
here applies to ARP entries which are newly added in the ARP table after you click Apply.
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 Declarations are withdrawn by issuing a Leave message.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
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
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.
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 begin configuring this screen afresh.
Chapter 6 Basic Setting
GS3700/XGS3700 Series User's Guide
57
Chapter 7 on page 81 for more background
Chapter 7 on page 81 for more