ZyXEL Communications ZyXEL Dimension ES-3024 - Manual (Page 54)

Dimension ES-3024 Ethernet Switch
5-6 General, Switch and IP Setup
Table 5-4 Switch Setup
LABEL DESCRIPTION EXAMPLE
VLAN Type Choose 802.1Q or Port Based from the drop-down list box. The VLAN Setup
screen changes depending on whether you choose 802.1Q VLAN Type or Port
Based VLAN Type in this screen. See section 5.4 and the VLAN Setup chapter
for more information on VLANs. 802.1Q
IGMP
Snooping Select the checkbox to enable IGMP snooping and have group multicast traffic
only forwarded to ports that are members of that group, significantly reducing
multicast traffic passing through your switch. See section 5.3 for more information
on IGMP snooping.
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 0 to 1700 seconds. This is how long all dynamically learned
MAC addresses remain in the MAC address table before they age out (and must
be relearned).
300
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 Declarations are withdrawn by issuing a Leave message.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.
200 milliseconds
(default)
Leave Timer Leave Timer 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.
600 milliseconds
(default)
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; the default is 1000 milliseconds. 1000
milliseconds
(default)
Priority Queue Assignment: IEEE 802.1p defines up to 8 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 two fields to configure the priority level-to-physical queue mapping.
The switch has 4 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).
Priority 7 Typically used for network control traffic such as router configuration messages.
Priority 6 Typically used for voice traffic that is especially sensitive to jitter (jitter is the variations in delay).
Priority 5 Typically used for video that consumes high bandwidth and is sensitive to jitter.