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DES-3226 NWay Standalone Fast Ethernet Switch User’s Guide
Advanced Settings
Figure 7-3. Switch Information (Advanced Settings) window
After making the desired advanced setting Layer 2 changes, click Apply to let them take effect.
The information in the window is described as follows:
• Auto-Logout [2 Minutes]– This sets the time the interface can be idle before the Switch
automatically logs-out the user. The options are 2 minutes, 5 minutes, 10 minutes, 15 minutes, or
Never.
• MAC Address Aging Time [300 ] – This field specifies the length of time a learned MAC Address will
remain in the forwarding table without being accessed (that is, how long a learned MAC Address is
allowed to remain idle). The Aging Time can be set to any value between 10 and 1,000,000 seconds.
Note: A very long Aging Time can result with the out-of-date Dynamic Entries that may cause
incorrect packet filtering/forwarding decisions. A very short aging time may cause entries to
be aged out to soon, resulting in a high percentage of received packets whose source
addresses cannot be found in the address table, in which case the Switch will broadcast the
packet to all ports, negating many of the benefits of having a Switch.
• IGMP Snooping [Disabled] – This setting enables Internet Group Management Protocol (IGMP)
Snooping, which enables the Switch to read IGMP packets being forwarded through the Switch in
order to obtain forwarding information from them (learn which ports contain Multicast members.
• GVRP Status [Enabled] – Group VLAN Registration Protocol is a protocol that allows members to
dynamically join VLANs. This is used to enable or disable GVRP on the Switch
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