Tyco 0-1591099-x manual Misc Configuration, MAC Address Aging Time, Broadcast Storm Filter

24 Port Stackable Managed Switch – User Guide Page 31

Misc Configuration

This menu is selected from the Switch Configuration menu screen and enables configuration of the remaining Switch-specific variables such as MAC Ageing time, Broadcast Storm, Stacking mode etc.

Figure 29. Misc Configuration Screen

MAC Address Aging Time

This setting specifies the time that a dynamic MAC address can remain in the Switch tables before the value is “aged out”. The valid range is 300 to 765 seconds. The default value is 300 seconds, which is the industry standard duration. This value rarely needs to be modified.

Broadcast Storm Filter

This is used to limit the number of packets flowing through the Switch that do not have associated entries in the Switch tables (Destination Look-Up Failures) or excessive broadcast transmissions. In some instances, this high level of DLF/broadcast traffic can degrade network performance. To minimize this problem, the Switch can be programmed to limit the amount of broadcast traffic that can flow through the Switch. In normal networks, only a few percent of traffic would normally be broadcasts.

This mode is accessed from the Misc. Configuration screen and is changed by selecting <edit> from the action line and then using <tab> key for navigation to Broadcast Storm field. Use the <spacebar> to step through the valid thresholds:

•N/A (Disabled)

•5%

•10%

•15%

•20%

•25%

The default value is 5%. After the required threshold value has been selected, use the <esc> key to return to the action line and then select <apply> to store the value.

Product Number 0-1591099-x © Tyco Electronics 2005 Issue 1