Intel 10/100 manual Custom filtering, Get-lt-age, Set-lt-age

C H A P T E R 3 Intel Express 10/100 Fast Ethernet Switch

get-lt-age

Displays the switching database aging time in seconds. This is the amount of time the switch stores a device’s MAC address before clearing it from the database. An entry whose MAC address doesn’t appear in the source field of an incoming packet for this period of time is discarded. The default is 300 seconds.

SYS_console> get-lt-age

The running aging time is: 300 seconds

set-lt-age

set-lt-age {runnvramall} <aging_time>

Modifies the switching database aging time.

The aging_time is in seconds with a default of 300 seconds and a range of 10 to 11,000 seconds. Decrease the time if the number of active workstations is larger than 1024.

SYS_console> set-lt-age run 280

Aging Period update in the running database OK

SYS_console> set-lt-age all 100

Aging Period update in NVRAM OK

Aging Period update in the running database OK

Custom filtering

Use custom filters to ensure a device can reach other devices regardless of where the device is attached. For example, if you have a laptop computer that acts as a management station, you want to make sure you can reach your servers from anywhere on the network, even from segments that have security VLAN restrictions.

The custom filter entry for an address displays onscreen as a matrix. The source (SRC) column lists the available source ports (1 through 12, where ports 9 through 12 are for optional expansion modules which may not be installed). The other columns each represent an available destination port. A + represents a forwarding path. In the following example, each source port forwards frames to port 5. (A + isn’t listed in the P5 column because ports don’t forward frames to themselves.)

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