System information

Publication date: Feb., 2012
Revision A1
- 52 -
CLIReferenceGuide
Copyright @ 2012 by Amer Networks
Chapter 15 FdbCommandsofCLI
Fdb(Filtering
DataBase)
Filtering DataBase Configuration gathersmanyfunctions,including MAC
Table Information, Static MAC Learning, which cannot be categorized to
somefunctiontype.
MACtable
Switching of frames is based upon the DMAC address contained in the
frame. The switch builds up a table that maps MAC addresses to switch
ports for
 knowing which ports the framesshould go to (based upon the
DMACaddressintheframe).Thistablecontainsbothstaticanddynamic
entries.Thestatic entriesare configured by the networkadministrator if
the administrator wants to do a fixed mapping between the DMAC
addressandswitchports.
The
framesalsocontainaMACaddress(SMACaddress),whichshowsthe
MAC addressof the equipmentsending the frame.The SMAC address is
used by the switch to automatically update the MAC table with these
dynamic MAC addresses. Dynamic entries are removed from the MAC
table if no frame with the
 corresponding SMAC address has been seen
afteraconfigurableagetime
Table 14: fdb Commands
Command Function
age-time
Configure aging time of MAC address
delete
Delete commands
flush
Flush out dynamic learned MAC address
learning
Configure learning mode of switch ports
static-mac
Configure static MAC address
show
Show MAC address table information
age‐time: The command lets you to configure the age‐time of
MACaddr ess
Syntax:
age-time disable/ <10-10000>
Parameter :
disable The parameter let you to disable automatic aging.
<10-1000000> The parameter let you to configure the available
age-time value is from 10 to 1000000 secs.
EXAMPLE: