Specifications

Managing the Layer 2 Forwarding Database
4-20 Configuring and Managing Ports and VLANs
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TheEnfieldindi cateswhetherrestrictionisenabled.TheDropsfieldindicateshowmanypackets
wereaddresseddirectlyfromoneclienttoanotheranddroppedbyMSS.TheHitsfieldindicates
howmanypacketsthepermitteddefaultrouterhasreceivedfromclients.
Toresetthestatisticscounters,usethefollowingcommand:
clear security l2-restrict counters [vlan vlan-id | all]
Displaying VLAN Information
TodisplayVLANconfigurationinformation,usethefollowingcommand:
show vlan config [vlan-id]
Example
TodisplayinformationforVLANburgundy,typethefollowingcommand:
show vlan config burgundy
Admin VLAN Tunl Port
VLAN Name Status State Affin Port Tag State
---- ---------------- ------ ----- ----- ---------------- ----- -----
2 burgundy Up Up 5
2 none Up
(Forinformationaboutthefieldsintheoutput,seetheRoamAboutMobilitySystemSoftware
CommandLineInterfaceReferenceGuide.)
Managing the Layer 2 Forwarding Database
ARoamAbout SwitchusesaLayer2forwardingdatabase(FDB)toforwardtrafficwithinaVLAN.
TheentriesintheforwardingdatabasemapMACaddressestothephysicalorvirtualports
connectedtothoseMACaddresseswithinaparticularVLAN.Toforwardapackettoanother
deviceinaVLAN,the
RoamAboutSwitchsearchestheforwardingdatabaseforthepacket’s
destinationMACaddress,thenforwardsthepacketouttheportassociatedwiththe MAC
address.
Types of Forwarding Database Entries
Theforwardingdatabasecancontainthefollowingtypesofentries:
• Dynamic—Adynamicentryisatemporaryentrytha tremainsinthedatabaseonlyuntilthe
entryisnolongerused.Bydefault,adynamicentryagesoutifitremainsunusedfor300
seconds(5minutes).Alldynamicentriesareremoved
iftheRoamAboutSwitchispowered
downorrebooted.
Note: The display can include and wired authentication ports, because MSS dynamically adds these
ports to a VLAN when handling user traffic for the VLAN.