Specifications

5-2 VLAN Commands
clear fdb
Deletesanentryfromtheforwardingdatabase(FDB).
Syntax
clear fdb {perm | static | dynamic | port port‐list} [vlan vlan‐id] [tag tag‐value]
Parameters
Defaults
None.
Mode
Enabled.
Usage
Youcandeleteforwardingdatabaseentriesbasedonentrytype,port,orVLAN.AVLANnameor
numberisrequiredfordeletingpermanentorstaticentries.
Examples
ThefollowingcommandclearsallstaticforwardingdatabaseentriesthatmatchVLANblue:
RBT-8100# clear fdb static vlan blue
success: change accepted.
perm Clearspermanententries.Apermanententrydoesnotageoutandremains
inthedatabaseevenafterareboot,reset,orpowercycle.Youmustspecifya
VLANnameornumberwiththisoption.
static Clearsstaticentries.Astaticentry doesnotageout,butisremovedfromthe
database
afterareboot,reset,orpower cycle.YoumustspecifyaVLAN
nameornumberwiththisoption.
dynamic Clearsdynamicentries.Adynamicentryisautomaticallyremovedthrough
agingorafterareboot,reset,orpowercycle.Youarenotrequiredtospecify
aVLANnameornumberwiththis
option.
port port‐list Clearsdynamicentriesthatmatchdestinationportsintheportlist.Youare
notrequiredtospecifyaVLANnameornumberwiththisoption.
vlan vlan‐id VLANnameornumber—requiredforremovingpermanentandstatic
entries.Fordynamicentries,specifyingaVLANremovesentriesthatmatch
onlythatVLAN.Otherwise,dynamicentriesthatmatchallVLANsare
removed.
tag tag‐value VLANtagvaluethatidentifiesavirtualport.Ifyoudonotspecifyatag
value,MSSdeletesonlyentries thatmatchuntaggedinterfaces.Specifyinga
tagvaluedeletesentriesthatmatchonlythespecifiedtaggedinterface.