Enterasys Enterasys SecureStack B2 B2G124-24 Specifikace Strana 506

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clear dhcpsnooping binding
18-14 DHCP Snooping and Dynamic ARP Inspection
Mode
Switchcommand,readwrite.
Usage
TheDHCPsnoopingapplicationprocessesincomingDHCPmessagesonenableduntrusted
interfaces.ForDHCPRELEASEandDHCPDECLINEmessages,theapplicationcomparesthe
receiveinterfaceandVLANwiththeclientʹsinterfaceandVLANinthebindingsdatabase.Ifthe
interfacesdonotmatch,theapplicationlogstheevent(iflogging
ofinvalidmessagesisenabled)
anddropsthemessage.IfsourceMACverificationisenabled,forvalidclientmessages,DHCP
snoopingcomparesthesourceMACaddresstotheDHCPclienthardwareaddress.Wherethereis
amismatch,DHCPsnoopinglogsanddropsthepacket.
Thiscommanddisplays,foreachenableduntrusted
interface,thenumberofsourceMAC
verificationfailuresandclientinterfacemismatchesthatoccurredsincethelasttimethese
statisticswerecleared.
SinceDHCPserversshouldnotbeconnectedthroughanuntrustedport,the DHCPsnooping
applicationwilldropincomingDHCPservermessagesonuntrustedinterfacesandincrementa
counterthat
isdisplayedwiththiscommand.
Example
Thisexampleshowstheoutputoftheshowdhcpsnoopingstatisticscommand.
B2(su)->show dhcpsnooping statistics
Interface MAC Verify Client Ifc DHCP Server
Failures Mismatch Msgs Rec'd
----------- ---------- ---------- -----------
ge.1.48 0 0 0
lag.0.1 0 0 0
clear dhcpsnooping binding
UsethiscommandtoremovebindingsfromtheDHCPsnoopingbindingsdatabase.
Syntax
clear dhcpsnooping binding [port port-string | mac mac-addr]
Parameters
Defaults
Ifnoparametersareentered,allbindings(staticanddynamic)areremoved.
Mode
Switchcommand,readwrite.
Example
Thisexampleclearsthestaticbindingentrythatincludesportge.1.2.
portportstring (Op tional)Specifiestheentryorentriestoremovebyportidentifier.
macmacaddr (Optional)SpecifiestheentrytoremovebyMACaddress.
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