Catalyst 3750-E and 3560-E Switch Cisco IOS ... - DNIP . NET

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l2protocol-tunnelChapter 2Catalyst 3750-E and 3560-E Switch Cisco IOS Commandsl2protocol-tunnelUse the l2protocol-tunnel interface configuration command on the switch stack or on a standaloneswitch to enable tunneling of Layer 2 protocols on an access port, IEEE 802.1Q tunnel port, or a portchannel. You can enable tunneling for Cisco Discovery Protocol (CDP), Spanning Tree Protocol (STP),or VLAN Trunking Protocol (VTP) packets. You can also enable point-to-point tunneling for PortAggregation Protocol (PAgP), Link Aggregation Control Protocol (LACP), or UniDirectional LinkDetection (UDLD) packets. Use the no form of this command to disable tunneling on the interface.l2protocol-tunnel [cdp | stp | vtp] [point-to-point [pagp | lacp | udld]] | [shutdown-threshold[cdp | stp | vtp] [point-to-point [pagp | lacp | udld]]] value] | [drop-threshold [cdp | stp | vtp][point-to-point [pagp | lacp | udld]] value]no l2protocol-tunnel [cdp | stp | vtp] [point-to-point [pagp | lacp | udld]] | [shutdown-threshold[cdp | stp | vtp] [point-to-point [pagp | lacp | udld]]] | [drop-threshold [cdp | stp | vtp][point-to-point [pagp | lacp | udld]]]Syntax Descriptionl2protocol-tunnelcdpstpvtppoint-to-pointpagplacpudldshutdown-thresholddrop-thresholdvalueEnable point-to-multipoint tunneling of CDP, STP, and VTP packets.(Optional) Enable tunneling of CDP, specify a shutdown threshold for CDP, orspecify a drop threshold for CDP.(Optional) Enable tunneling of STP, specify a shutdown threshold for STP, orspecify a drop threshold for STP.(Optional) Enable tunneling or VTP, specify a shutdown threshold for VTP, orspecify a drop threshold for VTP.(Optional) Enable point-to point tunneling of PAgP, LACP, and UDLD packets.(Optional) Enable point-to-point tunneling of PAgP, specify a shutdownthreshold for PAgP, or specify a drop threshold for PAgP.(Optional) Enable point-to-point tunneling of LACP, specify a shutdownthreshold for LACP, or specify a drop threshold for LACP.(Optional) Enable point-to-point tunneling of UDLD, specify a shutdownthreshold for UDLD, or specify a drop threshold for UDLD.(Optional) Set a shutdown threshold for the maximum rate of Layer 2 protocolpackets per second to be received before an interface is shut down.(Optional) Set a drop threshold for the maximum rate of Layer 2 protocolpackets per second to be received before an interface drops packets.Specify a threshold in packets per second to be received for encapsulationbefore the interface shuts down, or specify the threshold before the interfacedrops packets. The range is 1 to 4096. The default is no threshold.DefaultsThe default is that no Layer 2 protocol packets are tunneled.The default is no shutdown threshold for the number of Layer 2 protocol packets.The default is no drop threshold for the number of Layer 2 protocol packets.Command ModesInterface configuration2-308Catalyst 3750-E and 3560-E Switch Command ReferenceOL-9776-08
Chapter 2Catalyst 3750-E and 3560-E Switch Cisco IOS Commandsl2protocol-tunnelCommand HistoryRelease12.2(35)SE2ModificationThis command was introduced.Usage GuidelinesYou must enter this command, with or without protocol types, to tunnel Layer 2 packets.If you enter this command for a port channel, all ports in the channel must have the same configuration.Layer 2 protocol tunneling across a service-provider network ensures that Layer 2 information ispropagated across the network to all customer locations. When protocol tunneling is enabled, protocolpackets are encapsulated with a well-known Cisco multicast address for transmission across the network.When the packets reach their destination, the well-known MAC address is replaced by the Layer 2protocol MAC address.You can enable Layer 2 protocol tunneling for CDP, STP, and VTP individually or for all three protocols.In a service-provider network, you can use Layer 2 protocol tunneling to enhance the creation ofEtherChannels by emulating a point-to-point network topology. When protocol tunneling is enabled onthe service-provider switch for PAgP or LACP, remote customer switches receive the protocol data units(PDUs) and can negotiate automatic creation of EtherChannels.To enable tunneling of PAgP, LACP, and UDLD packets, you must have a point-to-point networktopology. To decrease the link-down detection time, you should also enable UDLD on the interface whenyou enable tunneling of PAgP or LACP packets.You can enable point-to-point protocol tunneling for PAgP, LACP, and UDLD individually or for allthree protocols.CautionPAgP, LACP, and UDLD tunneling is only intended to emulate a point-to-point topology. An erroneousconfiguration that sends tunneled packets to many ports could lead to a network failure.Enter the shutdown-threshold keyword to control the number of protocol packets per second that arereceived on an interface before it shuts down. When no protocol option is specified with the keyword,the threshold is applied to each of the tunneled Layer 2 protocol types. If you also set a drop thresholdon the interface, the shutdown-threshold value must be greater than or equal to the drop-threshold value.When the shutdown threshold is reached, the interface is error-disabled. If you enable error recovery byentering the errdisable recovery cause l2ptguard global configuration command, the interface isbrought out of the error-disabled state and allowed to retry the operation again when all the causes havetimed out. If the error recovery mechanism is not enabled for l2ptguard, the interface stays in theerror-disabled state until you enter the shutdown and no shutdown interface configuration commands.Enter the drop-threshold keyword to control the number of protocol packets per second that are receivedon an interface before it drops packets. When no protocol option is specified with a keyword, thethreshold is applied to each of the tunneled Layer 2 protocol types. If you also set a shutdown thresholdon the interface, the drop-threshold value must be less than or equal to the shutdown-threshold value.When the drop threshold is reached, the interface drops Layer 2 protocol packets until the rate at whichthey are received is below the drop threshold.The configuration is saved in NVRAM.For more information about Layer 2 protocol tunneling, see the software configuration guide for thisrelease.OL-9776-08Catalyst 3750-E and 3560-E Switch Command Reference2-309
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dot1x critical (global configuratio
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dot1x critical (interface configura
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dot1x fallbackChapter 2Catalyst 375
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dot1x guest-vlanChapter 2Catalyst 3
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dot1x initializeChapter 2Catalyst 3
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dot1x mac-auth-bypassChapter 2Catal
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dot1x max-reauth-reqChapter 2Cataly
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dot1x paeChapter 2Catalyst 3750-E a
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dot1x port-controlChapter 2Catalyst
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dot1x reauthenticationChapter 2Cata
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dot1x test eapol-capableChapter 2Ca
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dot1x timeoutChapter 2Catalyst 3750
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dot1x timeoutChapter 2Catalyst 3750
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duplexChapter 2Catalyst 3750-E and
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epm access-controlChapter 2Catalyst
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errdisable detect causeChapter 2Cat
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errdisable detect cause small-frame
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errdisable recoveryChapter 2Catalys
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errdisable recoveryChapter 2Catalys
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exception crashinfoChapter 2Catalys
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fallback profileChapter 2Catalyst 3
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flowcontrolChapter 2Catalyst 3750-E
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hw-moduleChapter 2Catalyst 3750-E a
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interface port-channelChapter 2Cata
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interface rangeChapter 2Catalyst 37
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interface vlanChapter 2Catalyst 375
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ip access-groupChapter 2Catalyst 37
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ip addressChapter 2Catalyst 3750-E
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ip admissionChapter 2Catalyst 3750-
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ip admission name proxy httpChapter
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ip arp inspection filter vlanChapte
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ip arp inspection limitChapter 2Cat
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ip arp inspection log-bufferChapter
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ip arp inspection trustChapter 2Cat
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ip arp inspection validateChapter 2
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ip arp inspection vlan loggingChapt
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ip device trackingChapter 2Catalyst
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ip device tracking probeChapter 2Ca
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ip dhcp snoopingChapter 2Catalyst 3
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ip dhcp snooping bindingChapter 2Ca
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ip dhcp snooping databaseChapter 2C
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ip dhcp snooping information option
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ip dhcp snooping information option
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ip dhcp snooping limit rateChapter
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ip dhcp snooping verifyChapter 2Cat
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ip igmp filterChapter 2Catalyst 375
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ip igmp snooping last-member-query-
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mls qos queue-set output buffersCha
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mls qos rewrite ip dscpChapter 2Cat
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mls qos srr-queue input bandwidthCh
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mvr (global configuration)Chapter 2
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mvr (interface configuration)Chapte
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no dot1x syslog verboseChapter 2Cat
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pagp learn-methodChapter 2Catalyst
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permit (ARP access-list configurati
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port-channel load-balanceChapter 2C
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power inlineChapter 2Catalyst 3750-
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power inlineChapter 2Catalyst 3750-
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power rpsChapter 2Catalyst 3750-E a
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power supplyChapter 2Catalyst 3750-
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priority-queueChapter 2Catalyst 375
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private-vlanChapter 2Catalyst 3750-
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private-vlan mappingChapter 2Cataly
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adius-server dead-criteriaChapter 2
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adius-server hostChapter 2Catalyst
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commandChapter 2Catalyst 3750-E and
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eloadChapter 2Catalyst 3750-E and 3
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emote commandChapter 2Catalyst 3750
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emote-spanChapter 2Catalyst 3750-E
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enew ip dhcp snooping databaseChapt
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eserved-onlyChapter 2Catalyst 3750-
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