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Command Default

None

Command Modes

User EXEC

Command History

Modification

Release

This command was introduced.

Cisco IOS XE 3.2SE

Usage Guidelines

If you do not enter an interface ID, administrative and operational UDLD status for all interfaces appear.

Examples

This is an example of output from the

show udld interface-id

command. For this display, UDLD is enabled

on both ends of the link, and UDLD detects that the link is bidirectional. The table that follows describes the
fields in this display.

Controller>

show udld gigabitethernet2/0/1

Interface gi2/0/1
---
Port enable administrative configuration setting: Follows device default
Port enable operational state: Enabled
Current bidirectional state: Bidirectional
Current operational state: Advertisement - Single Neighbor detected
Message interval: 60
Time out interval: 5
Entry 1
Expiration time: 146
Device ID: 1
Current neighbor state: Bidirectional
Device name: Switch-A
Port ID: Gi2/0/1
Neighbor echo 1 device: Switch-B
Neighbor echo 1 port: Gi2/0/2
Message interval: 5
CDP Device name: Switch-A

Table 8: show udld Field Descriptions

Description

Field

The interface on the local device configured for
UDLD.

Interface

How UDLD is configured on the port. If UDLD is
enabled or disabled, the port enable configuration
setting is the same as the operational enable state.
Otherwise, the enable operational setting depends on
the global enable setting.

Port enable administrative configuration setting

Operational state that shows whether UDLD is
actually running on this port.

Port enable operational state

Layer 2/3 Command Reference, Cisco IOS XE Release 3E (Cisco WLC 5700 Series)

OL-32323-01

57

Layer 2/3 Commands

show udld

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Содержание WLC 5700 Series

Страница 1: ...isco WLC 5700 Series First Published June 16 2014 Last Modified 0 Americas Headquarters Cisco Systems Inc 170 West Tasman Drive San Jose CA 95134 1706 USA http www cisco com Tel 408 526 4000 800 553 NETS 6387 Fax 408 527 0883 Text Part Number OL 32323 01 ...

Страница 2: ... OR IMPLIED INCLUDING WITHOUT LIMITATION THOSE OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OF DEALING USAGE OR TRADE PRACTICE IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT SPECIAL CONSEQUENTIAL OR INCIDENTAL DAMAGES INCLUDING WITHOUT LIMITATION LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO US...

Страница 3: ...rror Messages 4 Using Configuration Logging 5 Using Command History 5 Changing the Command History Buffer Size 5 Recalling Commands 5 Disabling the Command History Feature 6 Using Editing Features 6 Enabling and Disabling Editing Features 6 Editing Commands through Keystrokes 7 Editing Command Lines that Wrap 9 Searching and Filtering Output of show and more Commands 9 Accessing the CLI 10 Accessi...

Страница 4: ...hod 34 pagp port priority 36 port channel load balance 38 port channel load balance extended 40 port channel min links 42 show etherchannel 44 show lacp 47 show pagp 52 show platform etherchannel 54 show platform pm 55 show udld 56 switchport 60 switchport access vlan 62 switchport mode 63 switchport nonegotiate 66 udld 68 udld port 70 udld reset 72 Layer 2 3 Command Reference Cisco IOS XE Release...

Страница 5: ...old font bold font Document titles new or emphasized terms and arguments for which you supply values are in italic font Italic font Terminal sessions and information the system displays appear in courier font Courier font Bold Courier font indicates text that the user must enter Bold Courier font Elements in square brackets are optional x An ellipsis three consecutive nonbolded periods without spa...

Страница 6: ...ote Notes contain helpful suggestions or references to material not covered in the manual Note Means the following information will help you solve a problem Tip Means reader be careful In this situation you might do something that could result in equipment damage or loss of data Caution Means the described action saves time You can save time by performing the action described in the paragraph Time...

Страница 7: ...and gathering additional information see the monthly What s New in Cisco Product Documentation which also lists all new and revised Cisco technical documentation at http www cisco com c en us td docs general whatsnew whatsnew html Subscribe to the What s New in Cisco Product Documentation as a Really Simple Syndication RSS feed and set content to be delivered directly to your desktop using a reade...

Страница 8: ...Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series viii OL 32323 01 Preface Obtaining Documentation and Submitting a Service Request ...

Страница 9: ...figuration status and clear commands which clear counters or interfaces The user EXEC commands are not saved when the switch reboots To have access to all commands you must enter privileged EXEC mode Normally you must enter a password to enter privileged EXEC mode From this mode you can enter any privileged EXEC command or enter global configuration mode Using the configuration modes global interf...

Страница 10: ...se this mode to configure VLAN parameters When VTP mode is transparent you can create extended range VLANs VLAN IDs greater than 1005 and save configurations in the switch startup configuration file To exit to global configuration mode enter the exit command To return to privileged EXEC mode press Ctrl Z or enter end Controller config vlan While in global configuration mode enter the vlan vlan id ...

Страница 11: ...d keywords and arguments for any command Table 2 Help Summary Purpose Command Obtains a brief description of the help system in any command mode help Obtains a list of commands that begin with a particular character string abbreviated command entry Controller di dir disable disconnect Completes a partial command name abbreviated command entry Tab Controller sh conf tab Controller show configuratio...

Страница 12: ...he command and sets variables to their default values Understanding CLI Error Messages This table lists some error messages that you might encounter while using the CLI to configure your switch Table 3 Common CLI Error Messages How to Get Help Meaning Error Message Re enter the command followed by a question mark with a space between the command and the question mark The possible keywords that you...

Страница 13: ...your needs Changing the Command History Buffer Size By default the switch records ten command lines in its history buffer You can alter this number for a current terminal session or for all sessions on a particular line These procedures are optional Beginning in privileged EXEC mode enter this command to change the number of command lines that the switch records during the current terminal session...

Страница 14: ...dures are optional To disable the feature during the current terminal session enter the terminal no history privileged EXEC command To disable command history for the line enter the no history line configuration command Using Editing Features This section describes the editing features that can help you manipulate the command line Enabling and Disabling Editing Features Although enhanced editing m...

Страница 15: ...sor back one word Press Esc B Moves the cursor forward one word Press Esc F Transposes the character to the left of the cursor with the character located at the cursor Press Ctrl T Recalls the most recent entry in the buffer Press Ctrl Y Recall commands from the buffer and paste them in the command line The switch provides a buffer with the last ten items that you deleted Recalls the next buffer e...

Страница 16: ...c U Press Ctrl V or Esc Q Designate a particular keystroke as an executable command perhaps as a shortcut Scrolls down one line Press the Return key Scroll down a line or screen on displays that are longer than the terminal screen can display The More prompt is used for any output that has more lines than can be displayed on the terminal screen including show command output You can use the Return ...

Страница 17: ... sign appears at the end of the line to show that the line has been scrolled to the right Controller config access list 101 permit tcp 131 108 2 5 255 255 255 0 131 108 1 The software assumes that you have a terminal screen that is 80 columns wide If you have a width other than that use the terminal width privileged EXEC command to set the width of your terminal Use line wrapping with the command ...

Страница 18: ...re you can access the CLI you must connect a terminal or a PC to the switch console or connect a PC to the Ethernet management port and then power on the switch as described in the hardware installation guide that shipped with your switch CLI access is available before switch setup After your switch is configured you can access the CLI through a remote Telnet session or SSH client You can use one ...

Страница 19: ...x bundle page 29 lacp port priority page 30 lacp system priority page 32 pagp learn method page 34 pagp port priority page 36 port channel load balance page 38 port channel load balance extended page 40 port channel min links page 42 show etherchannel page 44 show lacp page 47 show pagp page 52 show platform etherchannel page 54 show platform pm page 55 show udld page 56 Layer 2 3 Command Referenc...

Страница 20: ...access vlan page 62 switchport mode page 63 switchport nonegotiate page 66 udld page 68 udld port page 70 udld reset page 72 Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series 12 OL 32323 01 Layer 2 3 Commands ...

Страница 21: ...cted to a partner that is PAgP capable Use in PAgP mode with the auto or desirable keyword when traffic is expected from the other device non silent Unconditionally enables PAgP desirable Enables the on mode on Enables LACP only if a LACP device is detected passive Command Default No channel groups are assigned No mode is configured Command Modes Interface configuration Command History Modificatio...

Страница 22: ...e silent is assumed The silent mode is used when the controller is connected to a device that is not PAgP capable and rarely if ever sends packets An example of a silent partner is a file server or a packet analyzer that is not generating traffic In this case running PAgP on a physical port prevents that port from ever becoming operational However it allows PAgP to operate to attach the port to a ...

Страница 23: ...ple shows how to configure a cross stack EtherChannel in a controller stack It uses LACP passive mode and assigns two ports on stack member 2 and one port on stack member 3 as static access ports in VLAN 10 to channel 5 Controller configure terminal Controller config interface range gigabitethernet2 0 4 5 Controller config if range switchport mode access Controller config if range switchport acces...

Страница 24: ... you set the protocol by using the channel protocol command the setting is not overridden by the channel group interface configuration command You must use the channel group interface configuration command to configure the EtherChannel parameters The channel group command also can set the mode for the EtherChannel You cannot enable both the PAgP and LACP modes on an EtherChannel group PAgP and LAC...

Страница 25: ...an EtherChannel group or enables an EtherChannel mode or both channel group Displays EtherChannel information for a channel show etherchannel Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series OL 32323 01 17 Layer 2 3 Commands channel protocol ...

Страница 26: ...ounters command or you can clear only the counters for the specified channel group by using the clear lacp channel group number counters command Examples This example shows how to clear all channel group information Controller clear lacp counters This example shows how to clear LACP traffic counters for group 4 Controller clear lacp 4 counters You can verify that the information was deleted by ent...

Страница 27: ...rs command or you can clear only the counters for the specified channel group by using the clear pagp channel group number counters command Examples This example shows how to clear all channel group information Controller clear pagp counters This example shows how to clear PAgP traffic counters for group 10 Controller clear pagp 10 counters You can verify that the information was deleted by enteri...

Страница 28: ... 2SE Usage Guidelines The undebug etherchannel command is the same as the no debug etherchannel command Although the linecard keyword is displayed in the command line help it is not supported Note When you enable debugging on a stack it is enabled only on the active controller To enable debugging on the standby controller start a session from the active controller by using the session switch numbe...

Страница 29: ... events Controller debug etherchannel event Related Commands Description Command Displays EtherChannel information for a channel show etherchannel Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series OL 32323 01 21 Layer 2 3 Commands debug etherchannel ...

Страница 30: ...duced Cisco IOS XE 3 2SE Usage Guidelines The undebug etherchannel command is the same as the no debug etherchannel command When you enable debugging on a stack it is enabled only on the active controller To enable debugging on the standby controller start a session from the active controller by using the session switch number command in privileged EXEC mode Enter the debug command at the command ...

Страница 31: ...isabled Command Modes Privileged EXEC Command History Modification Release This command was introduced Cisco IOS XE 3 2SE Usage Guidelines The undebug pagp command is the same as the no debug pagp command When you enable debugging on a stack it is enabled only on the active controller To enable debugging on the standby controller start a session from the active controller by using the session swit...

Страница 32: ...mple shows how to display debug messages related to PAgP events Controller debug pagp event Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series 24 OL 32323 01 Layer 2 3 Commands debug pagp ...

Страница 33: ...fault Debugging is disabled Command Modes Privileged EXEC Command History Modification Release This command was introduced Cisco IOS XE 3 2SE Usage Guidelines The undebug platform pm command is the same as the no debug platform pm command When you enable debugging on a stack it is enabled only on the active controller To enable debugging on the standby controller start a session from the active co...

Страница 34: ...ion Optional Displays error condition debug messages error Command Default Debugging is disabled Command Modes Privileged EXEC Command History Modification Release This command was introduced Cisco IOS XE 3 2SE Usage Guidelines The undebug platform udld command is the same as the no debug platform udld command Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series 26 OL 32323 01...

Страница 35: ...he port channel interface first the channel group number can be the same as the port channel number or you can use a new number If you use a new number the channel group command dynamically creates a new port channel You create Layer 3 port channels by using the interface port channel command followed by the no switchport interface configuration command You should manually configure the port chann...

Страница 36: ... guide for this release Examples This example shows how to create a port channel interface with a port channel number of 5 Controller config interface port channel 5 You can verify your setting by entering the show running config privileged EXEC or show etherchannel channel group number detail privileged EXEC command Related Commands Description Command Assigns an Ethernet port to an EtherChannel ...

Страница 37: ...d of the link uses port priorities to determine which ports are bundled into the channel and which ports are put in hot standby mode Port priorities on the other controller the noncontrolling end of the link are ignored The lacp max bundle command must specify a number greater than the number specified by the port channel min links command Use the show etherchannel summary privileged EXEC command ...

Страница 38: ... port priority comparisons a numerically lower value has a higher priority When there are more than eight ports in an LACP channel group the eight ports with the numerically lowest values highest priority values for LACP port priority are bundled into the channel group and the lower priority ports are put in hot standby mode If two or more ports have the same LACP port priority for example they ar...

Страница 39: ...nnel group number internal privileged EXEC command Related Commands Description Command Assigns an Ethernet port to an EtherChannel group or enables an EtherChannel mode or both channel group Configures the LACP system priority lacp system priority Displays LACP channel group information show lacp Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series OL 32323 01 31 Layer 2 3 Co...

Страница 40: ...ch ports are bundled into the channel and which ports are put in hot standby mode Port priorities on the other controller the noncontrolling end of the link are ignored In priority comparisons numerically lower values have a higher priority Therefore the system with the numerically lower value higher priority value for LACP system priority becomes the controlling system If both controllers have th...

Страница 41: ...Channel mode or both channel group Configures the port priority for the Link Aggregation Control Protocol LACP lacp port priority Displays LACP channel group information show lacp Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series OL 32323 01 33 Layer 2 3 Commands lacp system priority ...

Страница 42: ...Command Modes Interface configuration Command History Modification Release This command was introduced Cisco IOS XE 3 2SE Usage Guidelines The learn method must be configured the same at both ends of the link The controller supports address learning only on aggregate ports even though the physical port keyword is provided in the command line interface CLI The pagp learn method and the pagp port pr...

Страница 43: ... learn method aggregation port You can verify your settings by entering the show running config privileged EXEC command or the show pagp channel group number internal privileged EXEC command Related Commands Description Command Selects a port over which all traffic through the EtherChannel is sent pagp port priority Displays Port Aggregation Protocol PAgP channel group information show pagp Layer ...

Страница 44: ...in the command line interface CLI The pagp learn method and the pagp port priority interface configuration commands have no effect on the controller hardware but they are required for PAgP interoperability with devices that only support address learning by physical ports such as the Catalyst 1900 switch When the link partner to the controller is a physical learner we recommend that you configure t...

Страница 45: ... learn method Sets the load distribution method among the ports in the EtherChannel port channel load balance Displays Port Aggregation Protocol PAgP channel group information show pagp Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series OL 32323 01 37 Layer 2 3 Commands pagp port priority ...

Страница 46: ...4 port number for both IPv4 and IPv6 dst port Sets extended load balance methods among the ports in the EtherChannel See the port channel load balance extended command extended Specifies load distribution based on the source and destination host IP address src dst ip Specifies load distribution based on the source and destination host MAC address src dst mac Specifies load distribution based on th...

Страница 47: ... setting by entering the show running config privileged EXEC command or the show etherchannel load balance privileged EXEC command Examples This example shows how to set the load distribution method to dst mac Controller config port channel load balance dst mac Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series OL 32323 01 39 Layer 2 3 Commands port channel load balance ...

Страница 48: ...tional Specifies load distribution based on the destination TCP UDP Layer 4 port number for both IPv4 and IPv6 dst port Optional Specifies load distribution based on the source MAC address and IPv6 flow label ipv6 label Optional Specifies load distribution based on the source MAC address and Layer 3 protocols l3 proto Optional Specifies load distribution based on the source host IP address src ip ...

Страница 49: ...ow running config privileged EXEC command or the show etherchannel load balance privileged EXEC command Examples This example shows how to set the extended load distribution method Controller config port channel load balance extended dst ip dst mac src ip Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series OL 32323 01 41 Layer 2 3 Commands port channel load balance extended ...

Страница 50: ...and up to eight ports can be in hot standby mode When there are more than eight ports in an LACP channel group the controller on the controlling end of the link uses port priorities to determine which ports are bundled into the channel and which ports are put in hot standby mode Port priorities on the other controller the noncontrolling end of the link are ignored The port channel min links comman...

Страница 51: ...ion Command Specifies the maximum number of LACP ports allowed in a port channel lacp max bundle Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series OL 32323 01 43 Layer 2 3 Commands port channel min links ...

Страница 52: ...g used in the channel protocol Optional Displays a one line summary per channel group summary Command Default None Command Modes User EXEC Command History Modification Release This command was introduced Cisco IOS XE 3 2SE Usage Guidelines If you do not specify a channel group number all channel groups are displayed In the output the passive port list field is displayed only for Layer 3 port chann...

Страница 53: ...o of bits 0 00 Gi1 0 1 Active 0 0 00 Gi1 0 2 Active 0 Time since last port bundled 01d 20h 24m 44s Gi1 0 2 This is an example of output from the show etherchannel channel group number summary command Controller show etherchannel 1 summary Flags D down P in port channel I stand alone s suspended H Hot standby LACP only R Layer3 S Layer2 u unsuitable for bundling U in use f failed to allocate aggreg...

Страница 54: ... Channel group listing Group 1 Protocol LACP Group 2 Protocol PAgP Related Commands Description Command Assigns an Ethernet port to an EtherChannel group or enables an EtherChannel mode or both channel group Restricts the protocol used on a port to manage channeling channel protocol Accesses or creates a port channel interface port channel Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco ...

Страница 55: ...mand was introduced Cisco IOS XE 3 2SE Usage Guidelines You can enter any show lacp command to display the active channel group information To display specific channel information enter the show lacp command with a channel group number If you do not specify a channel group information for all channel groups appears You can enter the channel group number to specify a channel group for all keywords ...

Страница 56: ...LACPDUs Pkts and Err This is an example of output from the show lacp internal command Controller show lacp 1 internal Flags S Device is requesting Slow LACPDUs F Device is requesting Fast LACPDUs A Device is in Active mode P Device is in Passive mode Channel group 1 LACP port Admin Oper Port Port Port Flags State Priority Key Key Number State Gi2 0 1 SA bndl 32768 0x3 0x3 0x4 0x3D Gi2 0 2 SA bndl ...

Страница 57: ...ts in standby mode when there is a hardware limitation that prevents all compatible ports from aggregating LACP Port Priority Administrative key assigned to this port LACP automatically generates an administrative key value as a hexadecimal number The administrative key defines the ability of a port to aggregate with other ports A port s ability to aggregate with other ports is determined by the p...

Страница 58: ... Port System ID Port Number Age Flags Gi2 0 1 32768 0007 eb49 5e80 0xC 19s SP LACP Partner Partner Partner Port Priority Oper Key Port State 32768 0x3 0x3C Partner s information Partner Partner Partner Port System ID Port Number Age Flags Gi2 0 2 32768 0007 eb49 5e80 0xD 15s SP LACP Partner Partner Partner Port Priority Oper Key Port State 32768 0x3 0x3C This is an example of output from the show ...

Страница 59: ...clear lacp Configures the port priority for the Link Aggregation Control Protocol LACP lacp port priority Configures the LACP system priority lacp system priority Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series OL 32323 01 51 Layer 2 3 Commands show lacp ...

Страница 60: ...ase This command was introduced Cisco IOS XE 3 2SE Usage Guidelines You can enter any show pagp command to display the active channel group information To display the nonactive information enter the show pagp command with a channel group number Examples This is an example of output from the show pagp 1 counters command Controller show pagp 1 counters Information Flush Port Sent Recv Sent Recv Chan...

Страница 61: ...Interval Count Priority Method Ifindex Gi1 0 1 SC U6 S7 H 30s 1 128 Any 16 Gi1 0 2 SC U6 S7 H 30s 1 128 Any 16 This is an example of output from the show pagp 1 neighbor command Controller show pagp 1 neighbor Flags S Device is sending Slow hello C Device is in Consistent state A Device is in Auto mode P Device learns on physical port Channel group 1 neighbors Partner Partner Partner Partner Group...

Страница 62: ...nation MAC addresses mac src mac dst mac Optional Specifies the source and destination IP addresses ip src ip dst ip Optional Specifies the source and destination layer port numbers port src port dst port Command Default None Command Modes Privileged EXEC Command History Modification Release This command was introduced Cisco IOS XE 3 2SE Usage Guidelines Use this command only when you are working ...

Страница 63: ...Release This command was introduced Cisco IOS XE 3 2SE Usage Guidelines Use this command only when you are working directly with your technical support representative while troubleshooting a problem Do not use this command unless your technical support representative asks you to do so Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series OL 32323 01 55 Layer 2 3 Commands show p...

Страница 64: ...splays UDLD operational status of the internal interface The range is from 0 to 9 InternalInterface Optional Displays UDLD operational status of the loopback interface The range is from 0 to 2147483647 Loopback Optional Displays UDLD operational status of the null interface Null Optional Displays UDLD operational status of the Ethernet channel interfaces The range is from 1 to 128 Port channel Opt...

Страница 65: ...nal state Advertisement Single Neighbor detected Message interval 60 Time out interval 5 Entry 1 Expiration time 146 Device ID 1 Current neighbor state Bidirectional Device name Switch A Port ID Gi2 0 1 Neighbor echo 1 device Switch B Neighbor echo 1 port Gi2 0 2 Message interval 5 CDP Device name Switch A Table 8 show udld Field Descriptions Description Field The interface on the local device con...

Страница 66: ...ry 1 The amount of time in seconds remaining before this cache entry is aged out Expiration time The neighbor device identification Device ID The neighbor s current state If both the local and neighbor devices are running UDLD normally the neighbor state and local state should be bidirectional If the link is down or the neighbor is not UDLD capable no cache entries appear Current neighbor state Th...

Страница 67: ...0 1 Bidirectional Gi3 0 1 Switch A 2 Gi3 0 1 Bidirectional Related Commands Description Command Enables aggressive or normal mode in UDLD or sets the configurable message timer time udld Enables UDLD on an individual interface or prevents a fiber optic interface from being enabled by the udld global configuration command udld port Resets all interfaces shut down by UDLD and permits traffic to pass...

Страница 68: ...t Note Entering the no switchport command shuts the port down and then reenables it which might generate messages on the device to which the port is connected When you put an interface that is in Layer 2 mode into Layer 3 mode or the reverse the previous configuration information related to the affected interface might be lost and the interface is returned to its default configuration If an interf...

Страница 69: ... Controller config if no switchport This example shows how to cause the port interface to cease operating as a Cisco routed port and convert to a Layer 2 switched interface Controller config if switchport Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series OL 32323 01 61 Layer 2 3 Commands switchport ...

Страница 70: ...duced Cisco IOS XE 3 2SE Usage Guidelines The port must be in access mode before the switchport access vlan command can take effect If the switchport mode is set to access vlan vlan id the port operates as a member of the specified VLAN An access port can be assigned to only one VLAN The no switchport access command resets the access mode VLAN to the appropriate default VLAN for the device Example...

Страница 71: ...the port trunking mode dynamic parameter to desirable to specify that the interface actively attempt to convert the link to a trunk link dynamic desirable Sets the port to trunk unconditionally The port is a trunking VLAN Layer 2 interface The port sends and receives encapsulated tagged frames that identify the VLAN of origination A trunk is a point to point link between two controllers or between...

Страница 72: ...frames Access ports and trunk ports are mutually exclusive The IEEE 802 1x feature interacts with switchport modes in these ways If you try to enable IEEE 802 1x on a trunk port an error message appears and IEEE 802 1x is not enabled If you try to change the mode of an IEEE 802 1x enabled port to trunk the port mode is not changed If you try to enable IEEE 802 1x on a port set to dynamic auto or d...

Страница 73: ...ands Description Command Configures a port as a static access port switchport access vlan Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series OL 32323 01 65 Layer 2 3 Commands switchport mode ...

Страница 74: ...o not support DTP might forward DTP frames improperly and cause misconfigurations To avoid this problem turn off DTP by using the switchport nonegotiate command to configure the interfaces connected to devices that do not support DTP to not forward DTP frames When you enter the switchport nonegotiate command DTP negotiation packets are not sent on the interface The device does or does not trunk ac...

Страница 75: ...e id switchport privileged EXEC command Related Commands Description Command Configures the VLAN membership mode of a port switchport mode Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series OL 32323 01 67 Layer 2 3 Commands switchport nonegotiate ...

Страница 76: ...nes UDLD supports two modes of operation normal the default and aggressive In normal mode UDLD detects unidirectional links due to misconnected interfaces on fiber optic connections In aggressive mode UDLD also detects unidirectional links due to one way traffic on fiber optic and twisted pair links and due to misconnected interfaces on fiber optic links For information about normal and aggressive...

Страница 77: ...ver from the UDLD error disabled state Examples This example shows how to enable UDLD on all fiber optic interfaces Controller config udld enable You can verify your setting by entering the show udld privileged EXEC command Related Commands Description Command Displays UDLD administrative and operational status for all ports or the specified port show udld Enables UDLD on an individual interface o...

Страница 78: ...ion normal the default and aggressive In normal mode UDLD detects unidirectional links due to misconnected interfaces on fiber optic connections In aggressive mode UDLD also detects unidirectional links due to one way traffic on fiber optic and twisted pair links and due to misconnected interfaces on fiber optic links To enable UDLD in normal mode use the udld port interface configuration command ...

Страница 79: ...erface gigabitethernet6 0 1 Controller config if udld port This example shows how to disable UDLD on a fiber optic interface despite the setting of the udld global configuration command Controller config interface gigabitethernet6 0 1 Controller config if no udld port You can verify your settings by entering the show running config or the show udld interface privileged EXEC command Related Command...

Страница 80: ...face configuration is still enabled for UDLD these ports begin to run UDLD again and are disabled for the same reason if the problem has not been corrected Examples This example shows how to reset all interfaces disabled by UDLD Controller udld reset 1 ports shutdown by UDLD were reset Related Commands Description Command Displays UDLD administrative and operational status for all ports or the spe...

Страница 81: ...hod command 34 pagp port priority command 36 port channel load balance command 38 port channel load balance extended command 40 port channel min links command 42 S show etherchannel command 44 show lacp command 47 show pagp command 52 show platform etherchannel command 54 show platform pm command 55 show udld command 56 switchport access vlan command 62 switchport command 60 switchport mode comman...

Страница 82: ...Layer 2 3 Command Reference Cisco IOS XE Release 3E Cisco WLC 5700 Series IN 2 OL 32323 01 Index ...

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