Catalyst 4500 Series Switch Cisco IOS Command Reference, 12.2(25)EWA
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Table Of Contents

Symbols - Numerics - A - B - C - D - E - F - G - H - I - J - L - M - N - O - P - Q - R - S - T - U - V -



$ matches the end of a string 1-7

( ) in commands 1-10

* matches 0 or more sequences of a pattern 1-7

+ matches 1 or more sequences of a pattern 1-7

. matches any single character 1-7

? command 1-1

? matches 0 or 1 occurrence of a pattern 1-7

^ matches the beginning of a string 1-7

_ matches a comma (,), left brace ({), left parenthesis 1-7

" 1-10


10-Gigabit Ethernet uplink

selecting 2-107

showing the mode 2-299

802.1Q trunk ports and native VLANs 2-541

802.1Q tunnel ports

configuring 2-500

802.1S Multiple Spanning Tree

see MST

802.1X Port Based Authentication

allowing multiple hosts on a port 2-88

debugging 802.1X Port Based Authentication 2-50

displaying port based authentication 2-285

enabling accounting for authentication sessions 2-3

enabling authentication on the system 2-93

enabling guest VLAN 2-83

enabling guest VLAN supplicant 2-84

enabling manual control of auth state 2-89

enabling periodic re-authentication of the client 2-92

initializing re-authentication of dot1x ports 2-91

initializing state machines 2-85

receive session termination message upon reboot 2-4

setting maximum number for EAP requests 2-87

setting the reauthentication timer 2-94


abbreviating commands

context-sensitive help 1-1

Access Gateway Module

connecting to a module 2-11

connecting to a remote module 2-250

connecting to a specific remote module 2-258


displaying mac interface 2-372

show mode interface 2-261

access groups

IP 2-5

access lists

clearing an access template 2-27

defining ARP 2-10

displaying ARP information 2-264

See also ACLs, MAC ACLs, and VACLs

access maps

applying with VLAN filter 2-542


access-group mode 2-5

determining ACL hardware programming 2-6

displaying mac access-group interface 2-372

using ACL naming conventions for MAC ACLs 2-174

action clause

specifying drop or forward action in a VACL 2-8

addresses, configuring a maximum 2-221


debugging the adjacency table 2-44

disabling the debug facility 2-44

displaying information about the adjacency table 2-262

displaying IPC table entries 2-44

aggregate policer

displaying information 2-407

aging time

displaying MAC address aging time 2-375

MAC address table 2-177


displaying operational status 2-288


description 1-9


description 1-10


access list, displaying detailed information 2-264

defining access-lists 2-10

ARP inspection

enforce certain types of checking 2-124

ARP packet

deny based on DHCP bindings 2-80

permit based on DHCP bindings 2-207


setting username 2-532

using an MD5-type encryption method 2-532

verifying MD5 signature 2-533

verifying the checksum for Flash memory 2-533

authorization state

enabling manual control 2-89

authorization state of a controlled port 2-89

automatic installation

displaying status 2-265

auto-negotiate interface speed

example 2-491


configuring for VoIP 2-12

displaying configuration 2-266


baby giants

displaying the system MTU setting 2-431

setting the maximum Layer 2 payload size 2-517


displaying debugging messages 2-69

displaying spanning tree status 2-423

enabling debugging 2-69


store for DHCP snooping 2-133

BOOT environment variable

displaying information 2-270


displaying information 2-268


debugging spanning tree activities 2-68

bridge protocol data units


broadcast suppression level

configuring 2-492, 2-494

enabling 2-492, 2-494


Catalyst 4507R 2-217

power redundancy mode 2-222


configuring tunneling encapsulation rate 2-170


neighbor information 2-271

enabling protocol tunneling for 2-166

set drop threshold for 2-168


displaying next-hop information 2-332

displaying VLAN configuration information 2-332


macro apply 2-183

Cisco Express Forwarding



macro apply 2-185


macro apply 2-187


macro apply 2-189

clear commands

clearing Gigabit Ethernet interfaces 2-25

clearing IGMP group cache entries 2-32

clearing interface counters 2-22

clearing IP access lists 2-27, 2-28

clearing IP ARP inspection statistics VLAN 2-29

clearing IP DHCP snooping database 2-30

clearing IP DHCP snooping database statistics 2-31

clearing MFIB counters and routes 2-35

clearing MFIB fastdrop entries 2-36

clearing PAgP channel information 2-39

clearing QoS aggregate counters 2-41

clearing VLAN interfaces 2-26

CLI string search

anchoring 1-10

expressions 1-7

filtering 1-6

multiple-character patterns 1-8

multipliers 1-9

parentheses for recall 1-10

searching outputs 1-6

single-character patterns 1-7

using 1-6

command modes

accessing privileged EXEC mode 1-4

exiting 1-4

understanding user EXEC and configuration modes 1-4

condition interface

debugging interface-related activities 2-46

condition vlan

debugging VLAN output 2-49

configuration, saving 1-11


root as secondary 2-475

configuring a SPAN session to monitor

limit SPAN source traffic 2-199

configuring forward delay 2-471

configuring root as primary 2-475


assigning to Layer 2 protocol packets 2-167

CoS QoS default

defining value on an interface 2-235

Cost of Service

See QoS CoS


clearing interface counters 2-22



clear statistics 2-29


displaying qos dbl 2-408

enabling DBL globally on the switch 2-236

debug commands

debugging backup events 2-45

debugging DHCP snooping events 2-55

debugging DHCP snooping messages 2-56

debugging EtherChannel/PAgP/shim 2-51

debugging IPC activity 2-54

debugging IP DHCP snooping security messages 2-57

debugging NVRAM activities 2-60

debugging PAgP activities 2-61

debugging port manager activities 2-64

debugging software MAC filter updates 2-67

debugging spanning tree activities 2-68

debugging spanning tree backbonefast 2-69

debugging spanning tree UplinkFast 2-72

debugging supervisor redundancy 2-66

debugging VLAN manager activities 2-73

displaying monitor activity 2-59

displaying the adjacency table 2-44

enabling debug dot1x 2-50

enabling debugging messages for ISL VLAN IDs 2-75

enabling debugging messages for VTP 2-76

enabling debugging of UDLD activity 2-77

enabling switch shim debugging 2-70

enabling VLAN manager file system error tests 2-74

limiting debugging output for VLANs 2-49

limiting interface debugging output 2-46

limiting output for debugging standby state changes 2-47

shortcut to the debug condition interface 2-53


activity monitoring 2-59

DHCP snooping events 2-55

DHCP snooping packets 2-56

IPC activities 2-54

IP DHCP snooping security packets 2-57

NVRAM activities 2-60

PAgP activities 2-61

PAgP shim 2-51

PM activities 2-64

SMF address insertions and deletions 2-67

spanning tree BackboneFast events 2-69

spanning tree switch shim 2-70

spanning tree UplinkFast events 2-72

VLAN manager activities 2-73

VLAN manager IOS file system error tests 2-74

VTP protocol debug messages 2-76

debug spanning tree switch 2-70

debug sw-vlan vtp 2-76

default CoS value 2-235

default form of a command, using 1-6

defining egress DSCP-to-CoS mapping 2-240


clearing database statistics 2-31

DHCP bindings

configuring bindings 2-132

deny ARP packet based on matches 2-80

permit ARP packet based on matches 2-207

DHCP snooping

clearing database 2-30

displaying binding table 2-334

displaying configuration information 2-333

displaying status of DHCP database 2-337

displaying status of error detection 2-291

enabling DHCP globally 2-131

enabling IP source guard 2-164

enabling on a VLAN 2-139

enabling option 82 2-135, 2-136

enabling rate limiting on an interface 2-137

enabling trust on an interface 2-138

establishing binding configuration 2-132

renew binding database 2-252

store generated bindings 2-133

diagnostic test

displaying attributes 2-275

display module-based results 2-277

displaying error disable recovery 2-292

displaying inline power status 2-402

displaying monitoring activity 2-59

displaying SEEPROM information

GBIC 2-300

displaying SPAN session information 2-430, 2-493

document conventions xvi

document organization xv

DOS attack

protecting system's resources 2-119

drop threshold, Layer 2 protocol tunneling 2-168

DSCP rewrite for IP packets

enable 2-243

dual-capable port

selecting a connector 2-196

duplex mode

configuring autonegotiation on an interface 2-96

configuring full duplex on an interface 2-96

configuring half duplex on an interface 2-96

dynamic ARP inspection

preventing 2-119

Dynamic Buffer Limiting


Dynamic Host Configuration Protocol




restarting authentication process 2-87


debugging for UDLD 2-77

voice VLANs 2-495


alarms 2-288

displaying information 2-288

status 2-288

temperature 2-288

error disable detection

enabling error disable detection 2-98

error-disabled state

displaying 2-318

error disable recovery

configuring recovery mechanism variables 2-100

displaying recovery timer information 2-292

enabling ARP inspection timeout 2-100

specifying recovery cause 2-100


assigning interfaces to EtherChannel groups 2-16

debugging EtherChannel 2-51

debugging PAgP shim 2-51

debugging spanning tree activities 2-68

displaying information for a channel 2-293

removing interfaces from EtherChannel groups 2-16

EtherChannel guard

detecting STP misconfiguration 2-462

Explicit Host Tracking

clearing the database 2-34

enabling per-VLAN 2-151


matching multiple expression occurrences 1-9

multiple-character patterns 1-8

multiplying pattern occurrence 1-10

single-character patterns 1-7

Extensible Authentication Protocol



field replaceable unit (FRU)

displaying status information 2-288

Flash memory file system

displaying file system information 2-268

verifying checksum 2-533

flow control

configuring a gigabit interface for pause frames 2-103

displaying per-interface statistics for flow control 2-297



displaying SEEPROM information 2-300

Gigabit Ethernet interface

clearing the hardware logic 2-25

Gigabit Ethernet uplink

selecting 2-107

showing the mode 2-299

global configuration mode

using 1-5


hardware module

resetting a module by toggling the power 2-106

hardware uplink

selecting the mode 2-107

showing the mode 2-299

helper addresses, IP 2-351

hot standby protocol

debugging 2-47

disabling debugging 2-47

limiting output 2-47



displaying SEEPROM information

chassis 2-300

clock module 2-300

fan trays 2-300

module 2-300

mux buffer 2-300

power supplies 2-300

supervisor engine 2-300

ifIndex persistence

clearing SNMP ifIndex commands 2-451

compress SNMP ifIndex table format 2-456

disabling globally 2-455

disabling on an interface 2-452

enabling globally 2-455

enabling on an interface 2-452


applying filters for host joining on Layer 2 interfaces 2-141

clearing IGMP group cache entries 2-32

configuring frequency for IGMP host-query messages 2-144

creating an IGMP profile 2-143

displaying IGMP interface configuration information 2-339

displaying profiles 2-341

setting maximum group numbers 2-142

IGMP profiles

displaying 2-341

IGMP snooping

clearing the EHT database 2-34

configuring a Layer 2 interface as a group member 2-155

configuring a Layer 2 interface as a multicast router 2-153

configuring a static VLAN interface 2-155

displaying multicast information 2-348

displaying VLAN information 2-342, 2-346, 2-349

enabling 2-146

enabling immediate-leave processing 2-152

enabling on a VLAN 2-150

enabling per-VLAN Explicit Host Tracking 2-151


enabling 2-453

inline power

displaying inline power status 2-402

inspection log

clearing log buffer 2-28


displaying suppressed multicast bytes 2-312

interface capabilities

displaying 2-309

interface configuration mode

summary 1-5

interface link

display cable disconnect time 2-315


configuring dot1q tunnel ports 2-500

creating an interface-range macro 2-79

debugging output of interface related activities 2-46

displaying description 2-314

displaying error-disabled state 2-318

displaying information when tunneling is enabled 2-366

displaying status 2-314

displaying traffic for a specific interface 2-306

entering interface configuration mode 2-111

executing a command on multiple ports in a range 2-114

selecting an interface to configure 2-111

setting a CoS value for Layer 2 packets 2-167

setting drop threshold for Layer 2 packets 2-168

setting the interface type 2-500

interface speed

configuring interface speed 2-489

interface transceiver

displaying diagnostic data 2-321

internal VLAN allocation

configuring 2-543

default setting 2-543

displaying allocation information 2-442

Internet Group Management Protocol



applying ARP ACL to VLAN 2-117

clearing inspection statistics 2-29

clearing status of log buffer 2-28

controlling packet logging 2-127

enabling dynamic inspection 2-126

limit rate of incoming requests 2-119

set per-port config trust state 2-123

showing status of dynamic ARP inspection 2-328

showing status of log buffer 2-331


debugging IPC activities 2-54

IP DHCP Snooping

See DHCP snooping

IP header validation

disabling 2-163

enabling 2-163

IP interfaces

displaying usability status 2-350

IP multicast

displaying multicast routing table information 2-356

IP packets

enable DSCP rewrite 2-243

IP phone and standard desktop

enabling Cisco-recommended features 2-185

IP source binding

adding or deleting 2-160

displaying bindingstagging 2-361

IP source guard

debugging messages 2-57

displaying configuration and filters 2-362

enabling on DHCP snooping 2-164


Jumbo frames

enabling jumbo frames 2-203



deselecting channeling protocol 2-18

enabling LACP on an interface 2-18

setting channeling protocol 2-18

Layer 2

displaying ACL configuration 2-372

Layer 2 interface type

specifying a nontrunking, nontagged single VLAN interface 2-500

specifying a trunking VLAN interface 2-500

Layer 2 protocol ports

displaying 2-366

Layer 2 protocol tunneling error recovery 2-170

Layer 2 switching

enabling voice VLANs 2-495

modifying switching characteristics 2-495

Layer 2 traceroute

IP addresses 2-521

Layer 3 switching

displaying information about an adjacency table 2-262

displaying port status 2-319

displaying status of native VLAN tagging 2-319

log buffer

show status 2-331


controlling IP ARP packets 2-127


MAC Access Control Lists



defining extended MAC access list 2-174

displaying MAC ACL information 2-439

naming an ACL 2-174

MAC address filtering

configuring 2-181

disabling 2-181

enabling 2-181

MAC address table

adding static entries 2-191

clearing dynamic entries 2-38

configuring aging time 2-177

displaying dynamic table entry information 2-377

displaying entry count 2-376

displaying information 2-373

displaying interface-based information 2-379

displaying multicast information 2-381

displaying protocol-based information 2-383

displaying static table entry information 2-385

displaying the MAC address aging time 2-375

displaying VLAN-based information 2-387

learning in the protocol buckets 2-178

removing static entries 2-191

MAC address tables

adding static entries 2-181

deleting secure or specific addresses 2-40

disabling IGMP snooping on static MAC addresses 2-181

removing static entries 2-181

mac-address-table static 2-181

MAC address unicast filtering

dropping unicast traffic 2-181

macro keywords

help strings 2-2

mapping secondary VLANs to MST instance 2-227

mapping VLAN(s) to an MST instance 2-109

match subcommand

accessing 2-20

maximum transmission unit (MTU)

displaying the system MTU setting 2-431

setting the maximum Layer 2 payload size 2-517


verifying MD5 signature 2-533

message digest 5

See MD5


clearing ip mfib counters 2-35

clearing ip mfib fastdrop 2-36

displaying all active MFIB routes 2-353

displaying MFIB fastdrop table entries 2-355

enabling IP MFIB fastdrops 2-157


access-group 2-5

show access-group interface 2-261

switching between PVST+, MST, and Rapid PVST 2-467

See also command modes

module password clearing 2-24

module reset

resetting a module by toggling the power 2-106

--More-- prompt

filter 1-6

search 1-7


designating the primary and secondary root 2-475

displaying MST protocol information 2-427

displaying region configuration information 2-427

displaying spanning tree information 2-427

entering MST configuration submode 2-469

setting configuration revision number 2-254

setting path cost and port priority for instances 2-468

setting the forward delay timer for all instances 2-471

setting the hello-time delay timer for all instances 2-472

setting the max-age timer for all instances 2-473

setting the MST region name 2-204

specifying the maximum number of hops 2-474

switching between PVST+ and Rapid PVST 2-467

using the MST configuration submode revision command 2-254

using the submode name command 2-204


displaying global MTU settings 2-431


enabling storm control 2-494

multicast/unicast packets

prevent forwarding 2-499

Multicast Forwarding Information Base


multiple-character patterns 1-8

multiple hosts on authorized port 2-88

Multiple Spanning Tree



native VLAN

controlling tagging of traffic 2-513

displaying ports eligible for native tagging 2-441

displaying ports eligible for tagging 2-441

enabling tagging on 802.1Q trunk ports 2-541

specifing the tagging of traffic 2-514


enabling NetFlow statistics 2-158

including infer fields in routing statistics 2-158


displaying CEF VLAN information 2-332

no form of a command, using 1-6


debugging NVRAM activities 2-60



pattern searches 1-7


packet forwarding

prevent unknown packets 2-499

packet memory failure

direct switch action upon detection 2-82

packet memory test

bootup, displaying results 2-281

ongoing, displaying results 2-283


access-group mode 2-5

paging prompt

see --More-- prompt


clearing port channel information 2-39

debugging PAgP activity 2-61

deselecting channeling protocol 2-18

displaying port channel information 2-393

hot standby mode

returning to defaults 2-206

selecting ports 2-206

input interface of incoming packets

learning 2-205

returning to defaults 2-205

setting channeling protocol 2-18

parentheses 1-10


clearing on an intelligent line module 2-24

establishing enhanced password security 2-532

setting username 2-532


displaying route maps xvi

redistributing route maps xvi

PM activities

debugging 2-64

disabling debugging 2-64

Policy Based Routing


port, dual-capable

selecting the connector 2-196

Port Aggregation Protocol

See PAgP

port-based authentication

displaying debug messages 2-50

displaying statistics and status 2-285

enabling 802.1X 2-89

manual control of authorization state 2-89

multiple hosts on authorized port 2-88

periodic re-authentication

enabling 2-92

re-authenticating 802.1X-enabled ports 2-91

switch-to-client frame-retransmission number 2-87

port channel

accessing 2-113

creating 2-113

displaying information 2-393

load distribution method

resetting to defaults 2-211

setting 2-211

port range

executing 2-114

port security

debugging ports security 2-65

deleting secure or specific addresses 2-40

displaying settings for an interface or switch 2-399

enabling 2-502

filter source IP and MAC addresses 2-164

setting action upon security violation 2-502

setting the rate limit for bad packets 2-502

sticky port 2-502

Port Trust Device

displaying 2-409

power status

displaying inline power 2-402

displaying power status 2-402

power supply

configuring combined and redundant power on the Catalyst 4507R 2-217

configuring inline power 2-214

configuring power consumption 2-216

configuring power redundancy on the Catalyst 4507R 2-222

displaying the SEEPROM 2-300

setting inline power state 2-213

Private VLAN


privileged EXEC mode, summary 1-5


system 1-5

protocol tunneling

configuring encapsulation rate 2-170

disabling 2-166

displaying port information 2-366

enabling 2-166

setting a CoS value for Layer 2 packets 2-167

setting a drop threshold for Layer 2 packets 2-168


configuring isolated, primary, and community PVLANs 2-223

controlling tagging of native VLAN traffic 2-513

disabling sticky-ARP 2-161

displaying map information for VLAN SVIs 2-317

displaying PVLAN information 2-444

enabling interface configuration mode 2-500

enabling sticky-ARP 2-161

mapping VLANs to the same SVI 2-225

specifying host ports 2-500

specifying promiscuous ports 2-500


switching between PVST and MST 2-467



account Layer 2 encapsulation 2-230

attaching a policy-map to an interface 2-255

automatic configuration 2-12

clearing aggregate counters 2-41

configuring a QoS policy map 2-209

configuring auto 2-12

defining a named aggregate policer 2-232

defining default CoS value 2-235

defining ingress CoS-to-DSCP mapping 2-239

displaying aggregate policer information 2-407

displaying auto configuration 2-266

displaying class maps information 2-274

displaying configuration information 2-266

displaying configurations of policies 2-396

displaying policy map information 2-395, 2-398

displaying QoS information 2-406

displaying QoS map information 2-410

enabling global configuration mode 2-228

enabling per-VLAN QoS for a Layer 2 interface 2-246

enabling QoS on an interface 2-229

mapping DSCP values to transmit queues 2-240

mapping egress DSCP-to-CoS 2-240

mapping the DSCP-to-CoS value 2-240

setting the mapping of policed DSCP values 2-242

setting the trust state 2-244

specifying flow-based match criteria 2-193


configuring for tunneled Layer 2 protocol packets 2-167

defining default CoS value 2-235

qos dbl 2-236

question command 1-1

queueing information

displaying 2-409


Rapid PVST

switching between PVST and MST 2-467

re-authenticating 802.1X-enabled ports 2-91


periodic 2-92

set the time 2-94


restoring bindings across 2-132


accessing the main CPU 2-247

changing from active to standby supervisor engine 2-248

displaying information 2-412

displaying redundancy facility information 2-412

displaying RF client list 2-412

displaying RF operational counters 2-412

displaying RF states 2-412

enabling automatic synchronization 2-15

forcing switchover to standby supervisor engine 2-248

set the mode 2-197

synchronizing the route processor configurations 2-191

related documentation xv

remote SPAN


renew commands

ip dhcp snooping database 2-252

resetting PVLAN trunk

setting switchport to trunk 2-500

rj45 connector, selecting the connector 2-196

ROM monitor mode

summary 1-6

Route Processor Redundancy

See redundancy


set the redundancy mode 2-197


converting VLAN to RSPAN VLAN 2-251

displaying list 2-446


saving configuration changes 1-11

secure address, configuring 2-219

secure ports, limitations 2-503

set the redundancy mode 2-197

sfp connector, selecting the connector 2-196

show commands

filtering parameters 1-7

searching and filtering 1-6

show platform commands 1-11

Simple Network Management Protocol


single-character patterns

special characters 1-7


displaying information on the standby supervisor 2-419


displaying information about the system 2-421


debugging address insertions and deletions 2-67


debugging spanning tree activities 2-68

ifIndex persistence

clearing SNMP ifIndex commands 2-451

compress SNMP ifIndex table format 2-456

disabling globally 2-455

disabling on an interface 2-452

enabling globally 2-455

enabling on an interface 2-452


disabling 2-453

enabling 2-453


configuring to send when storm occurs 2-492

disabling 2-453

enabling 2-453

software MAC filter


SPAN commands

configuring a SPAN session to monitor 2-199

displaying SPAN session information 2-430, 2-493

SPAN enhancements

displaying status 2-391

Spanning Tree Protocol


SPAN session

displaying session information 2-391

filter ACLs 2-199

specify encap type 2-199

turn off host learning based on ingress packets 2-199

special characters

anchoring, table 1-10

SSO 2-197

standard desktop

enabling Cisco-recommended features 2-183

standard desktop and Cisco IP phone

enabling Cisco-recommended features 2-185

sticky address, configuring 2-220


disabling on PVLANs 2-161

enabling on PVLANs 2-161

sticky port

deleting 2-40

enabling security 2-502

storm control

configuring for action when storm occurs 2-492

disabling suppression mode 2-291

displaying settings 2-429

enabling 2-492

enabling broadcast 2-492, 2-494

enabling multicast 2-492, 2-494

enabling suppression mode 2-291

enabling timer to recover from error disable 2-100

enabling unicast 2-492, 2-494

multicast, enabling 2-494

setting high and low levels 2-492

setting suppression level 2-291


configuring link type for a port 2-465

configuring tunneling encapsulation rate 2-170

debugging all activities 2-68

debugging spanning tree activities 2-68

debugging spanning tree BackboneFast events 2-69

debugging spanning tree UplinkFast 2-72

detecting misconfiguration 2-462

displaying active interfaces only 2-423

displaying BackboneFast status 2-423

displaying bridge status and configuration 2-423

displaying spanning tree debug messages 2-68

displaying summary of interface information 2-423

enabling BPDU filtering by default on all PortFast ports 2-480

enabling BPDU filtering on an interface 2-458

enabling BPDU guard by default on all PortFast ports 2-482

enabling BPDU guard on an interface 2-460

enabling extended system ID 2-463

enabling loop guard as a default on all ports 2-466

enabling PortFast by default on all access ports 2-483

enabling PortFast mode 2-478

enabling protocol tunneling for 2-166

enabling root guard 2-464

enabling spanning tree BackboneFast 2-457

enabling spanning tree on a per VLAN basis 2-487

enabling spanning tree UplinkFast 2-485

setting an interface priority 2-484

setting drop threshold for 2-168

setting pathcost 2-461

setting the default pathcost calculation method 2-477

subinterface configuration mode, summary 1-6


creating a Layer 3 interface on a VLAN 2-116

switchport 2-514

switchport interfaces

displaying status of Layer 3 port 2-319

displaying status of native VLAN tagging 2-319

switch shim

debugging 2-70

disabling debugging 2-70

switch to router connection

enabling Cisco-recommended features 2-187

switch to switch connection

enabling Cisco-recommended features 2-189

switch virtual interface


sw-vlan 2-73

system prompts 1-5


Tab key

command completion 1-1


characters with special meaning 1-7

mac access-list extended subcommands 2-174

match syntax description 2-21

multipliers 1-9

relationship between duplex and speed commands 2-490

show cdp neighbors detail field descriptions 2-273

show cdp neighbors field descriptions 2-272

show ip interface field descriptions 2-351

show vlan command output fields 2-445

show vtp command output fields 2-449

special characters 1-9

special characters used for anchoring 1-10

speed command options 2-193, 2-490

valid interface types 2-111


displaying information useful to TAC 2-432\


debugging spanning tree activities 2-68

temperature readings

displaying information 2-288

timer information 2-292

traffic shaping

enable on an interface 2-259

traps, enabling 2-453

trunk encapsulation

setting format 2-514

trunk interfaces

displaying trunk interfaces information 2-326

trust state

setting 2-123

tunnel ports

displaying information about Layer 2 protocol 2-366

TX queues

allocating bandwidth 2-524

returning to default values 2-524

setting priority to high 2-524

specifying burst size 2-524

specifying traffic rate 2-524



displaying administrative and operational status 2-434

enabling by default on all fiber interfaces 2-526

enabling on an individual interface 2-528

preventing a fiber interface from being enabled 2-528

resetting all shutdown ports 2-530

setting the message timer 2-526

Unidirectional Link Detection


unknown multicast traffic, preventing 2-499

unknown unicast traffic, preventing 2-499

user EXEC mode, summary 1-5


setting password and privilege level 2-532



access-group mode 2-5

applying VLAN access maps 2-542

displaying VLAN access map information 2-439

specifying an action in a VLAN access map 2-8

specifying the match clause for a VLAN access-map sequence 2-192

using a VLAN filter 2-542


applying an ARP ACL 2-117

configuring 2-535

converting to RSPAN VLAN 2-251

displaying CEF information 2-332

displaying CEF next-hop information 2-332

displaying information on switch interfaces 2-342, 2-346

displaying information on VLAN switch interfaces 2-349

displaying information sorted by group IP address 2-342, 2-346

displaying IP address and version information 2-342, 2-346

displaying Layer 2 VLAN information 2-436

displaying statistical information 2-389

displaying VLAN information 2-438

enabling dynamic ARP inspection 2-126

enabling Explicit Host Tracking 2-151

enabling guest per-port 2-83

enabling guest VLAN supplicant 2-84

entering VLAN configuration mode 2-539

native frames

enabling tagging on all 802.1Q trunk ports 2-541

pruning the list for VTP 2-514

setting the list of allowed 2-514

VLAN Access Control Lists


VLAN access map


VLAN database

resetting 2-253

VLAN debugging

limiting output 2-49

VLAN manager

debugging 2-73

disabling debugging 2-73

IOS file system error tests

debugging 2-74

disabling debugging 2-74

VLAN Query Protocol


VLAN query protocol (VQPC)

debugging 2-78



counters 2-42

clearing hardware logic 2-26


internal allocation scheme 2-543


internal VLAN allocation information 2-442


entering VLAN configuration mode 2-539


configuring servers 2-547

reconfirming dynamic VLAN assignments 2-545

voice VLANs

enabling 2-495


configuring auto-QoS 2-12


per-server retry count 2-546

reconfirming dynamic VLAN assignments 2-545


configuring the administrative domain name 2-551

configuring the device in VTP client mode 2-550

configuring the device in VTP server mode 2-554

configuring the device in VTP transparent mode 2-555

configuring tunnel encapsulation rate 2-170

creating a VTP domain password 2-552

displaying domain information 2-448

displaying statistics information 2-448

enabling protocol tunneling for 2-166

enabling pruning in the VLAN database 2-553

enabling VTP version 2 mode 2-556

modifying the VTP configuration storage file name 2-549

set drop threshold for 2-168

VTP protocol code

activating debug messages 2-76

deactivating debug messages 2-76