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Dell PowerConnect M6220 Command Line Interface Guide - Page 487

Command Mode, User Guidelines, Example, spanning-tree tcnguard, Syntax, Default Configuration

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Command Mode Global Configuration mode User Guidelines The priority value must be a multiple of 4096. The switch with the lowest priority is the root of the spanning tree. Example The following example configures spanning-tree priority to 12288. console(config)#spanning-tree priority 12288 spanning-tree tcnguard Use the spanning-tree tcnguard command to prevent a port from propagating topology change notifications. Use the "no" form of the command to enable TCN propagation. Syntax spanning-tree tcnguard no spanning-tree tcnguard Default Configuration TCN propagation is disabled by default. Command Mode Interface Configuration (Ethernet, Port Channel) mode User Guidelines There are no user guidelines for this command. Example The following example configures spanning-tree tcnguard on 4/g1. console(config-if-4/g1)#spanning-tree tcnguard 487

Section	Page
CLI Reference Guide	1
Command Groups	45
Introduction	45
Command Groups	45
Mode Types	49
Layer 2 Commands	50
AAA	50
ACL	51
Address Table	52
Auto-VoIP	52
CDP Interoperability	53
DHCP l2 Relay	53
DHCP Snooping	54
Dynamic ARP Inspection	54
Ethernet Configuration	55
GVRP	56
IGMP Snooping	57
IGMP Snooping Querier	57
IP Addressing	58
IPv6 ACL	59
IPv6 MLD Snooping	59
IPv6 MLD Snooping Querier	60
LACP	60
Link Dependency	60
LLDP	61
Port Aggregator Commands	62
Port Channel	63
Port Monitor	63
QoS	63
Radius	66
Spanning Tree	68
TACACS+	69
VLAN	70
Voice VLAN	71
802.1X	71
Layer 3 Commands	73
ARP (IPv4)	73
DHCP and BOOTP Relay (IPv4)	73
DHCPv6	74
DVMRP	74
IGMP	75
IGMP Proxy	76
IP Helper	77
IP Routing	77
IPv6 Multicast	78
IPv6 Routing	79
Loopback Interface	82
Multicast	82
OSPF	83
OSPFv3	86
PIM-DM	89
PIM-SM	89
Router Discovery Protocol	90
Routing Information Protocol	91
Tunnel Interface	91
Virtual Router Redundancy	92
Utility Commands	93
Auto Config	93
Captive Portal	93
Clock	95
Configuration and Image Files	95
Denial of Service	96
Line	97
Management ACL	97
Password Management	98
PHY Diagnostics	98
RMON	98
Serviceability Tracing	99
sFlow	100
SNMP	101
SSH	102
Syslog	102
System Management	103
Telnet Server	104
User Interface	105
Web Server	105
Usage Guidelines	106
Using the CLI	107
Introduction	107
Entering and Editing CLI Commands	107
History Buffer	108
Negating Commands	108
Show Command	108
Command Completion	109
Short Form Commands	109
Keyboard Shortcuts	109
Operating on Multiple Objects (Range)	110
Command Scripting	111
CLI Command Notation Conventions	111
Interface Naming Conventions	111
CLI Command Modes	112
User EXEC Mode	113
Privileged EXEC Mode	113
Global Configuration Mode	113
Interface and Other Specific Configuration Modes	113
Identifying the Switch and Command Mode from the System Prompt	115
Navigating CLI Command Modes	115
Starting the CLI	121
Easy Setup Wizard	121
Using CLI Functions and Tools	127
Configuration Management	127
Management Interface Security	129
Management ACL	132
Other CLI Tools and Capabilities	132
Layer 2 Commands	147
Introduction	147
AAA Commands	149
Syntax	150
Default Configuration	150
Command Mode	150
User Guidelines	150
Example	150
aaa authentication enable	150
Syntax	150
Default Configuration	151
Command Mode	151
User Guidelines	151
Example	151
aaa authentication login	152
Syntax	152
Default Configuration	152
Command Mode	152
User Guidelines	153
Example	153
aaa authorization network default radius	153
Syntax	153
Default Configuration	153
Command Mode	153
User Guidelines	153
Example	154
enable authentication	154
Syntax	154
Default Configuration	154
Command Mode	154
User Guidelines	154
Example	154
enable password	154
Syntax	155
Default Configuration	155
Command Mode	155
User Guidelines	155
Example	155
ip http authentication	155
Syntax	155
Default Configuration	156
Command Mode	156
User Guidelines	156
Example	156
ip https authentication	156
Syntax	156
Default Configuration	156
Command Mode	157
User Guidelines	157
Example	157
login authentication	157
Syntax	157
Default Configuration	157
Command Mode	157
User Guidelines	157
Example	157
password (Line Configuration)	158
Syntax	158
Default Configuration	158
Command Mode	158
User Guidelines	158
Example	158
password (User EXEC)	158
Syntax	158
Default Configuration	158
Command Mode	158
User Guidelines	159
Example	159
show authentication methods	159
Syntax	159
Default Configuration	159
Command Mode	159
User Guidelines	159
Example	159
show users accounts	160
Syntax	160
Default Configuration	160
Command Mode	160
User Guidelines	160
Example	160
show users login-history	161
Syntax	161
Default Configuration	161
Command Mode	161
User Guidelines	161
Example	161
username	162
Syntax	162
Default Configuration	162
Command Mode	162
User Guidelines	162
Example	162
ACL Commands	163
Syntax	164
Default Configuration	164
Command Mode	165
User Guidelines	165
Examples	165
deny \| permit	165
Syntax	165
Default Configuration	166
Command Mode	166
User Guidelines	166
Example	166
ip access-group	166
no ip access-group	166
Syntax	166
Default Configuration	167
Command Mode	167
User Guidelines	167
Examples	167
ip access-group <name> out	167
Syntax	167
Default Configuration	167
Command Mode	167
User Guidelines	168
Examples	168
mac access-group	168
Syntax	168
Default Configuration	168
Command Mode	168
User Guidelines	168
Example	169
mac access-list extended	169
Syntax	169
Default Configuration	169
Command Mode	169
User Guidelines	169
Example	169
mac access-list extended rename	170
Syntax	170
Default Configuration	170
Command Mode	170
User Guidelines	170
Example	170
show ip access-lists	170
Syntax	170
Examples	171
show mac access-list	171
Syntax	171
Default Configuration	171
Command Mode	171
User Guidelines	171
Example	171
Address Table Commands	173
Syntax	174
Default Configuration	174
Command Mode	174
User Guidelines	174
Example	174
bridge aging-time	174
Syntax	174
Default Configuration	175
Command Mode	175
User Guidelines	175
Example	175
bridge multicast address	175
Syntax	175
Default Configuration	175
Command Mode	176
User Guidelines	176
Examples	176
bridge multicast filtering	176
Syntax	176
Default Configuration	176
Command Mode	176
User Guidelines	176
Example	177
bridge multicast forbidden address	177
Syntax	177
Default Configuration	177
Command Mode	177
User Guidelines	177
Examples	177
bridge multicast forbidden forward-unregistered	178
Syntax	178
Default Configuration	178
Command Mode	178
User Guidelines	178
Example	178
bridge multicast forward-all	178
Syntax	178
Default Configuration	179
Command Mode	179
User Guidelines	179
Example	179
bridge multicast forward-unregistered	179
Syntax	179
Default Configuration	179
Command Mode	179
User Guidelines	179
Example	179
clear bridge	180
Syntax	180
Default Configuration	180
Command Mode	180
User Guidelines	180
Example	180
port security	180
Syntax	180
Default Configuration	180
Command Mode	181
User Guidelines	181
Example	181
port security max	181
Syntax	181
Default Configuration	181
Command Mode	181
User Guidelines	181
Example	181
show bridge address-table	182
Syntax	182
Default Configuration	182
Command Mode	182
User Guidelines	182
Example	182
show bridge address-table count	182
Syntax	183
Default Configuration	183
Command Mode	183
User Guidelines	183
Example	183
show bridge address-table static	183
Syntax	183
Default Configuration	184
Command Mode	184
User Guidelines	184
Example	184
show bridge multicast address-table	184
Syntax	184
Default Configuration	184
Command Mode	184
User Guidelines	185
Example	185
show bridge multicast filtering	185
Syntax	185
Default Configuration	185
Command Mode	185
User Guidelines	186
Example	186
show ports security	186
Syntax	186
Default Configuration	186
Command Mode	186
User Guidelines	186
Example	186
show ports security addresses	187
Syntax	187
Default Configuration	187
Command Mode	187
User Guidelines	187
Examples	188
Auto-VoIP Commands	189
show switchport voice	189
Syntax	189
Default Configuration	189
Command Mode	189
User Guidelines	189
Example	189
switchport voice detect auto	191
Syntax	191
Default Configuration	191
Command Mode	191
User Guidelines	191
Example	191
CDP Interoperability Commands	193
Syntax	194
Default Configuration	194
Command Mode	194
User Guidelines	194
Example	194
clear isdp table	194
Syntax	194
Default Configuration	194
Command Mode	194
User Guidelines	194
Example	194
isdp advertise-v2	195
Syntax	195
Default Configuration	195
Command Mode	195
User Guidelines	195
Example	195
isdp enable	195
Syntax	195
Default Configuration	195
Command Mode	195
User Guidelines	196
Example	196
isdp holdtime	196
Syntax	196
Default Configuration	196
Command Mode	196
User Guidelines	196
Example	196
isdp timer	196
Syntax	197
Default Configuration	197
Command Mode	197
User Guidelines	197
Example	197
show isdp	197
Syntax	197
Default Configuration	197
Command Mode	197
User Guidelines	197
Example	197
show isdp entry	198
Syntax	198
Default Configuration	198
Command Mode	198
User Guidelines	198
Example	198
show isdp interface	199
Syntax	199
Default Configuration	199
Command Mode	199
User Guidelines	199
Example	199
show isdp neighbors	201
Syntax	201
Default Configuration	201
Command Mode	201
User Guidelines	201
Example	201
show isdp traffic	202
Syntax	202
Default Configuration	202
Command Mode	202
User Guidelines	202
Example	203
DHCP Layer 2 Relay Commands	205
Syntax	206
Default Configuration	206
Command Mode	206
User Guidelines	206
Example	206
dhcp l2relay (Interface Configuration)	206
Syntax	206
Default Configuration	206
Command Mode	206
User Guidelines	206
Example	207
dhcp l2relay circuit-id	207
Syntax	207
Default Configuration	207
Command Mode	207
User Guidelines	207
Example	207
dhcp l2relay remote-id	207
Syntax	207
Default Configuration	208
Command Mode	208
User Guidelines	208
Example	208
dhcp l2relay trust	208
Syntax	208
Default Configuration	208
Configuration Mode	208
User Guidelines	208
Example	208
dhcp l2relay vlan	208
Syntax	209
Default Configuration	209
Command Mode	209
User Guidelines	209
Example	209
DHCP Snooping Commands	211
Syntax	212
Default Configuration	212
Command Mode	212
User Guidelines	212
Example	212
ip dhcp snooping	212
Syntax	212
Default Configuration	212
Command Mode	212
User Guidelines	212
Example	213
ip dhcp snooping binding	213
Syntax	213
Default Configuration	213
Command Mode	213
User Guidelines	213
Example	213
ip dhcp snooping database	213
Syntax	213
Default Configuration	214
Configuration Mode	214
User Guidelines	214
Example	214
ip dhcp snooping database write-delay	214
Syntax	214
Default Configuration	214
Command Mode	214
User Guidelines	215