Allied-telesis AT-S100 Manual de usuario Pagina 251
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AT-S100 Management Software User’s Guide
Section II: Advanced Configuration 251
SPANNING-TREE MAX-AGE
Syntax
spanning-tree max-age <6-40>
no spanning-tree max-age
Parameters
none
Description
Use the SPANNING-TREE MAX-AGE command to set the max-age for a
bridge. Max-age is the maximum time, in seconds, for which (if a bridge is
the root bridge) a message is considered valid. This prevents the frames
from looping indefinitely. This value is used by all instances.
Set the value of max-age to greater than twice the value of the hello time
plus one, but less than twice the value of forward delay minus one. The
allowable range for max-age is 6-40 seconds. The default value is 20
seconds.
Configure this value sufficiently high, so that a frame generated by root
can be propagated to the leaf nodes without exceeding the max-age.
Use the no form of this command to restore the default value of max-age.
Command Mode
Configuration Terminal mode
Example
The following commands set the max-age time for the bridge to 10
seconds:
switch#configure terminal
switch(config)#spanning-tree max-age 10
Related Commands
“SPANNING-TREE FORWARD-TIME” on page 249
- User’s Guide 1
- Contents 3
- Document Conventions 12
- Contacting Allied Telesis 14
- Interface 15
- Introducing the Command Modes 16
- Commands used to 17
- Privileged 18
- Executive 18
- Configuration 19
- Terminal Mode 19
- Line Mode 22
- Username:manager 23
- Password: 23
- Formatting Commands 24
- Command Line 25
- Conventions 25
- Chapter 2 27
- Setting the Switch 28
- Setting a 29
- Gateway Address 29
- Setting the 29
- Network Time 29
- Turning on NTP Authentication 30
- Building configuration 31
- Displaying and 32
- Setting MAC 32
- Addresses 32
- Setting the Aging Time 33
- Adding a Static MAC Address 34
- Removing a Static MAC Address 34
- Uploading an 37
- Image File 37
- Copying a Configuration File 39
- Creating a VLAN 41
- Adding Tagged Ports to a VLAN 42
- Setting the Ports 43
- Setting Port 44
- Speed and Duplex 44
- Enabling and 45
- Disabling Ports 45
- Setting MDI and 45
- Security 46
- Locked Mode 47
- Secured Mode 47
- MAC Address Maximum 47
- Creating Static 49
- Enabling 50
- Backpressure 50
- Enabling Flow 50
- Preventing 51
- Broadcast Storms 51
- Configuring Protocols 53
- Enabling Dynamic VLANs 54
- Setting GVRP Registration 54
- Enabling IGMP 55
- Snooping 55
- Configuring 58
- Authentication 58
- Setting Simple 59
- Management 59
- Protocol (SNMP) 59
- Creating an SNMP Contact Name 60
- Creating SNMP Communities 60
- Setting the Secure 62
- Setting STP and 62
- Setting the Max Age 65
- Setting the Forward Time 65
- Setting the Hello Time 65
- Setting the BPDU Filter 66
- Setting the BPDU Guard 66
- 802.1p Class of 67
- Command Modes 69
- 70 Section I: Command Modes 70
- Chapter 3 71
- 72 Section I: Command Modes 72
- CONFIGURE TERMINAL 79
- COPY A.B.C.D 82
- “COPY DEFAULT.CFG” on page 84 83
- “CP” on page 86 83
- “DOWNLOAD TFTP” on page 87 83
- “UPLOAD TFTP” on page 113 83
- COPY DEFAULT.CFG 84
- “COPY A.B.C.D” on page 82 85
- 86 Section I: Command Modes 86
- DOWNLOAD TFTP 87
- 88 Section I: Command Modes 88
- Section I: Command Modes 89 89
- SHOW INTERFACE 90
- SHOW MAC ADDRESS-TABLE 92
- SHOW MAC ADDRESS-TABLE STATIC 100
- Related Commands 101
- SHOW MAC ADDRESS-TABLE VLAN 102
- SHOW RUNNING-CONFIG INTERFACE 104
- SHOW SPANNING-TREE 106
- Section I: Command Modes 107 107
- SHOW STATIC-CHANNEL-GROUP 109
- SHOW USER-PRIORITY 110
- SYSTEM FACTORY-RESET 111
- SYSTEM REBOOT 112
- UPLOAD TFTP 113
- Configuration Terminal Mode 115
- Commands 115
- 116 Section I: Command Modes 116
- “USERNAME” on page 162 116
- CLOCK SUMMER-TIME RECURRING 117
- Description 118
- Command Mode 118
- CLOCK TIMEZONE 119
- CRYPTO KEY GENERATE USERKEY 121
- DOT1X SYSTEM-AUTH-CTRL 123
- ENABLE PASSWORD 124
- ENABLE SECRET 125
- 126 Section I: Command Modes 126
- Section I: Command Modes 127 127
- HOSTNAME 128
- INTERFACE 129
- IP IGMP SNOOPING 131
- IP ROUTE 132
- IP SSH RSA KEYPAIR-NAME 133
- IP SSH VERSION 134
- LINE CONSOLE 135
- LINE VTY 136
- MAC ADDRESS-TABLE AGEING-TIME 138
- Parameters 139
- MLS QOS 143
- NTP AUTHENTICATE 145
- NTP AUTHENTICATION-KEY 146
- NTP SERVER 148
- NTP TRUSTED-KEY 150
- SHOW LIST 151
- SHOW RUNNING-CONFIG 153
- 154 Section I: Command Modes 154
- Section I: Command Modes 155 155
- 156 Section I: Command Modes 156
- 158 Section I: Command Modes 158
- USERNAME 162
- Interface Configuration Mode 163
- Commands” on page 219 164
- CHANNEL-GROUP 165
- DOT1X PORT-CONTROL 166
- Section I: Command Modes 167 167
- FLOW CONTROL BACKPRESSURE 168
- FLOW CONTROL RECEIVE 169
- FLOW CONTROL SEND 170
- IP ADDRESS 171
- IP ADDRESS DHCP 173
- LACP SYSTEM-PRIORITY 174
- Section I: Command Modes 175 175
- MIRROR INTERFACE DIRECTION 176
- 178 Section I: Command Modes 178
- SHUTDOWN 181
- Examples 183
- STATIC-CHANNEL-GROUP 184
- STORM-CONTROL 185
- SWITCHPORT ACCESS VLAN 187
- SWITCHPORT MODE TRUNK 188
- SWITCHPORT TRUNK ALLOWED VLAN 190
- 192 Section I: Command Modes 192
- USER-PRIORITY 193
- 194 Section I: Command Modes 194
- Advanced Configuration 195
- Chapter 6 197
- LOGIN REMOTELOCAL 200
- RADIUS-SERVER HOST 201
- RADIUS-SERVER KEY 202
- SHOW DOT1X 203
- SHOW DOT1X ALL 204
- SHOW DOT1X INTERFACE 207
- GVRP Commands 211
- SET GVRP 212
- SET GVRP APPLICANT 213
- Chapter 7: GVRP Commands 214
- SET GVRP REGISTRATION 215
- SET GVRP TIMER 217
- Port Security Commands 219
- Example 220
- SWITCHPORT PORT-SECURITY MODE 223
- (SNMP) Commands 227
- SNMP-SERVER COMMUNITY 228
- SNMP-SERVER CONTACT 230
- SNMP-SERVER ENABLE 232
- SNMP-SERVER GROUP 233
- SNMP-SERVER HOST 235
- SNMP-SERVER USER 237
- SNMP-SERVER USER REMOTE 239
- SNMP-SERVER VIEW 241
- Spanning Tree Protocol (STP) 243
- SPANNING-TREE ENABLE FORWARD 247
- SPANNING-TREE FORWARD-TIME 249
- SPANNING-TREE HELLO-TIME 250
- SPANNING-TREE MAX-AGE 251
- SPANNING-TREE MODE 252
- SPANNING-TREE PRIORITY 255
- SHOW VLAN ALL 258
- SHOW VLAN BRIEF 260
- SHOW VLAN DYNAMIC 262
- SHOW VLAN STATIC 263
- VLAN ACCESS-MAP 268
- VLAN DATABASE 269
- Numerics 271
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