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Spanning-Tree Commands
Page 321
spanning-tree guard root
The
spanning-tree guard root
Interface Configuration (Ethernet, port-channel) mode command enables root
guard on all spanning tree instances on the interface. Root guard prevents the interface from becoming the root
port of the device. To disable root guard on the interface, use the
no
form of this command.
Syntax
spanning-tree guard root
no spanning-tree guard root
Default Configuration
Root guard is disabled.
Command Mode
Interface Configuration (Ethernet, port-channel) mode
User Guidelines
Root guard can be enabled when the device operates in STP, RSTP and MSTP.
When root guard is enabled, the port changes to the alternate state if spanning-tree calculations selects the port
as the root port.
Examples
The following example prevents Ethernet port 1/1 from being the root port of the device.
Console(config) #
interface ethernet
1/1
Console(config-mst) #
spanning-tree guard root
Summary of Contents for DXS-3250 - xStack Switch - Stackable
Page 12: ...Page 11 ...
Page 46: ...ACL Commands Page 45 ...
Page 68: ...Address Table Commands Page 67 ...
Page 124: ...Ethernet Configuration Commands Page 123 ...
Page 134: ...GVRP Commands Page 133 ...
Page 144: ...IGMP Snooping Commands Page 143 ...
Page 158: ...IP Addressing Commands Page 157 Console config ip helper address 172 16 9 9 49 53 ...
Page 166: ...IP Addressing Commands Page 165 ...
Page 186: ...Line Commands Page 185 ...
Page 194: ...Management ACL Commands Page 193 ...
Page 200: ...PHY Diagnostics Commands Page 199 ...
Page 208: ...Port Monitor Commands Page 207 ...
Page 216: ...Power over Ethernet Commands Page 215 ...
Page 272: ...RMON Commands Page 271 ...
Page 334: ...Spanning Tree Commands Page 333 ...
Page 428: ...VLAN Commands Page 427 ...
Page 466: ...802 1x Commands Page 465 ...