Dell PowerSwitch S4128F-ON OS10 Enterprise Edition User Guide Release 10.4.1.0 - Page 236

Usage Information Example The RPVST+ protocol determines the root bridge but you can assign one bridge a lower priority to increase the probability it being the root bridge. A lower priority value increases the probability of the bridge becoming a root bridge. OS10(config)# spanning-tree vlan 10 priority 0 Supported Releases 10.2.0E or later spanning-tree vlan priority (Interface) Sets an interface priority when two bridges compete for position as the root bridge. Syntax spanning-tree vlan vlan-id priority value Parameters value - Enter a priority value in the increments of 16 (0 to 240). Default 128 Command Mode INTERFACE Usage Information Breaks the tie between the two bridges which compete for root bridge. Example OS10(conf-if-eth1/1/4)# spanning-tree vlan 10 priority 16 Supported Releases 10.2.0E or later spanning-tree vlan root Designates a device as primary or secondary root bridge. Syntax Parameters spanning-tree vlan vlan-id root {primary | secondary} • vlan-id - Enter a VLAN ID number (1 to 4093). • root - Designate the bridge as primary or secondary root. • primary - Designate the bridge as primary or root bridge. • secondary - Designate the bridge as secondary or secondary root bridge. Default Command Mode Usage Information Example Not configured CONFIGURATION None OS10(config)# spanning-tree vlan 1 root primary Supported Releases 10.2.0E or later Rapid Spanning-Tree Protocol Rapid Spanning-Tree Protocol (RSTP) is similar to STP, but provides faster convergence and interoperability with devices configured with STP and MSTP. RSTP is disabled by default. All enabled interfaces in L2 mode are automatically added to the RSTP topology. Configuring RSTP is a two-step process: 1 Ensure that the interfaces are in L2 mode. 236 Layer 2