Dell PowerSwitch S4128F-ON OS10 Enterprise Edition User Guide Release 10.4.3.0 - Page 367

Example OS10(config)# spanning-tree rstp max-age 10 Supported Releases 10.2.0E or later spanning-tree rstp Sets the priority value for RSTP. Syntax spanning-tree rspt priority priority value Parameters priority priority value - Enter a bridge-priority value in increments of 4096, from 0 to 61440. Valid priority values are: 0, 4096, 8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864, 40960, 45056, 49152, 53248, 57344, and 61440. All other values are rejected. Default Not configured Command Mode CONFIGURATION Usage Information RSTP determines the root bridge but you can assign one bridge a lower priority to increase the probability of it being the root bridge. A lower priority value increases the probability of the bridge becoming a root bridge. Example OS10(config)# spanning-tree rstp priority 200 Supported Releases 10.2.0E or later Virtual LANs VLANs segment a single flat L2 broadcast domain into multiple logical L2 networks. Each VLAN is uniquely identified by a VLAN ID or tag consisting of 12 bits in the Ethernet frame. VLAN IDs range from 1 to 4093 and provide a total of 4093 logical networks. You can assign ports on a single physical device to one or more VLANs creating multiple logical instances on a single physical device. The virtual logical switches spanning across different physical devices emulate multiple logically segmented L2 networks on a single physical network. Each VLAN has its own broadcast domain. The unicast, multicast, and broadcast network traffic from ports that belong to a VLAN forwards or floods to ports in the same VLAN only. Traffic between VLANs routes from one VLAN to another. You can also assign each VLAN an IP address to group all the ports within a single IP subnet. Segment a L2 network using VLANs to: • Minimize broadcast and multicast traffic in the L2 network • Increase security by isolating ports into different VLANs • Ease network management Default VLAN All interface ports are administratively up in L2 mode and are automatically placed in the default VLAN as untagged interfaces. When you assign a port to a non-default VLAN in Trunk mode, the interface remains an untagged member of the default VLAN and a tagged member of the new VLAN. When you assign a port to a non-default VLAN in Access mode, it removes from the default VLAN and is assigned to the new VLAN as an untagged member of the new VLAN. • VLAN 1 is the default VLAN. • You cannot delete the default VLAN. However, you can change the default VLAN ID number using the default vlan-id command. Use the show vlan command to verify that the interface is part of the default VLAN (VLAN 1). Layer 2 367