Reference Guide

Command Mode CONFIGURATION
Usage Information RSTP 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.
Example
OS10(config)# spanning-tree rstp priority 200
Supported Releases 10.2.0E or later
Virtual LANs
VLAN segments a single at L2 broadcast domain into multiple logical L2 networks. Each VLAN is uniquely identied by a VLAN ID or tag
consisting of 12 bits in the Ethernet frame. VLAN IDs range from 1 to 4094 and can provide a total of 4094 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 dierent physical devices emulate multiple logically segmented L2 network on a single physical
network.
Each VLAN has its own broadcast domain and the unicast, multicast, and broadcast network trac from ports that belong to a VLAN is
forwarded or ooded to ports in the same VLAN only. Trac between VLANs must be routed 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 trac in the L2 network
• Increase security by isolating ports into dierent 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 change or delete the default VLAN.
• You cannot assign an IP address to the default VLAN.
Use the show vlan command to verify that the interface is part of the default VLAN (VLAN 1).
Default VLAN conguration
OS10# show vlan
Codes: * - Default VLAN, G-GVRP VLANs, R-Remote Port Mirroring VLANs, P-Primary, C-Community, I-
Isolated
Q: A-Access (Untagged), T-Tagged
x-Dot1x untagged, X-Dot1x tagged
G-GVRP tagged, M-Vlan-stack, H-VSN tagged
i-Internal untagged, I-Internal tagged, v-VLT untagged, V-VLT tagged
NUM Status Description Q Ports
* 1 up A Eth1/1/1-1/1/54
208
Layer 2