Reference Guide
Command Mode CONFIGURATION
Usage Information None
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 (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 congured
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 identied 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 dierent 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 trac from ports that belong to a VLAN is
forwarded or ooded to ports in the same VLAN only. Trac 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 trac in the L2 network
• Increase security by isolating ports into dierent 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.
Layer 2
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