Users Guide

spanning-tree rstp max-age
Congures the time period the bridge maintains conguration information before refreshing the information by recomputing the RSTP
topology.
Syntax
max-age seconds
Parameters seconds — Enter a maximum age value in seconds (6 to 40).
Default 20 seconds
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 congured
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
VLANs segment 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 4093 and can 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 dierent physical devices emulate multiple logically segmented L2 networks 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
Layer 2
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