user manual
Table Of Contents
- Cisco Content Services Switch Routing and Bridging Configuration Guide
- Contents
- Preface
- Configuring Interfaces and Circuits
- Interface and Circuit Overview
- Configuring Interfaces
- Configuring an Interface
- Entering a Description for the Interface
- Configuring Interface Duplex and Speed
- Setting Interface Maximum Idle Time
- Bridging an Interface to a VLAN
- Specifying VLAN Trunking for an Interface
- Configuring Spanning-Tree Bridging for a VLAN or a Trunked Interface
- Configuring Port Fast on an Interface
- Showing Interface Configurations
- Shutting Down an Interface
- Shutting Down All Interfaces
- Restarting an Interface
- Restarting All Interfaces
- Configuring Circuits
- Configuring RIP for an IP Interface
- Configuring the Switched Port Analyzer Feature
- Configuring Spanning-Tree Bridging for the CSS
- CSS Spanning-Tree Bridging Quick Start
- Configuring Spanning-Tree Bridge Aging-Time
- Configuring Spanning-Tree Bridge Forward-Time
- Configuring Spanning-Tree Bridge Hello-Time
- Configuring Spanning-Tree Bridge Max-Age
- Configuring Spanning-Tree Bridge Priority
- Disabling Bridge Spanning-Tree
- Showing Bridge Configurations
- Configuring Open Shortest Path First (OSPF)
- OSPF Overview
- CSS OSPF Configuration Quick Start
- Configuring OSPF on the CSS
- Configuring OSPF on a CSS IP Interface
- Showing OSPF Information
- OSPF Configuration in a Startup-Configuration File
- Configuring the Address Resolution Protocol
- Configuring Routing Information Protocol
- Configuring the Internet Protocol
- IP Configuration Quick Start
- Configuring an IP Route
- Disabling an Implicit Service for the Static Route Next Hop
- Configuring an IP Source Route
- Configuring the IP Record Route
- Configuring Box-to-Box Redundancy
- Configuring IP Equal-Cost Multipath
- Forwarding IP Subnet Broadcast Addressed Frames
- Configuring IP Unconditional Bridging
- Configuring IP Opportunistic Layer 3 Forwarding
- Showing IP Configuration Information
- Configuring the Cisco Discovery Protocol
- Configuring the DHCP Relay Agent
- Index
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Cisco Content Services Switch Routing and Bridging Configuration Guide
OL-4580-01
Chapter 2 Configuring Spanning-Tree Bridging for the CSS
Configuring Spanning-Tree Bridge Priority
To set the bridge maximum age to 21, enter:
(config)# bridge max-age 21
To restore the default maximum age of 6, enter:
(config)# no bridge max-age
Configuring Spanning-Tree Bridge Priority
In spanning tree, the 2-octet field is prepended to the 6-octet MAC address to form
an 8-octet bridge identifier. The device with the lowest bridge identifier is
considered the highest priority bridge and becomes the root bridge. By default, the
bridge priority is set to 32768. Use the bridge priority command to set the
priority that the bridge spanning tree uses to choose the root bridge in the network.
The range for bridge priority is 0 to 65535.
For example:
(config)# bridge priority 1700
To restore the bridge priority to the default of 32768, enter:
(config)# no bridge priority
Disabling Bridge Spanning-Tree
Spanning-tree bridging is enabled by default. When you disable spanning-tree
bridging, the CSS forwards all multicast traffic, including bridge protocol data
units (BPDUs) for the bridge multicast group and for trunked VLANs. The CSS
can still operate in an 802.1Q spanning-tree environment as long as you do not
require that the CSS put any of its ports into a blocking state.
Caution Disabling spanning-tree bridging may make your network susceptible to packet
storms.