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Cisco 819 Series Integrated Services Routers Software Configuration Guide
OL-23590-02
Chapter 10 Configuring the Ethernet Switches
Information About Ethernet Switches
Information About Ethernet Switches
To configure Ethernet switches, you should understand the following concept:
• VLANs and VLAN Trunk Protocol, page 10-2
• Layer 2 Ethernet Switching, page 10-2
• 802.1x Authentication, page 10-2
• Spanning Tree Protocol, page 10-2
• Cisco Discovery Protocol, page 10-2
• Switched Port Analyzer, page 10-3
• IGMP Snooping, page 10-3
• Storm Control, page 10-3
• Fallback Bridging, page 10-3
VLANs and VLAN Trunk Protocol
For information on the concept of VLANs and VLAN Trunk Protocol (VTP), see VLANs.
Layer 2 Ethernet Switching
For information on the concept of Layer 2 Ethernet Switching, see Layer 2 Ethernet Switching.
802.1x Authentication
For information on the concept of 802.1x Authentication, see 802.1x Authentication.
Spanning Tree Protocol
For information on the concept of Spanning Tree Protocol, see Using the Spanning Tree Protocol with
the Cisco EtherSwitch Network Module.
Cisco Discovery Protocol
Cisco Discovery Protocol (CDP) runs over Layer 2 (the data link layer) on all Cisco routers, bridges,
access servers, and switches. CDP allows network management applications to discover Cisco devices
that are neighbors of already known devices, in particular, neighbors running lower-layer, transparent
protocols. With CDP, network management applications can learn the device type and the SNMP agent
address of neighboring devices. This feature enables applications to send SNMP queries to neighboring
devices.