Cisco Catalyst 3120 User Manual

CHAPTER
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Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide
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Configuring Fallback Bridging
This chapter describes how to configure fallback bridging (VLAN bridging) on the switch. With fallback
bridging, you can forward non-IP packets that the switch does not route between VLAN bridge domains
and routed ports.
To use this feature, the switch or stack master must be running the IP services feature set. Unless
otherwise noted, the term switch refers to a standalone switch and to a switch stack.
Note For complete syntax and usage information for the commands used in this chapter, see the Cisco IOS
Bridging and IBM Networking Command Reference, Volume 1 of 2, Release 12.2.
This chapter consists of these sections:
• Understanding Fallback Bridging, page 46-1
• Configuring Fallback Bridging, page 46-3
• Monitoring and Maintaining Fallback Bridging, page 46-11
Understanding Fallback Bridging
These sections describe how fallback bridging works:
• Fallback Bridging Overview, page 46-1
• Fallback Bridging and Switch Stacks, page 46-3
Fallback Bridging Overview
With fallback bridging, the switch bridges together two or more VLANs or routed ports, essentially
connecting multiple VLANs within one bridge domain. Fallback bridging forwards traffic that the switch
does not route and forwards traffic belonging to a nonroutable protocol such as DECnet.

Cisco Catalyst 3120 Specifications

General

Brand	Cisco
Model	Catalyst 3120
Category	Switch
Language	English