Cisco Catalyst 4500 Series Configuration Guide

CHAPTER
21-1
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
OL-25340-01
21
Configuring Flex Links and MAC Address-Table
Move Update
Flex Links provide a fast and simplified Layer 2 Link redundancy mechanism. This chapter describes
how to configure Flex Links on the Catalyst 4500 series switch. It also describes how to configure the
MAC address-table move update (MMU) feature, also referred to as the Flex Links bidirectional fast
convergence feature.
The chapter consists of these sections:
• About Flex Links, page 21-1
• Configuring Flex Links, page 21-5
• Monitoring Flex Links and the MAC Address-Table Move Update, page 21-12
Note For complete syntax and usage information for the switch commands used in this chapter, first look at
the Cisco Catalyst 4500 Series Switch Command Reference and related publications at this location:
http://www.cisco.com/en/US/products//hw/switches/ps4324/index.html
If the command is not found in the Catalyst 4500 Series Switch Command Reference, it will be found in
the larger Cisco IOS library. Refer to the Cisco IOS Command Reference and related publications at this
location:
http://www.cisco.com/en/US/products/ps6350/index.html
About Flex Links
This section describes this information:
• Flex Links, page 21-2
• VLAN Flex Links Load Balancing and Support, page 21-2
• Flex Links Failover Actions, page 21-3

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E