Cisco 4510R - Catalyst Switch Manual de usuario descargar pdf (Pagina 20)

Port−Channel

EtherChannel features provide redundancy between switches, switch to router, or switch to server connection

by bundling up to eight links. If one of the links fails within the channel, the communication between the

devices is maintained through the links that remain. You can bundle FastEthernet or GE ports. EtherChannel

provides higher bandwidth connections as well. For example, eight port Gigabit EtherChannel (GEC)

provides up to 8 GB full−duplex bandwidth between the switches.

These diagrams show how EtherChannel protects against link failures and still maintains connectivity

between the devices.

Catalyst 4500 Supervisor IV supports PAgP and LACP (since 12.1(13)EW) EtherChannel protocols. LACP,

which is 803.2ad, is an IEEE standard that allows channeling between Catalyst 4500s with other vendor

devices. PAgP is used for channeling between Cisco devices. The supervisor also supports Layer 2 as well as

Layer 3 EtherChannel configurations. Refer to Understanding and Configuring EtherChannel for more

information.

Summary

Catalyst 4500s with Supervisor IV provide many features that enhance the availability of these switches in

networks. They provide redundancy for supervisors, uplinks, and power supplies. They also support

redundancy features, such as HSRP and port−channel. This document discussed some of the caveats or

limitation of these features. The Catalyst 4500 is an evolving platform and many of the features will be

enhanced in future software and hardware releases.

Related Information

Configuring Supervisor Engine Redundancy on the Catalyst 4507R•

Environmental Monitoring and Power Management on Catalyst 4500•

Understanding and Troubleshooting HSRP Problems in Catalyst Switch Networks•

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Cisco 4510R - Catalyst Switch Manual de usuario Pagina 20