Cisco Cisco Catalyst 5000 Supervisor III G Engine Libro bianco

Cisco

© 2012 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.

Page 2 of 55

Contents

Introduction .............................................................................................................................................................. 3

Cisco Catalyst 6500 Series Virtual Switching System: An Overview .................................................................. 3

Cisco Catalyst 6500 Series Virtual Switching System Architecture .................................................................... 3

Virtual Switch Link ................................................................................................................................................... 7

Virtual Switch Link Initialization ............................................................................................................................. 8

Hardware and Software Requirements ................................................................................................................ 10

Virtual Switch Link Redundancy .......................................................................................................................... 13

Multiple Cisco Virtual Switching System Domains ............................................................................................. 15

Cisco EtherChannel Concepts ............................................................................................................................. 16

Multichassis Cisco EtherChannel Links .............................................................................................................. 19

Virtual Switch Mode ............................................................................................................................................... 20

Conversion to Virtual Switch Mode ...................................................................................................................... 21

Operational Management ...................................................................................................................................... 25

Console Management ............................................................................................................................................ 25

Interface Numbering ........................................................................................................................................... 26

File-System Naming............................................................................................................................................... 26

Reloading the Cisco Virtual Switching System and Its Members ..................................................................... 27

High Availability ..................................................................................................................................................... 28

Quad-Sup Uplink Forwarding ............................................................................................................................... 29

Configuration Synchronization ............................................................................................................................ 33

Virtual Switch Priorities and Switch Preemption .................................................................................................. 33

Virtual Switch Priorities ....................................................................................................................................... 33

First Hop Redundancy Protocols ........................................................................................................................ 35

Detection Mechanisms and Configuration........................................................................................................... 41

Action Upon Dual-Active Detection ..................................................................................................................... 45

Quality of Service .................................................................................................................................................. 47

VSL as a Congestion Point ................................................................................................................................. 47

Control Traffic over VSL ...................................................................................................................................... 50

Using Supervisor Engine 720-10G VSS 10 Gigabit Ethernet Uplink Ports as VSL Interfaces ............................ 50

Applying Policies ................................................................................................................................................. 51

Policing ............................................................................................................................................................... 51

Aggregate Policing .............................................................................................................................................. 51

Microflow Policing and User-Based Rate Limiting ............................................................................................... 52

Access Control Lists ........................................................................................................................................... 53

Router ACLs ....................................................................................................................................................... 54

VLAN ACLs ......................................................................................................................................................... 54

Port-Based ACLs ................................................................................................................................................ 55