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Cisco 1700 2600 3600 3700 Series VPN Module
White Paper
Cisco Cisco 1700 2600 3600 3700 Series VPN Module White Paper
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© 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
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