Fragmentation Problems | Troubleshooting Router Connections

Table of contents:

Summary

Summary

This chapter showed you the basics of troubleshooting IPsec VPNs on Cisco routers. It is by no means an all-encompassing coverage of troubleshooting VPN problems; however, I've tried to discuss some of the most common problems you'll experience and how to pinpoint those problems using show and debug commands on Cisco routers.

Next up is Part IV, "PIX Firewalls," where I show you how to set up VPN features on Cisco PIX and ASA appliances.

Part I: VPNs

Overview of VPNs

VPN Technologies

IPsec

PPTP and L2TP

SSL VPNs

Part II: Concentrators

Concentrator Product Information

Concentrator Remote Access Connections with IPsec

Concentrator Remote Access Connections with PPTP, L2TP, and WebVPN

Concentrator Site-to-Site Connections

Concentrator Management

Verifying and Troubleshooting Concentrator Connections

Part III: Clients

Cisco VPN Software Client

Windows Software Client

3002 Hardware Client

Part IV: IOS Routers

Router Product Information

Router ISAKMP/IKE Phase 1 Connectivity

Router Site-to-Site Connections

Router Remote Access Connections

Troubleshooting Router Connections

Part V: PIX Firewalls

PIX and ASA Product Information

PIX and ASA Site-to-Site Connections

PIX and ASA Remote Access Connections

Troubleshooting PIX and ASA Connections

Part VI: Case Study

Case Study

Index