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Troubleshooting VPNs By Mark Lewis More Information VPNs are complex, so when things go wrong, they can be difficult to troubleshoot. What are your options?
The TCP/IP Guide Welcome to the free online version of The TCP/IP Guide! My name is Charles and I am the author and publisher. I hope you will find the material here useful to you in your studies of computing, networking, and programming. Here are a few tips, links and reminders to help you out: Introduction: Newcomers to The TCP/IP Guide may wish to read the Introduction and Guide to the Guide , which will explain what the Guide is about and provide you with useful information about how to use it.
More Information CCIE Practical Studies, Volume II, picks up where CCIE Practical Studies, Volume I, left off. CCIE Practical Studies, Volume I, focuses on modeling complex internetwork scenarios from ISO Layer 1 on up. It covers physical access, modeling LAN and WAN data-link protocols such as Frame Relay, HDLC, PPP, ATM, Ethernet, and Token Ring. CCIE Practical Studies, Volume I, details Cisco Catalyst platforms, including the Token Ring Catalyst 3924 and the Catalyst 35xx/5500/6500 family. Volume II continues with the Catalyst family of switches, focusing on the powerful new Catalyst 3550 intelligent Ethernet switch.
A comment by Brad Hedlund has sent me studying the differences between TRILL and 802.1aq and one of the first articles I’ve stumbled upon was a nice overview which claimed that the protocols are very similar (as they both use IS-IS to select shortest path across the network). After studying whatever sparse information there is on 802.1aq (you might want to read Greg Ferro’s fascination with IEEE paywall ) and the obligatory headache , I’ve figured out that the two proposals have completely different forwarding paradigms. To claim they’re similar is the same as saying DECnet phase V and MPLS Traffic Engineering are similar because they both use IS-IS. TRILL forwarding
by Boštjan Šuštar Cisco IOS - IPsec Solutions A series of articles will cover solutions using the following major implementation options with Cisco IOS routers: Static and Dynamic Crypto Maps Point-to-Point GRE T unnels over IPsec Static and Dynamic Virtual Tunnel Interfaces (VTIs)
From DocWiki Creating a PDF of the Internetworking Technology Handbook Create a PDF of the Internetworking Technology Handbook that you can save on your computer and print. Internetworking Basics An internetwork is a collection of individual networks, connected by intermediate networking devices, that functions as a single large network.
Since 1993 the Dynamic Host Configuration Protocol (DHCP)  has allowed systems to obtain an IPv4 address as well as other information such as the default router or Domain Name System (DNS) server. A similar protocol called DHCPv6  has been published for IPv6, the next version of the IP protocol. However, IPv6 also has a stateless autoconfiguration protocol , which has no equivalent in IPv4. DHCP and DHCPv6 are known as stateful protocols because they maintain tables within dedicated servers. However, the stateless autoconfiguration protocol does not need any server or relay because there is no state to maintain. This article explains the IPv6 stateless autoconfiguration mechanism and depicts its different phases.