I am configuring L2TP (without IPSec) tunneling between CISCO 850 router (acting as LNS) and Windows XP (acting as LAC). I want to allow full access to internal network (including layer 2 packets)to clients connecting through L2TP tunnel. I created Virtual-Template and unnumbered its ip to Vlan interface, that include all switching ports (FE0-FE3). So all clients reside in single subnet, I use the same DHCP pool and I don't need to do any routing. The problem is that when none devices are connected to these FE0-FE3, Vlan1 interface has state DOWN and as I suspect because of that clients, that are connected through L2TP cannot ping or access router in any other way. When I connect to Vlan1 single device, everything is working fine. How to fix it?? Pleae help.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...