What is a layer 2 vpn

what exactly is one of these ? i have never heard of it, are they all layer 2 ?

Hi
The answer is yes.If u are having a pool of 192.168.1.0/24 and you have a VPN dial-in user having IP 192.168.1.200.He will be able to communicate with the LAN.
Below are some of excerpts from L2TP questionnire.
"Q. What is Layer 3 tunneling?
A. Layer 3 tunneling is not a new technology. Generic Routing Encapsulation (GRE) with RFC 1701 has existed for a long time. Cisco has offered this tunneling technology since Cisco IOS software version 9.21. IPSec is the new IETF standard for encryption and encrypted tunnel. Cisco is providing IPSec in Cisco IOS software version 11.3(3)T and later. Cisco is providing Mobile IP in Cisco IOS version 12.0(1)T.
Q. What is the difference between Layer 2 and Layer 3 tunneling?
A. Layer 2 leverages existing PPP technologies such as NCP and access-authentication protocols. Layer 3 loses much of this by recreating the NCP as Layer 3 tunnel endpoints within the customer network. Layer 2 does not require additional special IP software for end users, corporation, and ISP. The Layer 3 solutions require an IP substrate shared between the Corporation and the ISP. In terms of security, user authentication and tunnel authentication features in Layer two tunneling provide better resistance against hackers. In some Layer 3 solutions, authentication is done only at the SP. This solution may pose a security risk for the corporation. The emerging standard for Layer 2 tunneling protocol is L2TP.
Q. Why is Cisco pushing for Layer 2 tunneling instead of Layer 3 tunneling?
A. Cisco is providing both Layer 2 and Layer 3 tunneling solutions. Cisco does not favor one type over the other. Layer 2 tunneling is primarily an Access VPN solution while Layer 3 tunneling provides support for intranet and extranet VPNs between branch offices and a corporate headquarters. Layer 3 tunneling may also make sense in some of the Access VPN implementations such as client-initiated tunnel mode and Internet wholesale access solutions."
More answers can be found at:
http://www.cisco.com/en/US/tech/tk827/tk369/technologies_q_and_a_item09186a00800a443e.shtml
Regards
JD

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Sorry it took so long but here's the output from sh version.
Location 1
Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-I-M), Version 12.2(16a), RELEASE SOFTWARE (fc2)
Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Fri 18-Apr-03 19:25 by xxxxx
Image text-base: 0x8000808C, data-base: 0x80A0EE84
ROM: System Bootstrap, Version 12.2(10r)1, RELEASE SOFTWARE (fc1)
xxxxxxxxx uptime is 41 weeks, 3 days, 20 hours, 54 minutes
System returned to ROM by power-on
System image file is "flash:c2600-i-mz.122-16a.bin"
cisco 2621 (MPC860) processor (revision 0x00) with 27648K/5120K bytes of memory.
Processor board ID JAD07070EVT (2982455740)
M860 processor: part number 5, mask 2
Bridging software.
X.25 software, Version 3.0.0.
2 FastEthernet/IEEE 802.3 interface(s)
2 Serial network interface(s)
32K bytes of non-volatile configuration memory.
8192K bytes of processor board System flash (Read/Write)
Configuration register is 0x2102
Location 2
Cisco Internetwork Operating System Software
IOS (tm) C1700 Software (C1700-SY-M), Version 12.2(11)T6, RELEASE SOFTWARE (fc1)
TAC Support: http://www.cisco.com/tac
Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Fri 14-Feb-03 14:34 by ccai
Image text-base: 0x80008124, data-base: 0x80A94064
ROM: System Bootstrap, Version 12.2(7r)XM1, RELEASE SOFTWARE (fc1)
xxxxxxxxxxx uptime is 14 weeks, 14 hours, 22 minutes
System returned to ROM by power-on
System image file is "flash:c1700-sy-mz.122-11.T6.bin"
cisco 1721 (MPC860P) processor (revision 0x100) with 44237K/4915K bytes of memory.
Processor board ID FOC0708028N (496857573), with hardware revision 0000
MPC860P processor: part number 5, mask 2
Bridging software.
X.25 software, Version 3.0.0.
1 FastEthernet/IEEE 802.3 interface(s)
1 Serial network interface(s)
WIC T1-DSU
32K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read/Write)
Configuration register is 0x2102
Location 3
Cisco Internetwork Operating System Software
IOS (tm) C1700 Software (C1700-SY-M), Version 12.2(11)T6, RELEASE SOFTWARE (fc1)
TAC Support: http://www.cisco.com/tac
Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Fri 14-Feb-03 14:34 by ccai
Image text-base: 0x80008124, data-base: 0x80A94064
ROM: System Bootstrap, Version 12.2(7r)XM1, RELEASE SOFTWARE (fc1)
Xxxxxxxxx uptime is 13 weeks, 6 days, 5 minutes
System returned to ROM by reload
System image file is "flash:c1700-sy-mz.122-11.T6.bin"
cisco 1721 (MPC860P) processor (revision 0x100) with 44237K/4915K bytes of memory.
Processor board ID FOC0707142M (1927840357), with hardware revision 0000
MPC860P processor: part number 5, mask 2
Bridging software.
X.25 software, Version 3.0.0.
1 FastEthernet/IEEE 802.3 interface(s)
1 Serial network interface(s)
WIC T1-DSU
32K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read/Write)
Configuration register is 0x2102
Location 4
Cisco IOS Software, 2800 Software (C2800NM-ADVSECURITYK9-M), Version 12.4(3g), RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2006 by Cisco Systems, Inc.
Compiled Mon 06-Nov-06 02:36 by alnguyen
ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)
xxxxxxxxxx uptime is 40 weeks, 5 days, 6 hours, 22 minutes
System returned to ROM by reload at 13:34:01 UTC Thu Dec 27 2012
System image file is "flash:c2800nm-advsecurityk9-mz.124-3g.bin"
This product contains cryptographic features and is subject to United States and local country laws governing import, export, transfer and use. Delivery of Cisco cryptographic products does not imply third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for compliance with U.S. and local country laws. By using this product you agree to comply with applicable laws and regulations. If you are unable to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to [email protected].
Cisco 2811 (revision 53.50) with 249856K/12288K bytes of memory.
Processor board ID FTX1051A01V
2 FastEthernet interfaces
2 Serial interfaces
1 Virtual Private Network (VPN) Module
DRAM configuration is 64 bits wide with parity enabled.
239K bytes of non-volatile configuration memory.
62720K bytes of ATA CompactFlash (Read/Write)
Configuration register is 0x2102

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Ask the Expert: Introduction to Cisco Adaptive Security Appliance (ASA) version 9.x (Context Aware Security and VPN Features)

With Namit Agarwal and Rahul Govindan
Welcome to the Cisco Support Community Ask the Expert conversation. This is an opportunity to learn and ask questions about Cisco Adaptive Security Appliance (ASA) version 9.x (Context Aware Security and VPN Features) with experts Namit Agarwal and Rahul Govindan.
This is a continuation of the live webcast.
Cisco ASA CX (Context-Aware) is a next generation firewall service that serves as an extension to the Cisco Adaptive Security Appliance (ASA) firewall platform. In addition to the proven stateful inspection firewall capabilities, it provides us with next-generation capabilities and a host of additional network-based security controls for end-to-end network intelligence and streamlined security operations.
Namit Agarwal is a customer support engineer at the Cisco Technical Assistance Center in Bangalore, India. He has more than four years of experience in the security domain. His areas of expertise include ASA firewalls, IPS, and ASA content-aware security (ASA CX). He has been involved in various escalation requests from around the world. He holds CCIE certification (number 33795) in security.
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Slides from the live webcast
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Hi,
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What is vrflite & what is the pros/cons of the same
Br/Subhojit

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CCIE #37149
Please rate helpful posts.

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this is a bug report for RV082 hardware version 3 and 4, firmware version 1.x, 2.x and 4.x (all latest versions). I hope someone from cisco/belkin reads it.
Summary:
The snmp interface number of a VPN Tunnel change when the VPN tunnel disconnect and then re-connects.
What should happend:
The VPN Tunnel number 1, should always have the same snmp interface number. In RV082 v4, this number should always be 10. For example, the LAN, WAN1 and WAN2 always have the same snmp interface number.
What is the problem:
The VPN Tunnel number 1 change the snmp interface number, from 10, to 11, to 12, etc.
How to reproduce:
create a VPN Tunnel using 2 RV082 or 1 RV082 and 1 RV042. Once the VPN Tunnel is connected write down the snmp interface number. A few days later, disconnect the cable of block internet access. Then restore the internet conection and write down the snmp interface number, you should note that the snmp interface number have changed.
Tools used:
PRTG Network Monitor
Please take a look at the attached image, note all the "ppp" interfaces, theres only 1 VPN Tunnel (gateway-to-gateway) defined.

Hi Tom,
many thanks for your reply.
I see that I have to call Tech-support, in order to report a very technical situation, explaining them this is a bug report and I want them to make a better product.
Since I won't pay a dime for this problem to be fixed, I can only see pain in this path(calling to speak with a tech support representative).
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many thanks for your help,
regards,
Oliver

What is a layer 2 vpn

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