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Hi,<br />
<br />
Please refer this guide howto do L2L vpn:<br />
<br />
<a href="http://www.networkstraining.com/lan-to-lan-ipsec-vpn-between-two-cisco-routers/" rel="ugc">http://www.networkstraining.com/lan-to-lan-ipsec-vpn-between-two-cisco-routers/</a><br />
<br />
If you want to use same subnet on booth sides please configure L2TPv3:<br />
<a href="http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s23/l2tpv3.htm" rel="ugc">http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s23/l2tpv3.htm</a><br />
<br />
Best regards,<br />
Istvan
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Hi,

Please refer this guide howto do L2L vpn:

http://www.networkstraining.com/lan-to-lan-ipsec-vpn-between-two-cisco-routers/ [http://www.networkstraining.com/lan-to-lan-ipsec-vpn-between-two-cisco-routers/]

If you want to use same subnet on booth sides please configure L2TPv3:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s23/l2tpv3.htm [http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s23/l2tpv3.htm]

Best regards,
Istvan

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I have 2 separate sites, both with Cisco 1801 Routers. <br />
<br />
I need to set up a site to site VPN between the 2 sites.<br />
<br />
Do both ends of the VPN need to be on separate subnets? I assume yes do prevent clashes.<br />
<br />
Does anyone have any sites or guides that can help me?
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I have 2 separate sites, both with Cisco 1801 Routers. 

I need to set up a site to site VPN between the 2 sites.

Do both ends of the VPN need to be on separate subnets? I assume yes do prevent clashes.

Does anyone have any sites or guides that can help me?

I need to set up a site-to-site VPN on 2 Cisco 1801 routers. Does anyone have a good step-by-step guide that I can use?

A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or travelling users access to a central organizational network securely. VPNs encapsulate data transfers using secure cryptographic methods and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted.

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.