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Didn't actually apply to our problem, decided to fix differently
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Didn't actually apply to our problem, decided to fix differently

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A Cisco 888 router at a remote site is currently running with a DSL connection and a fixed IP on the DSL dialup, which is used for multiple VPN connections. In the course of a line upgrade, DSL will be replaced by a carrier ethernet connection, leading to a change in IP due to a transfer network being configured instead of the /32 IP. I can route the old IP to that router, but can not use it as primary IP on the WAN uplink. While I suppose putting it on a loopback interface would make the router reachable from the outside, outgoing VPNs would use the WAN interface's IP instead.<br />
Is there any way to use the loopback IP for the IPSEC connections towards the other VPN locations?
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A Cisco 888 router at a remote site is currently running with a DSL connection and a fixed IP on the DSL dialup, which is used for multiple VPN connections. In the course of a line upgrade, DSL will be replaced by a carrier ethernet connection, leading to a change in IP due to a transfer network being configured instead of the /32 IP. I can route the old IP to that router, but can not use it as primary IP on the WAN uplink. While I suppose putting it on a loopback interface would make the router reachable from the outside, outgoing VPNs would use the WAN interface's IP instead.
Is there any way to use the loopback IP for the IPSEC connections towards the other VPN locations?

Outgoing IP on Cisco Router VPN

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.

Routers

Internet Protocol Security (IPsec) is a protocol suite for secure Internet Protocol (IP) communications by authenticating and encrypting each IP packet of a communication session. IPsec includes protocols for establishing mutual authentication between agents at the beginning of the session and negotiation of cryptographic keys to be used during the session. IPsec can be used in protecting data flows between a pair of hosts (host-to-host), between a pair of security gateways (network-to-network), or between a security gateway and a host (network-to-host). IPsec is an end-to-end security scheme operating in the Internet Layer of the Internet Protocol Suite.