togethertaya.blogg.se - Ipsec on an edgeview

Hq-router(config)#crypto isakmp key admin123 address 200.200.200.2īranch(config)#crypto isakmp key admin123 addīranch(config)#crypto isakmp key admin123 address 209.165.201.17 Hq-router(config)#crypto isakmp key admin123 add Next, we are going to configure the pre-shared keys on both routers. On the Branch router, we shall do the same: branch(config)#īranch(config-isakmp)#authentication pre-share Hq-router(config-isakmp)#authentication pre-share

Hq-router(config-isakmp)#authentication pre Hq-router(config-isakmp)#authentication pres Hq-router(config-isakmp)#encryption aes 256 Hq-router(config)#crypto isakmp policy 20 On the HQ Router, the configuration is as below: hq-router(config)#crypto isakmp po In this lab we are going to configure a static IPsec SVTI to provide an always on site-to-site VPN. Reference: IPSec Virtual Tunnel Interface – Cisco Systems

ISAKMP policy configuration and pre-shared key configured.

Like site-to-site VPNs using crypto maps and GRE over IPsec using crypto maps, IPsec VTI also requires the following: The transform set is configured with the mode tunnel command. The tunnel interface is configured with the tunnel mode ipsec command. The steps to enable IPsec VTI are very similar to GRE over IPsec except: The DVTI technology replaces dynamic crypto maps and the dynamic hub-and-spoke method for establishing tunnels.

Dynamic VTIs (DVTIs) – DVTIs can provide highly secure and scalable connectivity for remote-access VPNs.

The advantage of using SVTIs as opposed to crypto map configurations is that users can enable dynamic routing protocols on the tunnel interface without the extra 4 bytes required for GRE headers, therefore reducing the bandwidth for sending encrypted data.

Static VTIs (SVTIs) – SVTI configurations can be used for site-to-site connectivity in which a tunnel provides always-on access between two sites.

However, IP VTI is simpler and more efficient than GRE over IPsec. GRE over IPsec VPN could be configured to support routing protocol traffic over the IPsec VPN.

Therefore, routing protocol traffic is not propagated across the VPN tunnel. In this lab, we are going to configure IPsec VTI Site-to-Site VPN capable of supporting the OSPF routing protocol.Ī limitation of IPsec VPNs is that it only forwards unicast traffic across the VPN tunnel. IPsec VTI provides an alternative to GRE tunnels. IPsec VTIs simplify configuration of IPsec for protection of remote links, support multicast, and simplify network management and load balancing. IP security (IPsec) Virtual Tunnel Interfaces (VTIs) provide a routable interface type for terminating IPsec tunnels and an easy way to define protection between sites to form an overlay network. OpenSSL can still be preferred over IPSec. Short for IP Security, IPSec is an Internet Engineering Taskforce (IETF) standard suite of protocols between 2 communication points across an IP network that provides data authentication, integrity, and confidentiality. Facebook Tweet Pin LinkedIn Shares Introduction