What is SVTI Virtual Tunnel Interface? How to configure IPsec Static virtual tunnel?
The virtual tunnel is also called native IPsec, VTI does the same job that GRE with IPsec does. They both encrypt the tunnel with IPsec. VTI removed the additional 4 bytes GRE header, thus reducing the bandwidth for sending encrypted data. VTI allows to configuration of ACL, NAT, and QoS. remember the default mode for a tunnel is GRE you have to define the mode IPsec IPv4 to configure the SVTI tunnel.
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There are two types of VTI (Virtual Tunnel Interface)
1. Static Virtual Tunnel Interface
2. Dynamic Virtual Tunnel Interface
configuration for SVTI is very simple we do not need to define interesting (ACL) traffic. configuration same just like we configure GRE with IPsec but with a small difference, we have to define the tunnel mode.
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