Tag: tunneling

How VPN Tunneling Works | Generic Example | Remote User VPN

There are many “styles” of VPNs that exist, but the fundamentals of how everything works is basically the same. A VPN, or Virtual Private Network will essentially create an overlay network on top of an existing network fabric. Sometimes the existing network is the internet, but that’s not always the case, it could also be…
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Why Change the IP MTU on GRE Interfaces?

If fragmentation occurs at the physical interface instead of the GRE tunnel interface, then we could end up with fragmented GRE packets. These fragments would need to be dealt with by the router on the other end of the tunnel; this could degrade network performance. By modifying the IP MTU on the GRE tunnel itself, fragmentation…
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