Bridging across GRE tunnels (experimental)

In former posts, i already mentioned the flexibility of GRE tunnels.
A few days ago, i tried to assign a Tunnel interfaces to a bridge-group to get Layer-2 conectivity between 2 sites.
Unexpectedly, it works, although bridge-group commands aren’t supported on Tunnel interfaces.
Here`s a small image, to illustrate the setup

The setup in this example is using  c3725-adventerprisek9-mz.124-15.T6.bin [...]

Using EIGRP with IPSEC encrypted GRE tunnels

In one of my last posts, GRE tunneling with IPSec encryption, i explained the setup of a simple ipsec-protected GRE connection.
When your network is a little bit larger than my test scenario, you would prefer to use an dynamic routing protocol between your routers (hilde and maria in my case).
Nothing easier than that….
Here’s an example using [...]

GRE tunneling with IPSec encryption

Some times ago, a frequently mentioned feature in networking blogs was “GRE tunneling with IPSec encryption”. I tried it out and found it awesome.  (in the meanwhile, we use it in production) . When i need encrypted communication between to endpoints, i would prefer IPSec-encrypted GRE rather than Site-to-Site IPSec-VPN because:

its easier to configure (no longer [...]