Firefly Perimeter – OSPF over GRE over IPsec

After attending the JNCIE-SEC bootcamp last week, I saw that one topic was barely mentioned: The way of running OSPF over GRE over IPsec. Since this setup is barely used (because of various reasons) I thought, that this is post-worthy – so here you have a working config (running on Firefly 12.1X47-D35.2

 

Topology:

Config for Firefly-A:

 

Config for Firefly-B:

Hope, that this helps you if you ever have to do this or need to learn this…
Remember – this is just a sample – please use stringer ciphers if possible 😉

The JNCIE-Exam is getting closer and closer…