OSPF Configuration Comparison

After a bit of a discussion on Twitter regarding whether you should run OSPF on the connected interfaces (configuring them as passive, as required), or redistribute connected in IOS (I prefer the former, as I don’t believe type-5 LSAs that aren’t ACTUALLY external prefixes should be created), we got onto the topic of how various network operating systems configure IGPs, specifically OSPF. I figured this might make for an interesting discussion, so I’ll present the configurations from Cisco’s numerous different IOS variants, as well as Junipers one and only Junos. (See what I did there?) (more…)

Virtual Network on a Single Junos Router

I wanted to do a simple tutorial for creating a full network on a single Juniper router, and after having a colleague asking about it, I decided it was time. (more…)