RIP timers are the most basic thing in the world right? Even the command to set them is named timers basic… However in some documentation it is not really clear what the difference is between the invalid and holddown timer.
Conditional default route – RIP
I did Vol1 RIP labs yesterday and I wanted to show you some cool stuff. How to do conditional default routing, this is lab stuff but some of it is definetely useful for real life deployments as well. I will
OSPF adjacency over non common subnet
Found out an interesting thing while doing a Vol3 lab. We all know that EIGRP will not form an adjacency over a non common subnet unless special circumstances. What about OSPF? I had a lab task where I need to
Redistribution lab in GNS3/Dynamips
At first I had some trouble understanding route redistribution. I’ve tried getting better at it and now I have a solid understanding of it. Darren did some labs on his blog and I decided to give it a go as
Don’t forget ip routing on switches
Yesterday I did a vol3 lab and one of the tasks was to enable EIGRP on a couple of the switches. I had enabled EIGRP, however I was not getting any routes installed in the routing table. Look at the
Filtering RIP routes with an offset-list
As you all know RIP is a distance vector routing protocol and that gives us a lot of options when doing filtering. This time we will look at a feature that is not widely known, the offset list. Assume that
Enhanced Interior Gateway Protocol (EIGRP) – notes
Cisco proprietary Uses IP protocol 88 as transport Support for MD5 authentication (no clear text) Sends updates to 224.0.0.10 Distance vector but has some link state like features Timers Uses a hello and a hold timer. Neighbors discovered via hello
OSPF – Open Shortest Path First (notes)
Defined in RFC 2328 Supports VLSM and CIDR Is a link state protocol Uses a link state database (LSDB) for topology information, identical within area Reliable flooding of LSAs Uses hello protocol to build adjacencies Runs directly over IP,
Notes on RIP
RIP is not as common these days as it used to be but it can still have its uses in small networks. It is also still tested in the CCIE lab. Here are some notes I have written down. RIP