I’m back from London and it’s been a great experience. Many readers are interested in what the bootcamp is like. It is a big investment to go for so it is understandable that you want to know if it will
RIP – request and response packets
I was discussing the other day with someone on IRC about a RIP issue he had. Apparently he had RIP request packets coming in and then all routers were responding with response packets with full routing table. It seemed like
RIP MD5 authentication – mismatch in key ID
This is an interesting fact I just found out. When we configure MD5 authentication for RIP they key-ID and key-string must match, this is well known. But what happens if we actually configure the wrong key-ID? Take a look at
OSPF – Use of forwarding address
In OSPF and other routing protocols we have something called forwarding address. This can be used to route traffic in another direction than to the router that originated the LSA. We start with the following topology. It’s a basic OSPF
Route redistribution – filtering and mitigating loops
This post is about route redistribution and the different filtering techniques we have available in our toolbelt. This post requires that you have a basic understanding of route redistribution. For some good posts look at Petr Lapukhovs posts at INE.
Multicast helper map and how to verify multicast
The multicast helper map is an interesting feature. It can be used in scenarios where we want to transport broadcast. Routers don’t forward broadcast by default but we can convert this to multicast and transport it across our network and
RIP timers
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
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
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