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
Integrated Routing and Bridging
Sorry for the lack of updates lately but I spent the whole last week skiing and recharging my batteries and now I’m back fully motivated to continue my path to the lab. This time we will be talking about Integrated
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
IP SLA trickery
This tuesday our primary Internet provider had a major outage. We recently got a backup but it was not implemented yet but I had to implement it in a hurry to get us back online. I had prepared most of
IP forwarding – notes
Fast switching First packet to a specific destination IP is process switched. With the first packet the router adds an entry in the fast switch cache, also called route cache. The cache contains the destination IP, data link header information
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