Aaron's Worthless Words

Sign in Subscribe

eigrp

Advertising a Default Route Into EIGRP

Let’s get an IPv4 default route into EIGRP. There are a few methods to do it. I hate most of them, though. I think it will be obvious which one I like. Here’s the lab I have set up to test everything. I want R4 to generate the

EIGRP and OSPF - Are We Connected?

For both OSPF and EIGRP routers to become neighbors, their interface’s primary IP address must be on the same subnet. That statement is true. There is a difference in the definition of “same subnet”, though. In OSPF, both routers have to be configured to be on the same subnet

EIGRP Redistribution - Default Metrics of Connected and Static Routes

I wanted to do some analysis of the EIGRP topology table last night, so I fired up a small lab. I was especially interested in how external routes appear there and compare to internal entries. Like all good scientific endeavors, the whole thing got derailed when I made a realization.

EIGRP Notes - Authentication

Corrections – I invite them. 1. Create the keys in the keychain. R101(config)#key chain KEYCHAIN R101(config-keychain)#key 1 R101(config-keychain-key)#key-str R101(config-keychain-key)#key-string MYKEY 2. Enable authentication on an interface. R101(config-if)#ip authentication mode eigrp 1 md5 3. Associate keychain with EIGRP. ip authentication key-chain eigrp

EIGRP Notes - Route Filtering

As always, correction are encouraged. You can configure an EIGRP router to filter routes from being advertised or from being accepted. Objective: Filter out the route to 10.0.254.1/32 from being advertised to the rest of the network via EIGRP. ip prefix-list PRE1 deny 10.0.254.

EIGRP Notes - Unequal Cost Path Load Balancing

Per the standard rules, please correct anything that’s wrong. One of EIGRP’s big features is the ability to use unequal cost paths for load balancing. This is done with the variance command. variance : A multiplier used to calculate which feasible successors can be used as active routes. The

EIGRP for IPv6 - The Basics

I'm not going to go all out like Jeremy over at Packetlife.net has, but I'm going to start to discuss a few IPv6 topics. In time (like in September when APNIC runs out of IPv4 addresses), I'm sure I'll ramp up