Eigrp

Advertising a Default Route Into EIGRP

2014-07-06 ·4 min read

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 …

default eigrp route

EIGRP and OSPF - Are We Connected?

2014-06-27 ·2 min read

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 …

eigrp mask neighbor ospf peer subnet

EIGRP Redistribution - Default Metrics of Connected and Static Routes

2014-06-19 ·5 min read

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 …

connected eigrp redistribute redistribution route static topology

EIGRP Notes - Authentication

2011-06-10 ·1 min read

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 …

350-001 authentication ccie chain eigrp key md5 written

EIGRP Notes - Route Filtering

2011-06-07 ·1 min read

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 …

350-001 ccie eigrp filtering notes route

EIGRP Notes - Unequal Cost Path Load Balancing

2011-06-06 ·1 min read

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 …

balancing ccie cost eigrp notes path unequal variance

EIGRP for IPv6 - The Basics

2011-01-31 ·4 min read

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), …

config eigrp example ipv6

Tagging External Routes in EIGRP

2010-12-03 ·2 min read

EIGRP allows you to tag external routes. That is, any route redistributed into EIGRP can be tagged with a numeric descriptor from 0 to 4294967295.

bgp egp eigrp external igp ospf redistribution route routing tag

ROUTE Notes - Further IGP Redistribution

2010-07-18 ·3 min read

As always, corrections are requested. Study Questions I’ve got IGRP and EIGRP both configured with the same AS number. What’s special about this configuration? If both use the same AS …

642-902 bgp ccnp certification cisco eigrp exam ospf redistribution route test

ROUTE Notes - Even More IGP Redistribution

2010-07-17 ·5 min read

I didn’t do so well on IGP redistribution the last time out, so here’s some more stuff to study. As always, feel free to correct. Study Questions What three things are needed to be able to …

642-902 cisco eigrp ospf redistribution route test