BGP Best Path Selection: Origin

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For the last few days I have been studying for my CCIE R&S lab and have been doing every practice lab I can get my hands on. The one thing they all seem to...

Latency Issues – IP Redirects

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Sometimes, you may run into a situation where traffic enters a routed interface and then per the routing table, exits the same interface. For instance, take a look at the topology below: In that topology...

#RoutingTableLive – MPLS Lab

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Decided to get at it early this morning since I booked my second CCIE RS attempt last night. This was a good MPLS lab with two VRFs (RED and BLUE). Two clients on each...

BGP – Summarization – Aggregate Address

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There are many ways that routes can be shared between BGP neighbors as we all know. Sometimes there are specific requirements though as to how they need to be shared or if you want...

Basic EIGRP Authentication

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Security is a great thing isn't it. Let's look at another section of security: EIGRP authentication. This is applied on an interface that is connecting to another host(s) as an EIGRP neighbor. First things...

Controlling Shared BGP Routes

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Keeping your router table in check is something that any network administrator should be concerned with, especially with BGP. Accepting a full routing table from your ISP over BGP can put a good bit...

Cisco DMVPN Configuration Guide

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DMVPN was next on my list to begin looking into for my CCIE exam so I decided to get a brief intro to the technology today as I sit here sick at with two...