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...

OSPF Max-Metric

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It's nothing new that OSPF uses a system of calculating the cost of a route to determine the open shortest path first (OSPF). Sometimes users want to manipulate the path that traffic will take...
split-horizon

When to Disable EIGRP Split-Horizon

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Within a properly configured network, one thing that is very important is loop prevention. A Network loop can bring a wide range of issues from misrouted traffic to physical effects on devices such as...

OSPF LSA Types

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OSPF is a commonly used IGP used in a wide range of enterprise environments. It uses its algorithm to determine the shortest path to the destination network address. This algorithm is based on the...
next-hop-self topology

When to Use BGP Next-Hop-Self

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When beginning their CCIE studies, some people, including myself, wonder exactly when the next-hop-self option of BGP should be used. For this example we will use the topology above. Routers 1 and 2 have...

Two Methods of MPLS Interface Configuration within OSPF

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Within all of the practice labs I have worked through for the CCIE Lab exam and in most real world applications I have seen, MPLS networks are run on top of (or within) an...

OSPF DR Election Process

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OSPF is a routing protocol that is popular because of the compatibility between vendors, compared to EIGRP being a Cisco proprietary routing protocol. One major component of OSPF is the usa of...