CCIE R&S Practice Labs Category

Physical Topology to Logical Topology

July 10th, 2014 rstut 12 comments

Knowing how to convert a physical topology into a logical topology that suits your demand is the first thing you have to do for your network to get up and run. In practical most of the networks are connected like this:


As you can see, all the routers are connected to two switches Sw1 & Sw2. If the network is large enough, Sw1 & Sw2 should belong to Core layer which requires high speed switching because they have to do hardest work in the network. They should be powerful to mitigate congestion if occurs. Redundancy is also very important in this layer by providing multiple paths so that when a link goes down packets can still travel to the destination. Sw3 & Sw4 requires less power to proceed traffic and they should belong to Distribution layer. The last layer, which is not presented here is the Access Layer where switches are connected directly to the end users/terminals. In fact Sw3 and Sw4 can be used in Access Layer if the network is not large.

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EIGRP OSPF Mutual Redistribution and Filter Lab

April 19th, 2014 rstut 19 comments




1) Ensure R2, R3 can learned all the prefixes from EIGRP 10 as EIGRP External Route (D EX).

2) Guarantee if R2 or R3 dies R1 and R4 can still access services on R7. No default route is allowed in this lab.

You can download the initial configuration file here:

The IOS I used to run this lab is c2691-adventerprisek9-mz.124-5a.bin but you can use others.

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