INE’s CCIE R&S v5 topology for EVE-NG using CSR1000v

In my previous blog post I’ve adapted the INE’s CCIE Routing and Switching topology to be used with EVE-NG using IOSv (or vIOS) L3 images for routers and L2 images for switches.

Following the promise in that blog post, I’ve adapted the same topology using Cisco CSR1000v images for routers and IOSv L2 images for switches. There isn’t much to say about this topology since mostly is matching the original INE’s one for routers (including the configuration files) and the major difference is the utilization of virtual switches.

Since we’re using virtual switches, the configuration files for switches are still different. I’ve adapted these ones to match the interface names of IOSv-L2:

Real Switches – vIOS-L2

Fa0/1  - Gi0/0 - SW1 only connection to bridge

Fa0/19 - Gi0/2
Fa0/20 - Gi0/3
Fa0/21 - Gi1/0
Fa0/22 - Gi1/1
Fa0/23 - Gi1/2
Fa0/24 - Gi1/3

For convenience, the switches topology looks like this in EVE-NG:

CCIE R&S V5 Switches

For routers, the interfaces stays the same since we’re using CSR1000v images.

Here is how the network topology looks like. No surprise here, just added for convenience:

INE CCIE R&S v5 topology with csr1000v

If you don’t have the CSR1000v image added to your installation of EVE-NG, please download it ( is a good starting point) and add it following these How-to:
HowTo add Cisco Cloud Service Router (CSR1000V NG) Denali and Everest
HowTo add Cisco Cloud Service Router (CSR1000V) – for pre Denali or Everest images.

If you’re curious I’m using csr1000v-universalk9.03.12.03.S.154-2.S3-std image when testing for this lab.

Before sharing the download links, a word of advice.

It may be that CSR1000v images are more stable and support all features when compared with IOSv-L3, however this comes with a cost in term of resources. Each node has by default 3GB RAM assigned and I wouldn’t recommend trying to decrease it.

Once the nodes boot up, the actual used RAM will be less, but still you need more resources to use CSR1000v.
My recommendation for 10 routers using CSR1000v images would be at least 16GB RAM assigned to the EVE-NG virtual machine. The same if you’re using EVE-NG on a bare metal machine.

Last but not least, somebody asked me when I’m going to provide the same topology with 20 routers.
No need. You can extend the default topology with as many devices as you want. The modified configuration files for labs with 20 routers are already modified and present in the archive you download. Just add the missing R11 until R20 devices.

If you encounter errors that are critical, please let me know and I’ll try to correct them.

Download files:

Happy labbing and let me know if you find these materials useful!

INE’s CCIE R&S v5 topology for EVE-NG

The last days I was working on adapting INE‘s lab topology, most specific the CCIE Routing and Switching v5 one, to be used in EVE-NG.

In my opinion, INE offers some of the best training materials for Cisco and Juniper certifications. Along certification training you can find in their All Access Pass Subscription valuable learning materials for Network Automation, Security and Traffic Analysis (like Wireshark).
By the way I’m not affiliated with nor this post is the result of some sponsorship from INE. I just wanted to have the possibility to use their materials on using the entire topology, including the Switches, in EVE-NG.

I’ve picked Cisco‘s vIOS L3 and L2 images to support the topology in EVE-NG. You can argue that vIOS is a bit unstable and lacks some features, that CSR1000v images are better when combined with real Cisco switches and so on. Yes yes, all these are quite right, but I’m not here to debate about the best way to create a topology, rather a simple and sustainable one which works even for low end devices with less resources (CPU, RAM). Is no secret that vIOS will use less resources than CSR1000v images.

It brings me great happiness to let you know that I’ve succeeded in adapting not only the topology (not that hard honestly), but also the initial configuration files. The challenge lies in the fact that vIOS L2 images are build to support Ethernet ports in group of four, resulting in a slight different naming convention.

If you’ll check INE’s CCIE R&S v5 topology, the Cisco switches are using the Port from 19 to 24 to interconnect. On switch SW1, Port 1 is used to bridge the switching part to the routing one. You cannot replicate this exact port configuration scheme using vIOS L2 images.

I was forced to come with an alternative scheme, to map the original interface to the virtual ones and to adapt the configuration files.

This is what I came with:

INE CCIE R&S v5 switches

The interface mapping is as follows:

Real Switches – vIOS-L2

Fa0/1  - Gi0/0 - SW1 only connection to bridge

Fa0/19 - Gi0/2
Fa0/20 - Gi0/3
Fa0/21 - Gi1/0
Fa0/22 - Gi1/1
Fa0/23 - Gi1/2
Fa0/24 - Gi1/3

For the Routers is easy, since the interfaces are almost the same:

CSR1000v – vIOS-L3

Gi1 - Gi0/1

Here is how the network topology looks like:
INE CCIR R&S v5 Topology

We have 10 Routers using vIOS-L3 and 4 Switches using vIOS-L2. The connections between routers and switches are facilitated by the Net bridge.
10 routers should be sufficient for most of the labs. However if you need more, just add nodes and connect them to the Net bridge using the Gi0/1 interface.

As said previously, the configuration files have been adapted to match the interfaces listed above. I’ve tried my best not to have any errors, I also did some testing, everything looks to be fine. Most probably you’ll notice some errors at the copy / paste, but these are just cosmetic and related mostly to some proprietary CSR1000v commands or management interface which is not needed in EVE-NG. If you encounter errors that are critical, please let me know and I’ll try to correct them.

If somebody from INE’s team reads this post (that would be something :)) and consider inappropriate to share the modified initial configuration files, please let me know and I’ll take them down. They are derived from the public available ones on the CCIE R&S v5 Topology Diagrams & Initial Configurations page and do not contain any workbook information or somehow else related to INE’s training materials.

Download files:

Happy labbing and let me know if you find these materials useful!

IP Prefix-List tricky question

A few days ago I did encounter a task in one of these preparation workbooks for CCIE R&S Lab which was very tricky. This task is not a hard one and does not require extensive knowledge (it can be a CCNP level question as well), but the way the question is formulated can create confusion.I would appreciate your comments on this topic.

The task states that I have a number of subnets from which the followings are important for
our issue:

The other present subnets are something like 10.7.x.x. I add this here just to see that it does not affect the result of this task.

The request is to configure a prefix-list following these rules:

– allow all subnets in
– as specific as possible, I should not allow other prefixes
– minimum number of prefix-lists

Considering the above one I did consider the following to be the correct answer:

ip prefix-list ONE permit ge 25 le 30

However the proposed solution was:

ip prefix-list ONE seq 5 permit ge 23 le 30
ip prefix-list ONE seq 10 permit ge 23 le 28

Both solutions are working, nevertheless which one would be the correct one in the exam?

I asked this question on the GroupStudy List, and Maarten Vervoorn came up with a new proposal:

ip prefix-list ONE seq 5 permit ge 28 le 30
ip prefix-list ONE seq 10 permit ge 25 le 27

Also a good solution, but is the best solution? Hard to say. The advice that I got is that if you have such task in the lab exam to describe the issue to your proctor, explain all possible solution so he or she can see that you fully understand the multiple solutions and base on the answer pickup the best solution. I think this is the only way to solve this kind of questions. If you have other ideas, I would like to hear them.

FREE INE 5.5 hours rack rental CCIE RS

FirstDigest Professionals Community is offering a free InternetworkExpert 5.5 hour session rack rental for CCIE Routing and Switching preparation.

What you have to do win it?
After you register for FirstDigest Community stay active and help develop this community. There is no target. The winner will be chosen by our team based on their activity during this promotion period.
User activity checking will be done with automatic tools but also human intervetion.
Follow the rules of this community and stay in the range of topics that is the object of this forum.
“Fake” activity will not lead anyone to the winner position.

How do you receive your prize?
In terms of maximum 5 days from the promotion end, the winner will be announced through PM to establish the details and a public message will be posted in this thread.
In the eventuality that this prize cannot be received by winner, or in case of any technical difficulties, the amount of money will be transfered in his or her PayPal account.
Cost of this prize will be supported by FirstDigest Community team

Other notes
Please understand that this type of promotion is in a BETA status. Errors may appear, but we will do everything which is our power to stick to the rules and provide the promise part.
If you have any question please feel free to post them below or contact us.

You can find this post at:

CCIE Routing and Switching Exam Certification Guide, 4th Edition

I just received the news that Cisco Press will release on 19th of November 2009, the 4th edition of  CCIE Routing and Switching Exam Certification Guide by Wendell Odom, Rus Healy and Denise Donohue.

A brief description from the Cisco Press site:

CCIE-RS-Cert-Guide-4th-Edition“The CCIE Routing and Switching certification is the most respected certification in the industry. The successful CCIE candidate must understand a broad range of network technologies that includes OSI model, bridging, LAN switching, IP and IP Routing protocols, multicast, WAN technologies, and performance management. The exam is notoriously difficult and CCIE candidates must first pass a qualifying written exam. The CCIE Routing and Switching Exam Certification Guide, Fourth Ed., covers all of the topics of the 4.0 written exam. In this updated edition there are content and alignment changes based on the revised v4.0 exam. The newest edition includes 300 pages of new content covering the following topics:

Network optimization


BGP routing policies

Expanded QoS coverage

Expanded WAN coverage

Expanded multicast coverage

Expanded MPLS coverage

IPv6 redistribution”

Currently you can pre-order the book and it will be delivered when published. If you are lucky enough to live in U.S. you can have it shipped for free.

Price and full details about this product can be found on the Cisco Press site.