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Forum Replies

  1. René,

    Congrats for share this excellent explanation!!! I’m from Brazil and I don’t have a good English, but I can understand each word, sentence that you used in this article. I never had understood about this subject, maybe because I really didn’t study it with attention and deeply. I’m a beginner Network Admin and when I saw this article in my feed I started to read it and understand it and I’m amazing how you can teach it like this way.

    But I have a doubt where I can’t see in examples above. Using this topology, if tomorrow for any reason Blue and Red make a

    ... Continue reading in our forum

  2. Thanks Rene, im now studying EVN, and you mention that

    “When we use VRF lite we have to configure sub-interfaces for each VRF on the Gigabit3 interfaces of ISP1 and ISP2. Each sub-interface belongs to a different VRF and uses 802.1Q encapsulation to differentiate the different VRFs.”

    but there’s no scenario here in VRF lite where you configure 2 ISP and have a subinterface both on each.

  3. Thanks Rene, great tutorial.

    Let us know when you do a tutorial for MP-BGP, that is of particular interest to me as we will become responsible for a network using MP-BGP in the near future.

    Cheers

    Ian

  4. Hello AZM

    Using the above two types of syntax will essentially provide you with the same result. Looking at this Cisco documentation, about configuring static routes in Nexus 9000 devices, both configurations are described.

    The second syntax can be applied by issuing the command ip route 10.0.0.0/24 10.1.1.1 without the VRF instance being mentioned. This would result in applying this static route to the present VRF or the default VRF. If you want to apply it to another VRF, then you can specify it explicitly. (see step 2 here)

    I hope this has been helpful!

    Laz

  5. Hi Azm,

    Let me jump in on Cisco VIRL. I can highly recommend to run it in VMWare ESXi, it’s free and saves you the hassle of messing with network interfaces etc. Although I really like VIRL, I had some issues with updates that went wrong and deploying a new OVA template in ESXi is much easier than reinstalling a physical box.

    Look on eBay for an older server that has plenty of RAM and 2x CPUs or something like that.

    I still use an HP proliant DL360 G7 with 96GB of RAM which is great for Cisco VIRL:

    $325 for 8 physical cores (16 with hyperthreading) and 64GB RA

    ... Continue reading in our forum

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