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Subscribe to this list via RSS Blog posts tagged in Nexus 2000

Posted by on in Data Center

Without going into irrelevant details, someone was recently working with Nexus setup in a lab. As you may know, the N7K requires specifying the FEX type. Or did the last time I tried doing without it, a while back. Why, I don't know, it should be able to figure it out like the N5K does. Perhaps the programmer was squeezed on time. Or needed that extra 5-10 minutes for lunch. 

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I have been working with a customer testing a pair of Nexus 5548s and dual-connected FEXes.  Here are a couple of our lessons learned.

Thanks to Bob Harper for his follow-up emails concerning my CMUG presentation on vPC, FEX, and Datacenter Virtualization. If you haven't read the presentation, it can be found at  Follow-Up to vPC, FEX, and Datacenter Virtualization CMUG. (Thanks to Cisco for permission to use and even re-arrange a ton of their slides to convey my message.) I'm posting an edited version of our discussion thread with Bob's permission, in the hopes it'll be of interest and perhaps stir up some debate. Or at least provide amusement. 

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In this CMUG session I primarily discussed datacenter access layer virtualization. The content drew slides from several CiscoLive 2011 presentations, accompanied by some slides of my own. The intent was to try to look at datacenter virtualization from a slightly different perspective.

One goal of the talk was to provide fairly solid coverage of VPC and FEX (Nexus 2000) designs and best practices. Another theme was that the VN-Tags (former Cisco term) and VN-Link technology present in the Nexus 2K FEX are logically present in the Cisco 1000v, and literally present in the Cisco NIC adapter technologies named Adapter-FEX and VM-FEX. These provide per-host and per-VM virtualization of a NIC, allowing the logical interfaces to then be configured on the attached Nexus 5500 switch. In effect the NIC (or "VIC") behaves somewhat  like a hardware-based version of the Nexus 1000v, with the Nexus 5K doing the switching in hardware. 

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This is the second article on my series on QoS on the Nexus 5000 (N5K) and Nexus 2000 (N2K) for medical grade networks. The first article was QoS on the Nexus 5000/2000 - Part 1. (I apologize it took me so long to get back to this series!)

In the previous article, I discussed some MQC background as well as key aspects of QoS on Nexus 5000/2000 switches. I also discussed queuing and queue structure on Nexus 5000 and 2000 switches. (I don't mind if you want to go review that article before going on... Wink)

I also provided a brief outline of the six steps to configure QoS on a Nexus 5000/2000 switch:

Carole Warner Reece and I had the pleasure last week of attending a combined Nexus 7000 and Nexus 5000 / Nexus 2000 course taught by FireFly in NJ. (http://www.fireflycom.net/).  I'd like to share a few insights, tidbits, tips, and gotchas about the Nexus 5000 and Nexus 2000. My premise here is that many of us have sort of been paying attention to the Nexus products, but maybe weren't totally tuned into the details. I hasten to add that any mistakes here reflect my own misinterpretation, I am not quoting the Cisco courseware. 

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Posted by on in Data Center

I've been reading up heavily on the various aspects of Cisco Nexus and Data Center technology. While I am constitutionally unable to cheerlead, I must say I'm pretty impressed with the breadth of the vision. There are some mild feature gaps and good things to come, but overall the products look like they'll meet the increasing Layer 2 design robustness needs of customers going forward. I do still intend to apply the "beer principle" -- too much of a good thing may give you a headache!

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