Archived; click post to view.
Excerpt: Moving along in my “Virtual Routing” series, I’d like to switch gears and talk a little more “big picture”. In the previous posts, we’ve discussed a few different things: Part 1 – A first look at the CSR 1000v from Cisco Part 1.9 – An examinations of using FHRPs in a virtual environment Part 2 – A comparison of virtual routing redundancy options Seeing as these were all pretty technical configuration-oriented posts, I wanted to take a step back and think about some of the reasons why one would want to perform routing in a virtual environment. Clearly, the main focus is Data Center,…
Virtual Routing [Part 3 - The Use Case]
May 23, 2013 by Leave a Comment
[Humor] Virtual Routing Inception
May 10, 2013 by Leave a Comment
Don’t ask me what kind of daydreaming it took to arrive at this, but….I just realized that the following was possible: ![screen1 [Humor] Virtual Routing Inception](http://keepingitclassless.net/wp-content/uploads/2013/05/screen1.png "[Humor] Virtual Routing Inception")
Which was ALREADY terrifying enough – but then my mind went here: ![screen2 [Humor] Virtual Routing Inception](http://keepingitclassless.net/wp-content/uploads/2013/05/screen2.png "[Humor] Virtual Routing Inception")
Have a great weekend.
Virtual Routing [Part 2 - Router Redundancy in VMware vSphere]
May 7, 2013 by 4 Comments
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Excerpt: My post a few weeks ago about the CSR 1000v made a pretty big splash – it’s clear that the industry is giving a lot of attention to IP routing within a virtual environment. No doubt, Vyatta is largely credited for this, as they’ve been pushing this idea for a long time. When Brocade announced that they were acquiring Vyatta, and Cisco announced they were working on a “Cloud Services Router”, this idea became all the more legitimate, and as you can tell from this series, it’s of particular interest to me. The overwhelming majority of virtualized deployments in place…
Multi-Vendor OSPF Cost Calculations
April 22, 2013 by 3 Comments
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Excerpt: While on my current kick with virtual routing, I stumbled across an interesting concept regarding OSPF, and the flexibility that vendors have in determining the best path through an OSPF network. The following topology is what I’ve been staring at for the last few days: Pretty simple, right? There’s a single network (192.168.123.0/24) down inside each virtual host where the VMs are to sit. Each host has a router on it (one Cisco CSR 1000v and the other Vyatta Core 6.5), and both routers are OSPF neighbors with each other as well as with an upstream L3 switch. Given this topology, and knowing…
Virtual Routing [Part 1.9 - FHRP Issues in VMware vSphere]
April 19, 2013 by 3 Comments
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Excerpt: I was working on a topology for another post regarding interoperability between the recently released Cisco Cloud Services Router (CSR 1000v) and Vyatta when I ran into an issue regarding vSphere network security policies and First Hop Redundancy Procotols (FHRP) such as VRRP. This post will serve as a precursor to that overall post, but I want to point out a key configuration piece when performing redundant gateways with a FHRP like VRRP. This lab topology is very much a work in progress (note the cross-over cable between the two hosts) and will change as my research for the next post continues,…
Virtual Routing [Part 1 - CSR 1000v First Glance ]
April 16, 2013 by 14 Comments
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Excerpt: As some of you have heard, the Cisco Cloud Services Router (CSR) 1000v has recently been released for download, and I quite literally pounced on it when I first heard the word. For those that haven’t heard, the CSR 1000v is essentially Cisco’s answer to the problem that has existed in datacenters for a while – that the current multi-tenancy mechanisms, especially overlays like VXLAN and yes, even NVGRE, are just not cutting it for everyone. Some cloud providers need something a little higher on the OSI model, in that they’d like to provide multi-tenancy right through to the virtual…
The “D” in SDN
February 12, 2013 by 1 Comment
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Excerpt: I have seen the conversation around SDN evolve over what amounts to the last few years from something that was barely whiteboard material, to something on everyone’s lips in this industry. Why? What’s so interesting about these three little letters? Well, if you’ve heard of it, you’ve undoubtedly heard from your local <vendor> account manager that their product is the leader in the SDN market, or that they just made a big acquisition that really puts them ahead in the SDN space, blah, blah, blah. You might also hear from some particular technical individuals (or peers) that SDN is going…
