CCIE #40755 (Routing & Switching)

CCIE #40755 (Routing & Switching)

“It’s gonna take time, a whole lot of precious time, it’s going to take patience and time to do it right child.” “It’s gonna take money, a whole lot of spending money, it’s going to take plenty of money, to do it right” -George Harrison Song: I got my mind set on you  I’m pretty sure George had the ladies on his mind and NOT the CCIE when he wrote that song. I can tell you no other lyrics resonate…

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CCIE Studies: Performance Routing PfR/OER

CCIE Studies: Performance Routing PfR/OER

Prologue Hey fellow CCIE’s candidates and networking geeks. Today I want to step deep into the realm of PfR or Performance Routing. First let’s go back in time to the predecessor, Optimized Edge Routing or OER. As crazy as this sounds, OER came out in 2006 with IOS 12.3 . So, technically before all this SDN fanfare, Cisco actually decoupled the control (part of it at least) and data plane with OER/PfR back in the dizay. DID THAT JUST BLOW…

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Apple Still Got It: Mac Pro (aka R2-Q5)

Apple Still Got It: Mac Pro (aka R2-Q5)

WOW! Being in the technology business for over 12 years, I admit it’s hard to get excited over new product announcements. Most of the time it’s minor tweaks and updates to the hardware platforms, faster processors, better performance, increased scale, new coat of paint and polish to the OS. You know the norm. I was thinking this would be the story for Apple’s WWDC today, but boy was I wrong about the Mac Pro. Apple went ahead and gave firm…

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Cisco UCS: Virtual Interface Cards & VM-FEX

Cisco UCS: Virtual Interface Cards & VM-FEX

Hello once again! Today I decided to talk about some Cisco innovations around of UCS platform. I’m going to try my best to keep this post high-level and EASY to understand as most things “virtual” can get fairly complex. First up is Virtual Interface Card (VIC). This is Cisco’s answer to 1:1 mapped blade mezzanine cards in blade servers and other “virtual connectivity” mezzanine solutions. Instead of having a single MEZZ/NIC mapped to a specific internal/external switch/interconnect we developed a vNIC optimized for virtualized…

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Data Center: Nexus vPC Technology

Data Center: Nexus vPC Technology

Hi Cisco friends! I had a great question from a customer today regarding failure scenarios and vPC. On the surface, I thought this is an easy one. However, when I really gave it deep thought it really depends on the type of failure. Was the failure on the peer-link, peer keepalive, vPC member port, or the worst case dual active/double failure? Let’s go through some of the failure examples. vPC Member Port Failure If one vPC member port goes down – for…

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Cisco: Algo Boost Nexus 3548 Preview/Unbox

Cisco: Algo Boost Nexus 3548 Preview/Unbox

I got something very cool last week. It came overnight from my good friend Frank in NY. What we have here is a very special privilege folks. It’s a prototype of the Nexus 3548 ultra low latency switch using our custom ASIC called Algo Boost/Monticello. Instead of killing you with all the details I decided to create a video of the un-boxing and special features walkthrough. Enjoy! https://www.youtube.com/user/4g1vn/featured    

Private VLANs (PVLANs)

Private VLANs (PVLANs)

I recently had one of my customers asked about private VLANs and the benefits/use cases. I thought this was a good opportunity to refresh my knowledge of PVLANs because it was a weak area of mine during my last CCIE lab. What are Private VLANs? The main objective with PVLANs is conserving IP space, but still allowing L2 separation for security purposes. Typically, VLAN design calls for a single IP subnet for each VLAN. Here we are able to create multiple (secondary VLAN/s) VLANs for isolation, but…

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Cisco: Nexus 2000 (FEX) Configurations

Cisco: Nexus 2000 (FEX) Configurations

It’s been way too long since I posted on my blog. Well, I have been studying for the CCIE Data Center lab and wanted to pass on some very critical information on fabric extender (FEX) configurations. One of the most common questions that our Cisco friends ask me is “Why do I need to create a port channel for the FEX-Fabric links?”. Well let’s dive into the WHY, and then explore the HOW. Let’s first start with a foundation on what FEX is and how it…

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