Game On Old Friend It’s hard to believe that it’s been almost 2 years since I passed the R/S lab and my digits (40755) were assigned. I remember the numbers just passed 40k and I was so hoping to get 40007. This way I could be 007. <GRIN> Now I’m ready for the next challenge. My motivation for CCIE DC was simple. First I wanted to challenge myself yet again. Second, I feel strongly that a deep understanding of UCS…
#CONFIGBYTES Episode 2 Platforms: Nexus 6000 & 5600 (UPC based ASIC) Latency Monitor: Full Documentation The switch latency monitoring feature marks each ingress and egress packet with a timestamp value. To calculate the latency for each packet in the system the switch compares the ingress with the egress timestamp. The feature allows you to display historical latency averages between all pairs of ports, as well as real-time latency data. You can use the latency measurements to identify which flows…
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…
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
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…