NSF and GR on Nexus 5000

NSF and GR are two features in Layer 3 network elements (NEs) that allows two adjacent elements to work together when one of them undergoes a control plane switchover or control plane restart.

The benefit is that when a control plane switchover/restart occurs, the impact to network traffic is kept to a minimum and in most cases, to zero.

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BRKRST-2042 – Highly Available Wide Area Network Design

Presented by: David Prall, Communications Architect, Cisco

For reference, David is the “father of IWAN”.

This session was not what I was expecting. I was expecting design and architecture, but it was all about features in IOS and IOS-XE (eg, FHRPs, talked about routing protocol timers, PfRv3, BFD). I guess I need to pay more attention to the session code (RST == routing; ARC == architecture).

Random Notes From My Third CPOC

I was lucky enough (volunteering for very challenging work is luck, right? 😁) to finish my third tour through Cisco CPOC last wcpoceek. CPOC is Cisco’s Customer Proof of Concept facility where customer’s can bring their network design, build it in Cisco’s lab, and beat the hell out of it. CPOC has tons of network and compute gear, all the right testing tools and processes, and excellent work areas that cater to collaborative work and information sharing. It’s also staffed by very senior and experienced engineers.

I know it’s cliche and I know I’m biased because I have an @cisco.com email address, but I’ve truthfully never seen anything like CPOC before. And the customer’s I’ve worked with at CPOC haven’t either. It’s extremely gratifying to take something you built “on paper” and prove that it works; to take it to the next level and work those final kinks out that the paper design just didn’t account for.

If you want more information about CPOC, get in touch with me or leave a comment below. Or ask your Cisco SE (and if they don’t know, have them get in touch with me).

Anyways, on to the point of this post. When I was building the topology for the customer, I kept notes about random things I ran into that I wanted to remember later or those “oh duh!” moments that I probably should’ve known the answer to but had forgotten or overlooked at the time. This post is just a tidy-up of those notes, in no particular order.

Continue reading Random Notes From My Third CPOC

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