Eric Stewart: Running Off At The Mouth

Nexus 7700 Part VI: vPC Part II: You Can’t Use The Peer-Link For Everything

by on Feb.21, 2015, under Uncategorized

$JOB doesn’t have as much of a testing environment as one might like to have, so sometimes you discover issues during implementation that, once you resolve them, you can’t go back and pick apart. An issue with the vPC Peer link appears to have prevented one of our 7710’s going into our data center from properly forming an OSPF adjacency with the DR.

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Nexus 7700 Part V: TCAM Woes and Solutions

by on Jan.21, 2015, under Networking, Technology

I get an error message while pasting in some VLAN interfaces:

ERROR: Module 1, 2, 10 returned status: Tcam will be over used, please enable bank chaining and/or turn off atomic update.If bank-chaining is enabled on other modules and this is a new linecard insertion,please enable bank-chaining prior to reloading this module.

Well, this (I think) is what it means, and how I resolved the situation.

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Nexus 7700 Part IV: vPC – Basic Configurations and Annoyances

by on Jan.08, 2015, under Networking, Technology

Having been silent about my Cisco Nexus 7700 work for a while, I come across something that irked me a little bit while trying to configure our 7700 pair to replace the 6500s, involving Virtual Port Channels. So here’s what Virtual Port Channels are and how they basically work, as well as one or two things that you might want to be aware of. So, this may end up getting quite long …

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A Day With the iMac: Photo Syncing

by on Nov.29, 2014, under Computers, Technology

So we’ve had some computers die and were in need of something for a specific purpose: something to sync and backup our iOS devices with. Seeing as how we were originally using Windows for that, you’d think we’d have just gotten a cheap Dell or something. But, no. After some discussion, we got a refurbished iMac from Apple. Given that we were used to how Windows worked, this may have not been the best idea … even for someone who otherwise likes Macs, like me.

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A Day (and The Month Before) with Verizon

by on Nov.16, 2014, under Cell Phones & Providers, Technology

In which I regale you with the story of a wholesale warehouse company’s crappy timing; me attempting to purchase, at most, three phones; ending up with orders for five; get passed around (and tell the same story) to around four people over the phone with Verizon and then again to two or three people at a Verizon store; and also receive a phone call from a disgruntled former provider.

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A Day With the iPhone 6+ (WARNING: Language)

by on Nov.16, 2014, under Cell Phones & Providers, Technology

So, it took me a while to get around to ordering one and it took even longer for the phone to actually make it to me … but that’s a story for another post. For this post, I’m going to avoid anything too specific to my (new) cell provider, and try to focus strictly on the phone.

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ISC DHCP – “subnet” vs “pool” Declarations

by on Aug.08, 2014, under Networking, Technology

We ran into a little issue that, while others might think it simple, we had never seen before. A client requests a reserve lease; once the lease is provided, their PC wasn’t getting a gateway address. Here’s why (as far as I know at this time).

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Nexus 7700 Part III: Breakout Interfaces

by on Jul.15, 2014, under Networking, Technology

It is possible on the Nexus 7700 line, with certain optics, to break out 40Gb (and eventually 100Gb) to 4x10Gb interfaces (no one knows for sure what 100Gb will do – it will either be 8x10Gb or 10x10Gb). In this post I go over how $JOB is doing it (at least with the 40Gb) and what you need to be aware of. I do touch a little bit on the 100Gb breakout future and explain why we were looking to do it.

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Nexus 7700 Part II: Racking a Cisco Nexus 7710

by on Jul.08, 2014, under Networking, Technology

We racked our Nexus 7710 recently. Here’s some of the things you might need to know regarding getting this monster of a chassis into a rack.

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So I Went To My Second Cisco Live …

by on Jun.25, 2014, under Life, Networking, Technology

I figured I should get this written while I can, and before it all fades away from my brain … here’s my thoughts on Cisco Live and some advice for future first-time attendees.

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