When POHO isn’t psycho enough – a home network update in progress

If you’ve been around for a while, you will know that POHO, or Psycho Overkill Home Office, is an ongoing theme of this blog. I’ve described it more than twice as “two comma technology on a one comma budget.” It stands to reason that my home network is in the “psycho overkill” range, with three sites connected by VPNs and internal 10 gigabit networking (40 gigabit on its way).

Disclosure: Much of the gear in this post is Cisco Meraki, and much of that was obtained using employee purchase program benefits as a Cisco employee. As a system engineer I was eligible for free renewals on my licenses for the Meraki gear, but the original licenses and most of the hardware purchases were out of my own pocket. Any other gear mentioned was purchased out of my own pocket through mainstream methods (i.e. eBay) unless otherwise noted. Cisco has not reviewed, influenced, or endorsed this post or this blog, and they most likely won’t.

A photo before everything was recabled. There are a lot more ports in use now.

What’s the POHO like today?

In the past two years I’ve been running a somewhat crippled network, despite having pretty good employee purchase benefits at work. Still, with gigabit fiber and 500 megabit cable, I’m at about 2.5x the capacity of my core router.

I’m running a Meraki MX84 as the core of my home network, with AT&T / Sonic fiber as primary, and Comcast as secondary. It downlinks to an MS42p 48-port switch with four ports of 10 Gigabit Ethernet. On the upstream side, it connects via Meraki’s auto-vpn to an MX64 in my shop across town, and to a Z1 Teleworker unit in my garage that keeps some lab gear protected from the world (and simplifies IP addressing).

I have a couple of MS switches around the networks, as well as a Cisco Small Business SG500XG-8F8T, a Netgear MS510TXPP (for mgig POE) and a couple of other brands in use from time to time. Wireless is handled by MR56 and MR34 in the house, MR18 in the garage, and MR16 in the shop.

Unfortunately, the MX84 is limited to 500mbps of stateful firewall or 320mbps of advanced security throughput. I’m getting pretty close to that, but the other half of the uplink is idle unless I switch over to the other side of the MX.

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Test-driving third party optics from StarTech in the RSTS11 labs

Disclosures at the end, as usual.

This fall John Obeto asked if I’d be willing to try out some third party optical modules in some of the varied and random switches I have around the rsts11 home lab. Always willing to help a friend and try some new gadgets, I accepted the challenge. Today I’ll give you an idea of why you might consider third party optics for your switching, why you might not, and how the compatible modules from StarTech.com impressed me.

2018-12-01 14.02.27WHAT ARE OPTICAL MODULES?

First, a word on optical modules. For decades, switch manufacturers have made two kinds of ports on their switches, a fixed port and a modular port. Fixed ports were long popular on line cards, where you wanted to get 24-48 (or more) optical ports for fiber cabling into a small amount of space, and you knew your customer was not going to change their optical requirements on the fly.

Modular (or “pluggable”) ports, however, made it possible to sell switches at a lower initial cost and allow the uplinks to be populated later. It also enabled customers to use different connection lengths and media with the commensurate power considerations.

In Gigabit Ethernet (and 1/2/4 gigabit Fibre Channel), the standard has been the Small Formfactor Pluggable, or SFP, module. About the size of a AA battery or a small USB flash drive, it connects to a small blade port inside the switch, and “translates” the connection to short (SR), long, (LR), or extended/extreme (XR) range optics, or even to 1000Base-T copper.

For 10 Gigabit Ethernet (and 8/16 gigabit Fibre Channel), the standard is an extension of the same module called SFP+. Many installations within a rack or in adjacent racks will use copper SFP+ cabling (with no fiber involved), sometimes called Direct Attach Copper or DAC cabling. Continue reading