{% set baseFontFamily = "Open Sans" %} /* Add the font family you wish to use. You may need to import it above. */

{% set headerFontFamily = "Open Sans" %} /* This affects only headers on the site. Add the font family you wish to use. You may need to import it above. */

{% set textColor = "#565656" %} /* This sets the universal color of dark text on the site */

{% set pageCenter = "1100px" %} /* This sets the width of the website */

{% set headerType = "fixed" %} /* To make this a fixed header, change the value to "fixed" - otherwise, set it to "static" */

{% set lightGreyColor = "#f7f7f7" %} /* This affects all grey background sections */

{% set baseFontWeight = "normal" %} /* More than likely, you will use one of these values (higher = bolder): 300, 400, 700, 900 */

{% set headerFontWeight = "normal" %} /* For Headers; More than likely, you will use one of these values (higher = bolder): 300, 400, 700, 900 */

{% set buttonRadius = '40px' %} /* "0" for square edges, "10px" for rounded edges, "40px" for pill shape; This will change all buttons */

After you have updated your stylesheet, make sure you turn this module off

How To Deal With The Cisco Unsupported Transceiver Error

by John Ciarlone on October 21, 2014

service Unsupported TransceiverThese days, most businesses understand that networking equipment is largely standardized and interchangeable.  While there may be certain benefits to sticking solely on one brand, by and large one network component is expected to be able to connect to components from other brands.

There's an unfortunate exception to this, one which leads to people paying far too much for an "official branded" version of a very simple piece of hardware: the basic Small-Form Plugable (SFP) optical transceiver.  

Unfortunately, owners of Cisco Catalyst switches are discovering that they aren't "supposed to" use any SFPs except those made by Cisco.  Attempting to use a third-party SFP results in a "Cisco unsupported transceiver" error or shown in the CLI as UNSUPPORTED_TRANSCEIVER error.

The good news is, there's a very simple workaround.

Short on time? Download our free guide- The Truth About Cisco Compatible  Transceivers 




optical transceiver

What's The Big Deal With Cisco Catalyst and 3rd-Party SFPs?

The big deal is that a Cisco Catalyst switch will shut down a Gigabit port entirely rather than allowing a third-party SFP to access it.  When a user plugs in a third-party transceiver, the Catalyst quizzes the SFP for its make and model.  If it doesn't report back as Cisco, the port is shut down.

There is no good reason for this, besides Cisco wanting to overcharge for a very simple piece of hardware.  Any properly-made transceiver will work just fine on any equipment, and we've seen no credible reports of actual negative effects from using third-party SFPs.  This appears to simply be scaremongering.

So, if you don't want to overpay for a branded SFP, here's what you do:

Two Steps To Making Catalysts 3rd-Party SFP Compatible

There are just a couple commands you need to enter in the IOS command line interface.  First:

# service unsupported-transceivercisco unsupported transceiver

This undocumented command does pretty much what you'd expect, except at this point the Catalyst will make one last attempt to deter you from continuing.  It puts up an error message which says, in brief, you'll get no support from Cisco in what you're doing and are risking voiding your warranty if the SFP breaks the Catalyst.

No, it does not void your warranty, that would be illegal.=, another scare tactic.

None the less, it doesn't actually stop you from proceeding.  So, enter the second command:

no errdisable detect cause gbic-invalid

And that disables the port-shutdown upon insertion of an unsupported transceiver.  At this point, your Catalyst should happily accept any good quality SFP you plug into it without giving any more back talk.

Network Upgrades Don't Have To Break The Bank

The moral of this story is simply that, in modern networking, there are virtually always alternatives for lowering your upgrade bills.  Whether it's using third-party products for simple tasks, or purchasing used hardware, moving towards software rather than hardware solutions, or even trading in your own depreciated equipment.

Hummingbird Networks is here to help our clients get the most out of modern technology, without going on a spending spree.  There are network builds to fit every business, budget, and future planning needs. 

Get a free trial of Hummingbird Networks Optical Transceivers to test in your network.

photo credit: Joaquin Villaverde Photography via photopin cc

photo credit: Skley via photopin cc

Topics: Optical Transceivers, Cisco

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