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March 30, 2011

Unlocking CISCO devices to work with “unsupported” SFP

Filed under: Uncategorized — Tags: , , — admin @ 1:41 pm

In cisco equipment there is one very irritating problem – it works only with “cisco” SFPs.

Well actually cisco is not manufacturing sfps so basically there is just some check going on inside the router/switch. It can drive you crazy if your only cisco sfp dies and you have nothing except for some normal 3rd party sfp (which is by cisco standard not compatible).

Well there is a way how to go around this. In ios command line write the following :

service unsupported-transceiver

This will cause this to come up your screen:

Warning: When Cisco determines that a fault or defect can be traced to
the use of third-party transceivers installed by a customer or reseller,
then, at Cisco’s discretion, Cisco may withhold support under warranty or
a Cisco support program. In the course of providing support for a Cisco
networking product Cisco may require that the end user install Cisco
transceivers if Cisco determines that removing third-party parts will
assist Cisco in diagnosing the cause of a support issue.

if that did not scared you off just continue with the following:

no errdisable detect cause gbic-invalid

There are some cases that the sfp is not working properly but the odds are something like 100:1

As a side note Huawei equipment does not block any vendor’s sfp but has also list of supported modules which is rather to good idea to read because the “non-supported” sfps have usually some issues.


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