This article discusses a common problem and mitigation techniques with certain supported GBICs or SFPs optical transceiver modules on a Catalyst switch. Please keep in mind the following points before considering this as a hardware issue with the SFP, sub-module CNM or backplane.

Verify compatibility between the SFP and the switch, sub-module and software version. You can refer these compatibility matrix documents. Some SPFs need configuration and actions to be able to work in a Catalyst switch mostly when they are manufactured by third-party. Try following actions:. The recommended version on cisco. Following documents can be referred for this. Upgrade guide Software Download page. Skip to content Skip to footer.

Available Languages. Download Options. Updated: December 15, Contents Introduction. Introduction This article discusses a common problem and mitigation techniques with certain supported GBICs or SFPs optical transceiver modules on a Catalyst switch. Was this Document Helpful?

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Yes No Feedback. Related Cisco Community Discussions.A Gossamer Threads company. Login Register Help. Mailing List Archive GT. Unsupported SFP on Cisco Hello Folks, I have a peculiar problem. I have followed postings in the forum and I believe your experience with Cisco networks will help answer my question.

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. My worry is, is it safe to do this. Is it likely I will have problems in future with the switch. Am I likely to experience abnormal data transfer on the network in future?

The only problem you're likely to have is with your wallet if you buy Cisco branded optics.

Unsupported GBIC (SFP) in sub-module of Catalyst 3850 Switch – Mitigation Techniques

SeniorJ at bennettjones. I've interpreted the warning as Cisco removing their support and liability requirements for the optics themselves, "My SFP doesn't work, help". I wouldn't expect any data issues whatsoever. They'll continue to support the switch as normal for non-gbic issues. I've been running service unsupported-transceiver for many years with no issues. As long as it's [eventually] recognized, it's good.

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Thank you all folks for your quick responses. Am grateful :.

Forcing A Cisco Catalyst Switch To Use 3rd Party SFP Modules

I can breathe a sigh of relief now.Many companies are seeking for Cisco SFP alternatives to help cut down the costs on these expensive modules.

A frequent customer problem with Cisco's new line of Catalyst switches is that they do not support 3rd party non-Cisco SFPs - or at least they do not seem to If you've just replaced your network switches and tried using any 3rd party SFPs to connect your network backbone, you'll quickly stumble across an error similar to the following:.

unsupported sfp cisco 2960

When a SFP is inserted into a switch's GBIC port, the switch immediately reads a number of values from the SFP and if it doesn't like what it sees, it throws the above error message and disables the port. Despite the error displayed, which leaves no hope for a solution, keep smiling as you're about to be given one.

When entering the service unsupported-transceiver command, the switch will automatically throw a warning message as a last hope to prevent the usage of a 3rd party SFP.

Since the service unsupported-transceiver is undocumented, if you try searching for the command with the usual method? The same applies for the no errdisable detect cause gbic-invalid command. In fact if the Catalyst switch is running IOS There are mixed feelings about this. We certainly do not recommend using non-Cisco SFP's in production environments, however in a lab environment, its most probably a cheap way out. Back to Cisco Switches Section.

Troubleshooting And Repairing Cisco 2960 Switch

Deal with bandwidth spikes Free Download. Web Vulnerability Scanner Free Download. 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.

Yes, starting from Articles To Read Next:. DHCP SnoopingNetwork Engineering Stack Exchange is a question and answer site for network engineers. It only takes a minute to sign up.

Connect and share knowledge within a single location that is structured and easy to search. I recently came across an issue while setting up a stack to replace an older M switch setup.

My plan was to use the SFP modules on the front end of the switches to uplink straight to the core rather than to a bottom M and a Top M that were uplinked to Core1 and Core2.

We purchased non-cisco SFP's Cisco's are much more expensive and installed them. It's outputting that they are not compatible which is confusing considering the SFP is an international standard. In order to prevent them from defaulting to err-disable I had to enter the following commands in config mode.

unsupported sfp cisco 2960

I then configured the SFP interface to a management vlan, connected a laptop to it by changing the laptop's IP address and confirmed that the SFP does indeed take traffic. Hope this helps! Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?

Learn more. Asked 7 years ago. Active 3 years, 6 months ago. Viewed 27k times.

Improve this question. Ryan Foley 5, 4 4 gold badges 20 20 silver badges 42 42 bronze badges. This is not a recommended config, but some people "get away" with doing this. In config mode, try service internal and service unsupported-transceiver. Add a comment. Active Oldest Votes. Router config service internal Router config no errdisable detect cause gbic-invalid Router config service unsupported-transceiver I then configured the SFP interface to a management vlan, connected a laptop to it by changing the laptop's IP address and confirmed that the SFP does indeed take traffic.

Improve this answer. Mike Pennington For those of you still having a problem, consider upgrading to IOS Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.

The Overflow Blog.Post a Comment. August 09, Cisco Catalyst X series switches are fixed-configuration and stackable gigabit ethernet layer 2 and layer 3 access switches, and include configurations to fit in any enterprise network. Here I will mainly introduce the knowledge of X series switches and compatible SFP modules for it. The Cisco Catalyst XR switch models have the following additional capabilities in addition to the features in the X models:.

Following are the notable hardware components present only in LAN Base switches:.

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The feature set is bound to the hardware model type and cannot be changed. Unknown July 25, at AM. What are the Cisco Catalyst Series Switches? The Cisco Catalyst Series Switches are the next generation of enterprise-class stackable access-layer switches that are part of the new Cisco Catalyst Family.

These switches also support full IEEE In addition, the Cisco Catalyst based models support a variety of uplink modules for both copper and fiber uplink support.

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These models add even more flexibility to the interface choices that you can make in a single Cisco Catalyst Switch or in a stack of Cisco Catalyst Switches. Read more. August 21, I have set up Cisco switches previously via the hyperterminal and been able to get them configured and operating, but I have limited knowledge of the tools and processes.

I have good feedback on the 48 ports, but I can not get the SFP modules to ether be recognized or show any activity on the S. The unmanaged switch I have the fiber connected too, is indicating a network connection and activity, but the S is not indicating any connection on the SFP modules.

When dealing with add on SFP's, you can type "show inventory" to see if they are recognized by the system at all. It will also show the model and serial number, as well as linecards, power supplies, etc. I've run into some issues with 3rd party SFP's before, and they typically won't come up if they are not recognized as a Cisco branded version. If you issue a "show interface" on the interface you are having problems with, and the status is errdisabled, it may be because you have used an SFP that isn't recognized.

There is a hidden command you can use, "service unsupported-transceiver" which, in conjunction with "no errdisable detect cause gbic-invalid" and "errdisable recovery cause gbic-invalid", allows you to use the SFP. I will note that you should use Cisco branded SFP's whenever possible, as off branded ones are most of the time less reliable and don't enable the full options that Cisco branded ones would.

I have included a couple of pictures from the commands you forwarded, but I am unclear I see any issues. I see you posted your config above, and after reading a bit more here, you're dealing with layers of the OSI model at the moment, so let's focus on that. For your unmanaged switch, are you using the same type of SFP? Sometimes you need to use the same on both sides for a link to come up. If that is not the problem, I would say look over your running-configuration for port It does not appear to have any configuration added to it so far.

unsupported sfp cisco 2960

If every device on your unmanaged switch will be on the same vlan, you can turn port 49 into 'switchport mode access' and 'switchport access vlan 1' as well as 'spanning-tree portfast'. If not all devices will be on vlan 1 on your unmanaged device, you can try 'switchport mode trunk'. This will allow vlans across by default you can limit this too. Make sure that the unmanaged switch is set to trunk mode as well, and allowing the vlans you want across. This varies from ios version to ios version, but it will show unicast, multicast, broadcast, packets below the MTU or above runts and giants.

Hi Patrick. I've not run into this situation and honestly couldn't answer without making a guess. Leo replied to your post and sent a link to various SFP's that may work. Good luck! Level of dBm means no signal in there.

unsupported sfp cisco 2960

Even with signal, the SFP can be disconnected or not passing traffic. But first of all is to have light on your end. The SG is essentially unmannaged at this point, so telling the port on the S to not negotiate the speed was exactly the thing that allowed this connection to work. There were other times it worked, but it took random amounts of time for this to occur Never right away like it should.

I'm assuiming because both ends were negotiating the entire time, neither came up with an agreement? IDK, but this fixed it. Thank you very much! Buy or Renew. Find A Community. Cisco Community.Network Engineering Stack Exchange is a question and answer site for network engineers.

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But it didn't help actually. I couldn't turn on GBIC ports. It always shows "status down, protocol down". I'm afraid the real solution is to use either Cisco transceivers or third-party transceivers - from reputable vendors- that are specifically "tagged" to be used on Cisco switches. Using random transceivers will only cause troubles and the time you will loose will vastly overcome the economy made on the hardware. You can use this compatibility matrix to check which transceiver are compatible with your switch.

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The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?

Learn more. How to connect 3rd party SFP to the cisco switch?

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Ask Question. Asked 2 years, 8 months ago. Active 2 years, 7 months ago. Viewed 6k times. I have been experiencing with the proplem for two days.

Which steps should i follow? Thanks in advance. Improve this question. Simral Abdurahim Simral Abdurahim 1 1 silver badge 5 5 bronze badges.

There is nothing you can do about this. The 3rd party SFP has to be tagged for Cisco, otherwise it's a no go. Add a comment. Active Oldest Votes.