Solved: Re: Basic Speed/Duplex functionality of device ports - Page 3

707eric · ‎10-26-2022

We currently have multiple MX105's and MS125's. All the 10GB SFP+ optical ports lack the ability to manually set the port to 10GB Full. The only option is auto-negotiate but you can't auto-negotiate optical links. This becomes major issue if network devices other than Meraki are added to the network. Meraki's answer seems to be "Don't use any non-Meraki devices" yet my solution is looking like, "Don't use any Meraki devices"

Does anyone know if there is any places to fix this most basic feature on the 10Gb devices?

707eric · ‎10-27-2022

Correct 10Gb auto-negotiate is only supported with twisted pair its not supported on optic

This also means 10Gb optic ports are not supposed to support 10GB auto-negotiate and only support 10GB Full Duplex. There is a difference between the two.

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But Meraki doesn't adhere to that. So if a person uses a device like Cisco Catalyst that does adhere to the standard and won't allow a 10gb optical port be set to auto-negotiate you run into a port speed/duplex mismatch.

The problem here is the Meraki don't adhere to standard like other enterprise gear.

CMR · ‎10-27-2022

@707eric see my post above with Catalyst 3850s set to auto on the Ten Gig port and working perfectly.

If my answer solves your problem please click Accept as Solution so others can benefit from it.

aleabrahao · ‎10-27-2022

I'm pretty sure that you don't need to set It manually.

But ok.

I am not a Cisco employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.

Please, if this post was useful, leave your kudos and mark it as solved.

aleabrahao · ‎10-27-2022

My switch is connected to a Fortinet with a 10GB optical in auto negotiate.

I am not a Cisco employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.

Please, if this post was useful, leave your kudos and mark it as solved.

707eric · ‎10-27-2022

Fortinet doesn't follow the standard. They clear state they support auto-negotiate.

aleabrahao · ‎10-27-2022

🙄

I am not a Cisco employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.

Please, if this post was useful, leave your kudos and mark it as solved.

aleabrahao · ‎10-28-2022

I don't want to discuss this further, but I'll share another image (it's the last time):

On the other side, we have a Juniper router.

I know the standards and I know it's the most basic feature. But it really doesn't seem like a Meraki issue. I really appreciate it if you share with us when you resolve this issue.

I am not a Cisco employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.

Please, if this post was useful, leave your kudos and mark it as solved.

ww^ · ‎10-27-2022

How would a mismatch be possible if 10Gb sfp+ can only run 10Gb full duplex regardless

707eric · ‎10-27-2022

I don't know10GB SFP+ isn't supposed to run at 1GB either but they do. And the SFP+ are 10gb because if I use them to connect two Meraki's they run at 10Gb.

707eric · ‎10-27-2022

Except they do negotiate do, at least Meraki's do.

BlakeRichardson · ‎10-27-2022

I feel like we are flogging a dead horse here, as mentioned 10Gb fibre SFP+ modules only work at 10Gb. If you want to set all of your port speeds manually then maybe Meraki isn't the brand for you. Meraki has never said don't use other brand hardware / mix hardware I have no idea where you read that as it's simply not true.

Why someone would want to waste time manually setting port speeds is beyond me.

If you found this post helpful, please give it Kudos. If my answer solves your problem, please click Accept as Solution so others can benefit from it.

GreenMan · ‎10-28-2022

You mention that your fibre links are not stable. I believe speed and duplex is likely to be a red herring here and that other causes for your issues should be looked at. Can you advise which optical SFPs you are using, at both ends, the specification of the fibre you're using (e.g. multi-mode 50/125u OM3) and the length of the fibre run(s)?

Did you also check that your patch leads match the specification of the structured cabling?

707eric · ‎10-28-2022

We have already troubleshoot all of this with Meraki support fiber and SFP are all fine. The connection works fine when Meraki's are not part of the equation.

What get's me is in multiple firmware release they acknowledge the issue:

Updated the range of port settings available for MX95 appliances on the device local status page.

Added more speed and duplex configuration options for 2.5Gbps-capable ports on the device local status page.

Yet they say:

Hello, Setting 10G through the Dashboard manually is not currently supported. You can submit this as a feature request using the "Give your feedback" button at the bottom of Dashboard pages. These requests are regularly reviewed by our developers and help shape the future of our products.

When the issue exist locally and from the dashboard.

CMR · ‎10-28-2022

@707eric those updates are not regarding 10Gb fibre connections, they are for Cu ports that can negotiate speeds in between 1Gb and 10Gb.

Can you confirm that you have tested with both the Cisco Catalyst and Meraki set to auto negotiate? i.e. the same as we have been using for years with OM3 LC-LC patch leads and OM3 LC terminated structural fibre.

If my answer solves your problem please click Accept as Solution so others can benefit from it.

joey.debra · ‎11-09-2022

What is all this fuss about?
If you have an SFP+ port and you insert an SFP+ fiber module it runs at 10 Gbps period. If you insert an 1 Gbps SFP it will run at 1 Gbps. Unless you are using some weird dual speed SFP+ modules you shouldn't have any issue.

I guess the only issue you could have is with copper SFP's but since Meraki itself only sells 1Gbps variants one would assume 10 Gbps over copper SFP is not officially supported.