Basic Speed/Duplex functionality of device ports

[707eric]

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?

[CMR]

@joey.debra it appears that @707eric has an unspecified reliability issue with either a Meraki MX105 or an MS125 when connecting to an unspecified Cisco Catalyst switch using a 10Gb unspecified fibre optic over unspecified fibres. He believes that the ability to manually set 10Gb Full duplex on the SFP+ port in the dashboard will solve the issue, even though many of us here aren't so sure.

@707eric can you please fill in the gaps above so we can help more?

[joey.debra]

Well for one: ports in 1 Gbps are higher are always full duplex.
And secondly the only SFP port types on Cisco switches where you can/have to set speeds is on Nexus switches that run multiple speeds.

There simply is no negotiation between SFP's on both sides. It just sends the traffic over the TX fiberoptic and receives on the RX fiberoptic.

I would start suspecting there is simply a wrong type of SFP in use in one or both of the switches or the fibercable is not up to spec for the distance/speed.

Both SFP modules at both ends must be of the same standard. A 10GBASE-SR will not successfully decode data coming from a 10GBASE-BX40 SFP+. First you need to be sure your fiber is okay and the correct modules are used at both ends.

[CMR]

@joey.debra I am in complete agreement with you. I suspect @707eric has a Nexus switch with perhaps an SFP28 port or optic and that is where the issue lies. Either that or SR-LR or LRM or OM2 mixed with OM2 or OM4 or somesuch fun and games...

[707eric · Accepted solution]

"Hi Eric,

I just wanted to let you know that we are still investigating this issue, and I will provide you with an update soon. Thank you,"

Nah, Meraki acknowledged the issue and investigating it now.

The gaps were there because those variables were not the issue. No reason to spend time on things that weren't the issue.