MX 105 Stack

[SSAS1]

Just within the last month our internet has slowed by 75%. It worked fine up until a month ago. Using a MX 105 that was suggest to us by Meraki to fit our needs. Using a 2 gig SFP only getting 30 to 50 Mbps download. 900 + uploads. It looks like our Trunk ports will only handle MTU of 1500. it needs to be 9000. Does anyone know if we need to MX 250?

[Raphael_L]

Have you opened a ticket to Support ?

What does the stats of the device say ? CPU , memory , client count , number of sessions and so on. They should be able to tell if you are having a hardware bottleneck ( which I really doubt )

What firmware are you running ?

[SSAS1]

We have been working with support sense 09-25-2023. They don't know what is going on. Lots of testing. event sent us a new MX 105. Current version: MX 18.107.4. CPU not sure where to look, I have looked all over the dashboard. 1255 clients.

[aleabrahao]

Check the Recommended use case.

https://documentation.meraki.com/MX/MX_Overviews_and_Specifications/MX95%2F%2F105_Datasheet

[SSAS1]

Thanks for the info. We were sold a unit designed by Meraki sales to fit our needs but it seems as through we were mistaken. So sad. Wish I would have stayed with Watchguard.

[ww^]

It just went bad from one day to another? Nothing changed like fw version?

What is a 2gig sfp? Like a 1Gb up/down?

[Ryan_Miles]

A 2 gig SPF? It appears you have a 10G bps transceiver in WAN 1 and a 1 Gbps transceiver in WAN 2 (physical port 4). And a 10 Gbps transceiver on LAN port 9.

How are you measuring throughput? From what source to what destination? Using what tool or website?

I just ran three speed tests using the MX tools page and got more than 1 Gbps each time. Even outside of these tests watching ongoing usage I'm regularly seeing 300-600 Mbps.

I also see in the event log almost everyday you have primary WAN link transitions between WAN 1 & 2 which you cause me to investigate the health of those links/carriers.

[kj4qwt]

Thank you Ryan,

Our issue is not on the upload side but rather the download. Is there a way to test from the Meraki dashboard to the MX105?

[Ryan_Miles]

The dashboard throughput test is a download test not upload.

[SSAS1]

You will see my System Admin chiming in on this thread. We have been testing using our backup WAN2. Our carrier is solid. CrownCastle has been onsite and verified the circuit.

[Ryan_Miles]

Has all the cabling been swapped, transceivers swapped, what is the carrier handoff device? While the provider has verified their link there's no denying you're having many uplink failover events. But that might be a secondary issue.

What still needs to be addressed here is how are you measuring throughput?

Prior to the slow down a month ago what firewall was in use? The MX105 appears to be a new deployment. And was the MX105 working ok for some period of time?

[kj4qwt]

Hello Ryan,

The reason you are seeing excessive drops on our WAN1 interface is due to repeated testing with Meraki support requiring us to disonnect the fiber.

Our throughput is measured using a custom speedtest site from our ISP.

The speedtest is RFC Compliant. I'm not sure of what the RFC number is right now, I'm working on getting that information shortly.

Meraki support had shipped us an identical RMA with suspicion that it could be the previous MX105. However, the new MX105 is no different from the previous one.

We think that it could be a software update that is responsible for the degredation in router performance because we didn't notice any significant changes until the beginning of September of this year.

[kj4qwt]

I must also mention that we've tested the speeds using a MacBook Pro as a router sharing it's internet connection from an SFP+ Fiber NIC card to a GigaBit Copper Ethernet connection to a test computer. The upload and download performance outshined the MX105.

[ChristophJ]

Hi SSAS,

Is there maybe some traffic shaping in effect that is configured on your MX? A low download like that seems weird, especially because your upload is 900+ Mbps.
What does the uplink configuration under Security & SD-WAN in SD-WAN & traffic shaping say?

What kind of SFP module are you using? Can you tell us the module name? I haven't seen a 2 gig SFP from Meraki.

I run a MX105 and I can get to 1 Gbit/s up and download without any issues with IPS enabled. Probably more would be possible too, but my uplink is just 1 Gig.
Since when are you running into this issue? Was there a firmware update and it started afterwards? Were there config changes somewhere in the network?

Also if the MX is having a hardware bottleneck that should be visible under Organization -> Summary Report and then select the Appliance network. The utilization will be visible in the bottom left corner.

Otherwise support will be able to tell if there is a hardware bottleneck. They have access to more data about the appliance.

[kj4qwt]

Hello ChristohpJ,

I've attatched some screenshots of your requested information on the MX105.

The SFP+ Fiber Module is 10G.