When our ISP changes their MTU to 1500 on the customer handoff interface of the NID, errors start coming up. ... View more

Sorry cmr for not answering your last question.   All of our clients are using an MTU size of 1500. ... View more

Sorry cmr, I'm confused.   Are you saying that it matters to have the MTU size match between endpoints, but not between networking equipment?   When we plug in directly into an available copper Ethernet port on our MX105, we do get faster speeds than compared to going through our 10G fiber LAN interface. Like in the 200MB/s range for download and the 900MB/s range for the upload.   We get the same results when completely disconnecting our LAN network from the MX105 and just using one computer on an available copper ethernet interface on our MX105. ... View more

Hello cmr,   The reason for the large MTU size is because we are using trunk interfaces between our switches to more efficiently handle large volumes of traffic, especially when our MX105 is being used for inter-vlan routing.   Normally it's standard to have trunk interfaces have an MTU in the 9000's range for this reason.   Are you suggesting that we need to drop our MTU on our switches and ISP NID down to 1500? ... View more

The one thing that we cannot see are the counters that represent the Giant Frames on interfaces 1 and 9 SFP+ 10G Fiber interfaces on the MX105.   I think the issue here is too many resends of packets because of MTU size mismatches between our LAN and the Providers NID networking equimpment and the MX105.   Our providers customer fiber interface facing our MX105 has it's MTU set to 9000 and our main switch is set to 9578.   My understanding is that the MX105 only supports an MTU of 1500 MAX, even if the LAN interface is configured as a trunk port. ... View more

Sorry. I forgot to mention that the two different fiber modules were used as a demonstration for Meraki support to rule out that optics overload is not to blame for the close proximity between our providers NID and the MX105. ... View more

Hello ChristohpJ,   I've attatched some screenshots of your requested information on the MX105.   The SFP+ Fiber Module is 10G.     ... View more

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. ... View more

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. ... View more

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? ... View more