Hello,
I'm experiencing a peculiar issue on one of my networks and am running out of ideas.
We have a 10GB primary link connected to an MX450 appliance. It functions correctly 99% of the time, but 2-3 times a week, usually during peak traffic, the connection stalls. It doesn't stop entirely; I can still run speed tests and observe a significant drop in uplink traffic on the Meraki dashboard for a minute or two before it jumps back up and resumes normal operation. During these instances, speed tests show a drastic reduction to kbps speeds on both ethernet and wireless connections.
This issue only occurs when connected to the 10GB primary link. The backup WAN has been in use for over a month without any problems.
Although the disruption is brief, it's highly disruptive as calls drop and most of our services are web-based.
Here's what we've tried so far:
The ISP performed a fibre light test, which checked out fine.
Verified uptime on all Meraki devices, which also checked out fine.
Replaced the fibre cable and SFP adapters between the MX and ASR (tried both single-mode and multimode fibre with Meraki Gbics).
Set link negotiation settings on the MX and ASR to 1/10GB auto.
Set up pings to:
Firewall LAN Address
Firewall WAN address
Router WAN address
ISP edge port
Known address on the same ISP
GoogleNone of these pings showed any packet loss during the issue.
The router is a Cisco ASR920.
Any thoughts?
Thanks,
R.
