I am having a strange issue. My connection will drop about 4-8 seconds, 5-7 times per hour. However, sometimes it will go 4 hours with no problems, but that is rare.
I have 2 Miktotik CCR2116-12G-4S+ (one is a spare, but they both do the exact thing). Both are updated to the latest firmware and router os
I am using this as a core router for a rack of servers. I have a /21 Public IP Range and that’s routed by my ISP to a /30 in my router.
So my Router has 1 x 10GB SFP+ in a WAN port with the /30
On the LAN side I have 1 x 10GB SFP+ in a LAN port with the /21
I turned off auto negotiation.
There is no NAT, just static route.
I have no firewall rules currently, it seemed worse when I enabled them, especially if I turned on connection tracking. I’ve tried to get this thing down to the very basics, just to see what is going on.
Packets per second generally sit between 5-24k/sec. I’ve seen bursts up to 500k but that doesn’t seem to affect connectivity
Bandwdith sits around 80-200Mb/sec
I have constant ping monitoring from the inside out to my ISP Gateway, and I see drops
From the outside I ping my ISP gateway, no drops
From the outside I ping my WAN IP, it also drops
The common point is the WAN port.
I am thinking a faulty SFP+ Module or my ISP seems to have an issue. ISP Says there is no problems and they’ve checked.
So my Router has 1 x 10GB SFP+ in a WAN port with the /30
On the LAN side I have 1 x 10GB SFP+ in a LAN port with the /21
I turned off auto negotiation.
There is no NAT, just static route.
I have no firewall rules currently, it seemed worse when I enabled them, especially if I turned on connection tracking. I’ve tried to get this thing down to the very basics, just to see what is going on.
I have a CCR2116 as my main router at home and have never experienced any similar issues in the two or so years it’s been installed. The first place I’d start troubleshooting is the logs - what, if anything, do they show when you’re experiencing these traffic drops? Next, you mention you have a “1 x 10 Gbps SFP+” for your WAN uplink and another for your LAN downlink. But what kind of SFP+ module? Single mode fiber? Multimode? DAC? 10GBASE-T copper? If 10GBASE-T, the transceiver could be overheating (they run very hot and that’s why I generally avoid them unless I have no choice).
I know you said your configuration is fairly simple, with just a transit /30 on the WAN interface and your /21 on the LAN interface, but I’d recommend posting a sanitized version of your config so we can confirm there’s nothing suspect in it. Also, I’d turn autonegotiation back on. You also mentioned that a second CCR2116 acts as a backup - can you elaborate on how you have that set up?