Are there any affordable 10G copper SFP+ modules that should work with CRS317? The only sub 120$ module i could find is MikroTik S+RJ10 but it doesn't support jumbo frames so it doesn't count

You've nailed the issue on the head there.

Honestly, copper 10G adapters are a pain anyhow. Max 30m range and they have a tendency to overheat.

I've successfully used Cisco compatible modules from fs.com , but they cost a lot more than what you define as affordable.

You should really be using fiber by the time you hit 10gig.

/M

You should really be using fiber by the time you hit 10gig.

/M

I know, I'm mostly using DAC cables and LC uplinks because it's used as kind of "top-of-rack" switch interconnecting servers. Unfortunately one server has 10G copper onboard NIC. It'd be a bit of waste not to use it and our firewall will definitely struggle with 1500 frames on performance level, it hardly keeps up with 9k frames at full 10G already. On the other hand it just feels wrong to pay more for single sfp module than for entire switch lol...

It would be cheaper to buy a 10gig NIC that takes SFP+ modules for the server and then stick a single mode SFP+ in it.

It would also be more reliable

/M