netmetal ac2 crash with sfp

RouterOS General
1

Hello
I’ve a netmal ac2 with S-RJ01 on the stp port

I’ve bridged the sfp port .

The ethernet 1 is connected to poe injector and to a css 326 switch

When I connect for example a pc on the S-RJ01 the netmetal crashes and I’ve to unplug and replug to reach it again with winbox. Once i could read in the logs something like
log: excessive or late collision, link duplex mismatch, but only once.
I’ve the 6.47.6 version on the netmetal and 2.12 on swos css 236 switch

Interface settings in the images
Can you help me?
Thank you
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2

SFP can draw quite some power. Depending on length and quality of UTP cable between power injector and netmetal it could mean that netmetal draws power high enough to drop voltage below minimum accepted. If you’re using supplied power adapter (48V 0.95A), then this shouldn’t really happen, but who knows.
Test this hypothesis by powering netmetal via power jack.

3

thank you
I’ll try and let you know thank you