I have a issue with my CRS109-8G
Ether1 seems to have an issue negotiating and staying that way.
I have it set to Auto Negotiation and it connects and links at 1gbps, but every hour or so it loses its link and re-negotiates, as I run pppoe over a vlan attached to ether1 I get disconnection after disconnection. If I disable auto negotiation and fix to 1gbps it will never get a link even though it negotiates at 1gbps on Auto Negotiate.
Up until recently had a VDSL connection I was running full bridge, on the VDSL modem I had the exact same issue however as VDSL was only 50mb/s down the workaround was to disable auto negotation and advertise at 100mb/s and the connection was solid. But as ive just moved to Fibre which speed is more than 100mbps its just not suitable.
Any ideas why the Router wil Auto Negotiate at 1gbps but wont when auto negotiation is disabled?
FYI ive tried multiple cat6 cables, its less than 1M distance from the fibre ONT, I have no access to the ONT but it had the same issue with the Draytek VDSL mode, im pretty convinced its my router at blame.