there are a lot of pci id's with i219v what exact device is it? you can use lspci when booting a live/rescue linux   in general i'd suggest using 1.04b loader with my last extra/extra2 from here https://xpenology.com/forum/topic/28321-driver-extension-jun-103b104b-for-dsm623-for-918-3615xs-3617xs/   it has e1000e driver 3.6.0         0d4c  Ethernet Connection (11) I219-LM     0d4d  Ethernet Connection (11) I219-V     0d4e  Ethernet Connection