New NIC card - Network stops working

Creator1995

New Member
Aug 25, 2021
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On one of our Proxmox node (pve14) NIC card stopped working entirely.
We purchased a new NIC card and I changed the configuration in "/etc/network/interfaces" to use a new rj45 port under the name enp7s0. (picture1.jpg).
After server restart "ip a" command is showing that everything should be fine, vmbr0 interface is up and running but for some reason, we are unable to ping nor establish any communication with the LAN network. (picture2.jpg).

Note: loopback interface is working correctly, we are able to ping the 10.1.10.14 address.
Ping tests: (picture3.jpg)
Also, routes should be fine. (picture4.jpg)

Can someone please help me with this? What am I missing here?

pveversion -v output: (picture5.jpg)
 

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