A known issue with the default provisioning of our Catalyst GPU units can result in network routing failure. If LAN1 and LANB were both used at one point to connect to network, it will result in conflicting routes in the network stack and cause connection issues.
The simplest remedy is to decrease the routing priority of the interface you intend to use long term. Note that a lower routing priority means it has higher precedence in the routing table. This can be done from the Network tab of the Detect Viewer.
If you require the ability to swap between LAN1 and LANB frequently, changing the priority can be cumbersome. In these cases the system files can be modified to remove the extra step of routing priority.
- SSH onto the Catalyst GPU unit
sudo rm /etc/netplan/00-netplan.yamlto remove the incorrectly configured netplan file.sudo netplan applyto apply the corrected netplan.
This should allow fast swapping between LAN1 and LANB without issue.