Posting just in case someone else has the same problem as me. Problem description: trying to add a gateway outside IP subnet fails*: *my IP configuration (OVH failover IP - according to OVH failove...
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Posting just in case someone else has the same problem as me. Problem description: trying to add a gateway outside IP subnet fails*: *my IP configuration (OVH failover IP - according to OVH failover IP configuration guide): IP address (failover IP): 53.X.Y.Z netmask: 255.255.255.255 gateway: 147.A.B.254 [where 147.A.B.C is an address of your dedicated server] When trying to add/modify above IP configuration: using https://vcenter.my.domain:5480/#/ui/networking results in "Unable to validate the specified IPv4 configuration." using DCUI of vcenter server: results in gateway not being saved at all using "/opt/vmware/share/vami/vami_config_net" inside vcenter server (ssh connection) results in gateway not being saved at all RESOLUTION: 1. connect to vcenter server via ssh 2. vim /etc/systemd/network/10-eth0.network modify the file as shown below: [Match] Name=eth0 [Address] Address=53.X.Y.Z/32 Peer=147.A.B.254/32 LinkLocalAddressing=no DHCP=no [Route] Gateway=147.A.B.254 Destination=0.0.0.0/0 3. save file [:wq <enter> for vim] 4. ifdown eth0 ; ifup eth0 <enter> 5. Configuration is successfully saved. You can check it using: /opt/vmware/share/vami/vami_config_net or via DCUI or via vcenter server management (https://vcenter.my.domain:5480/#/ui/networking) Do not attempt to change configuration through DCUI now - or it'll be overwritten (by no gateway at all).
