The warning message you encountered, “Cannot call Open vSwitch: ovsdb-server.service is not running,” suggests that the Open vSwitch service is not currently running on your system.
Open vSwitch (OVS) is a software switch commonly used in virtualized environments or software-defined networking setups. It provides advanced network features and can be integrated with Netplan for network configuration.
To resolve this issue, you have a few options:
Start the Open vSwitch service manually: You can try starting the OVS service by running the following command:
sudo systemctl start openvswitch-switchEnable and start the Open vSwitch service at boot time: If you want the Open vSwitch service to start automatically during system boot, execute these commands:
sudo systemctl enable openvswitch-switch sudo systemctl start openvswitch-switch
After starting or enabling the Open vSwitch service, you can reapply the Netplan configuration using sudo netplan apply again without encountering the warning message.
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private:
int numVertices;
vector adjacencyList;
public:
DirectedGraph(int n) : numVertices(n), adjacencyList(n) {}
void addEdge(int u, int v, int weight) {
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