When I configure links between hosts in a Mininet environment running in WSL2-Ubuntu 20.04 but I get the error message: Error: Specified qdisc kind is unknown. Error: RTNETLINK answers: No such file or directory. I’m using Mininet version 2.3.0.

This is the network topology:

class NetworkTopo( Topo ):
    # Builds network topology
    def build( self, **_opts ):

        s1 = self.addSwitch ( 's1', failMode='standalone' )
        s2 = self.addSwitch ( 's2', failMode='standalone' )
        s3 = self.addSwitch ( 's3', failMode='standalone' )
        s4 = self.addSwitch ( 's4', failMode='standalone' )
        
        
        # Adding hosts
        d1 = self.addHost( 'd1')
        d2 = self.addHost( 'd2')
        d3 = self.addHost( 'd3')

             
        # Connecting hosts to switches
        for d, s in [ (s1, s2), (s1, s3), (d1, s2), (d2, s2), (d3, s3)]:
            # self.addLink( d, s , bw=5, delay='5ms', max_queue_size=1000, loss=10, use_htb=True)
            # self.addLink( d, s, cls=TCLink, bw=1)
            self.addLink( d, s, bw=1, use_htb=True)

topo = NetworkTopo()
    
net = Mininet( topo=topo, link=TCLink, controller=None )
net.start()

This is the error I get:

*** Error: Error: Specified qdisc kind is unknown.

*** Error: RTNETLINK answers: No such file or directory

Please assist me with solving the issue. Thank you.

I tried to recompile the WSL kernel follwoing this guide: https://alexkaouris.medium.com/run-your-own-kernel-with-wsl2-21e3143e014e

Some guides suggested that I install Mininet from source and I’ve already done that.