KTHW Provisioning Compute Resources

According to instructions:

Runs the below command on all nodes to allow for network forwarding in IP Tables. This is required for kubernetes networking to function correctly.

sysctl net.bridge.bridge-nf-call-iptables=1

I am getting following error:
sysctl: cannot stat /proc/sys/net/bridge/bridge-nf-call-iptables: No such file or directory

Hello andrzej,
please check the following:

    $ modprobe br_netfilter
    $ sysctl -p /etc/sysctl.conf

It works now. Actually the issue was only on master nodes and lb. Can you give some more explanation about those two commands ?