# Flannel * Flannel configuration file should have been created there ```ShellSession cat /run/flannel/subnet.env FLANNEL_NETWORK=10.233.0.0/18 FLANNEL_SUBNET=10.233.16.1/24 FLANNEL_MTU=1450 FLANNEL_IPMASQ=false ``` * Check if the network interface has been created ```ShellSession ip a show dev flannel.1 4: flannel.1: mtu 1450 qdisc noqueue state UNKNOWN group default link/ether e2:f3:a7:0f:bf:cb brd ff:ff:ff:ff:ff:ff inet 10.233.16.0/18 scope global flannel.1 valid_lft forever preferred_lft forever inet6 fe80::e0f3:a7ff:fe0f:bfcb/64 scope link valid_lft forever preferred_lft forever ``` * Try to run a container and check its ip address ```ShellSession kubectl run test --image=busybox --command -- tail -f /dev/null replicationcontroller "test" created kubectl describe po test-34ozs | grep ^IP IP: 10.233.16.2 ``` ```ShellSession kubectl exec test-34ozs -- ip a show dev eth0 8: eth0@if9: mtu 1450 qdisc noqueue link/ether 02:42:0a:e9:2b:03 brd ff:ff:ff:ff:ff:ff inet 10.233.16.2/24 scope global eth0 valid_lft forever preferred_lft forever inet6 fe80::42:aff:fee9:2b03/64 scope link tentative flags 08 valid_lft forever preferred_lft forever ```