Add README for multus and sriov

Signed-off-by: Saikrishna Edupuganti <saikrishna.edupuganti@intel.com>

clr-k8s-examples/9-multi-network/README.md

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+# Multi-Network
+
+## Daemonset
+
+We launch a `Daemonset` with an `initContainer` which sets up the CNI
+directories on the host with the necessary binaries and configuration files.
+
+### Customization
+
+Replace `flannel` configuration in the delegates section with contents of your
+default network's cni configuration in [multus-conf.yaml](clr-k8s-examples/9-multi-network/multus-conf.yaml).
+The device plugin, will discover any SR-IOV enabled devices on the host as per the
+configuration in [sriov-conf.yaml](clr-k8s-examples/9-multi-network/sriov-conf.yaml).
+
+> NOTE: This assumes homogenous nodes in the cluster
+
+### Install
+
+To install and configure `multus-cni` on all nodes, along with `sriov-cni` and
+`sriov-network-device-plugin` :
+
+```bash
+kubectl apply -f .
+kubectl get nodes -o json | jq '.items[].status.allocatable' # should list "intel.com/sriov"
+```
+
+## Tests
+
+### Default only
+
+To test if default connectivity is working
+
+```bash
+kubectl apply -f test/pod.yaml
+kubectl exec test -- ip a        # should see one interface only
+```
+
+### Bridge
+
+To test multus with second interface created by `bridge` plugin
+
+```bash
+kubectl apply -f test/bridge
+kubectl exec test-bridge -- ip a # should see two interfaces
+ip a show mynet                  # bridge created if it doesnt exist already
+```
+
+### SR-IOV
+
+To test multus with second interface created by `sriov` plugin
+
+```bash
+kubectl apply -f test/sriov
+kubectl exec test-sriov -- ip a  # second interface is a VF
+```