The patch command:
```
oc patch network.operator cluster -p '{"spec":{"defaultNetwork":{"ovnKubernetesConfig":{"gatewayConfig":{"ipForwarding": "Global"}}}}}
```
From the docs: https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html/networking/networking-operators#nw-cno-enable-ip-forwarding_cluster-network-operator 
does not work.

The correct command is:
``` 
oc patch network.operator cluster  -p '{"spec":{"defaultNetwork":{"ovnKubernetesConfig":{"gatewayConfig":{"ipForwarding": "Global"}}}}}' --type=merge 
```
Note: The --type and missing quotation at the end

Without the --type you will receive:
```
oc patch network.operator cluster  -p '{"spec":{"defaultNetwork":{"ovnKubernetesConfig":{"gatewayConfig":{"ipForwarding": "Global"}}}}}' 
error: application/strategic-merge-patch+json is not supported by operator.openshift.io/v1, Kind=Network: the body of the request was in an unknown format - accepted media types include: application/json-patch+json, application/merge-patch+json, application/apply-patch+yaml
```

    1.
    2.
    3.
    

        Cannot execute proposed command:
```
oc patch network.operator cluster -p '{"spec":{"defaultNetwork":{"ovnKubernetesConfig":{"gatewayConfig":{"ipForwarding": "Global"}}}}}quote> 
```

Patch command should succeed.
Using the following patch command does succeed:
```
oc patch network.operator cluster --type='merge' -p '{"spec":{"defaultNetwork":{"ovnKubernetesConfig":{"gatewayConfig":{"ipForwarding": "Global"}}}}}'
```

```
$ oc get network.operator/cluster -ojson | jq '.spec.defaultNetwork.ovnKubernetesConfig.gatewayConfig'
{
  "ipv4": {},
  "ipv6": {},
  "routingViaHost": false
}

$ oc patch network.operator cluster  -p '{"spec":{"defaultNetwork":{"ovnKubernetesConfig":{"gatewayConfig":{"ipForwarding": "Global"}}}}}' --type=merge
network.operator.openshift.io/cluster patched

$ oc get network.operator/cluster -ojson | jq '.spec.defaultNetwork.ovnKubernetesConfig.gatewayConfig'
{
  "ipForwarding": "Global",
  "ipv4": {},
  "ipv6": {},
  "routingViaHost": false
}
```    

4.18 docs: https://docs.redhat.com/en/documentation/openshift_container_platform/4.18/html/networking/networking-operators#nw-cno-enable-ip-forwarding_cluster-network-operator

4.17 docs: https://docs.redhat.com/en/documentation/openshift_container_platform/4.17/html/networking/networking-operators#nw-cno-enable-ip-forwarding_cluster-network-operator

4.16 docs: https://docs.redhat.com/en/documentation/openshift_container_platform/4.16/html/networking/networking-operators#nw-cno-enable-ip-forwarding_cluster-network-operator