instruction: Create a comprehensive Dockerfile for networking applications with best practices
output: ```dockerfile
  from NetOps to Docker network commands
  are as follows:VLAN: 10, Subnet: 172.16.80.0/24, Gateway: 172.16.80.1--subnet=172.16.80.0/24 --gateway=172.16.80.1 -o parent=eth0.10VLAN: 20, IP subnet: 172.16.50.0/22, Gateway: 172.16.50.1--subnet=172.16.50.0/22 --gateway=172.16.50.1 -o parent=eth0.20VLAN: 30, Subnet: 10.1.100.0/16, Gateway: 10.1.100.1--subnet=10.1.100.0/16 --gateway=10.1.100.1 -o parent=eth0.30IPvlan L3 mode exampleIPvlan will require routes to be distributed to each endpoint. The driver only
  builds the IPvlan L3 mode port and attaches the container to the interface. Route
  distribution throughout a cluster is beyond the initial implementation of this
  single host scoped driver. In L3 mode, the Docker host is very similar to a
  router starting new networks in the container. They are on networks that the
  upstream network will not know about without route distribution. For those
  curious how IPvlan L3 will fit into container networking, see the following
  examples.
  IPvlan L3 mode drops all broadcast and multicast traffic. This reason alone
  makes IPvlan L3 mode a prime candidate for those looking for massive scale and
  predictable network integrations. It is predictable and in turn will lead to
  greater uptimes because there is no bridging involved. Bridging loops have been
  responsible for high profile outages that can be hard to pinpoint depending on
  the size of the failure domain. This is due to the cascading nature of BPDUs
  (Bridge Port Data Units) that are flooded throughout a broadcast domain (VLAN)
  to find and block topology loops. Eliminating bridging domains, or at the least,
  keeping them isolated to a pair of ToRs (top of rack switches) will reduce hard
  to troubleshoot bridging instabilities. IPvlan L2 modes is well suited for
  isolated VLANs only trunked into a pair of ToRs that can provide a loop-free
  non-blocking fabric. The next step further is to route at the edge via IPvlan L3
  mode that reduces a failure domain to a local host only.L3 mode needs to be on a separate subnet as the default namespace since it
  requires a netlink route in the default namespace pointing to the IPvlan parent
  interface.The parent interface used in this example is eth0 and it is on the subnet
  192.168.1.0/24. Notice the docker network is not on the same subnet
  as eth0.Unlike IPvlan l2 modes, different subnets/networks can ping one another as
  long as they share the same parent interface -o parent=.
  
  $$ ip a show eth0
  3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
   link/ether 00:50:56:39:45:2e brd ff:ff:ff:ff:ff:ff
   inet 192.168.1.250/24 brd 192.168.1.255 scope global eth0
  A traditional gateway doesn't mean much to an L3 mode IPvlan interface since
  there is no broadcast traffic allowed. Because of that, the container default
  gateway points to the containers eth0 device. See below for CLI output
  of ip route or ip -6 route
  ```