overlay on gce with vxlan unicast flood

data

{
  "c1": {
    "hostname": "netlab-1-0xwl",
    "interfaces": {
      "vx1" : {
        "oip": "192.168.1.2/24",
        "vid": 1,
        "remotes": [
          "10.240.0.8"
        ]
      }
    },
    "uip": "10.240.0.5"
  },
  "r1": {
    "hostname": "netlab-1-7thz",
    "interfaces": {
      "vx1" : {
        "oip": "192.168.1.1/24",
        "vid": 1,
        "remotes": [
          "10.240.0.5"
        ]
      },
      "vx4" : {
        "oip": "192.168.4.1/24",
        "vid": 4,
        "remotes": [
          "10.240.0.6"
        ]
      },
      "vx3" : {
        "oip": "192.168.3.1/24",
        "vid": 3,
        "remotes": [
          "10.240.0.3"
        ]
      }
    },
    "uip": "10.240.0.8"
  },
  "bgp": {
    "hostname": "netlab-1-b2d5",
     "interfaces": {
      "vx3" : {
        "oip": "192.168.3.3/24",
        "vid": 3,
        "remotes": [
          "10.240.0.8",
          "10.240.0.6"
        ]
      }
    },
   "uip": "10.240.0.3"
  },
  "r2": {
    "hostname": "netlab-1-r30m",
    "interfaces": {
      "vx4" : {
        "oip": "192.168.4.2/24",
        "vid": 4,
        "remotes": [
          "10.240.0.8"
        ]
      },
      "vx2" : {
        "oip": "192.168.2.1/24",
        "vid": 2,
        "remotes": [
          "10.240.0.7"
        ]
      },
      "vx3" : {
        "oip": "192.168.3.2/24",
        "vid": 3,
        "remotes": [
          "10.240.0.3"
        ]
      }
    },
    "uip": "10.240.0.6"
  },
  "c2": {
    "hostname": "netlab-1-t7pr",
    "interfaces": {
      "vx2" : {
        "oip": "192.168.2.3/24",
        "vid": 2,
        "remotes": [
          "10.240.0.6"
        ]
      }
    }, 
    "uip": "10.240.0.7"
  }
}

routes

r2 sudo sysctl net.ipv4.conf.all.forwarding=1
r1 sudo sysctl net.ipv4.conf.all.forwarding=1
c1 sudo sysctl net.ipv4.conf.all.forwarding=1
c2 sudo sysctl net.ipv4.conf.all.forwarding=1
c1 sudo ip ro add 192.168.2.0/24 via 192.168.1.1
c1 sudo ip ro add 192.168.3.0/24 via 192.168.1.1
c2 sudo ip ro add 192.168.1.0/24 via 192.168.2.1
c2 sudo ip ro add 192.168.3.0/24 via 192.168.2.1
bgp sudo ip ro add 192.168.1.0/24 via 192.168.3.1
bgp sudo ip ro add 192.168.2.0/24 via 192.168.3.2
r1 sudo ip ro add 192.168.2.0/24 via 192.168.4.2
r2 sudo ip ro add 192.168.1.0/24 via 192.168.4.1

setup

#!/bin/bash -ex

set_if () {
	hostname=$(jq -r '.hostname' <<< $1)
	uip=$(jq '.uip' <<< $1)
	interfaces=$(jq -r '.interfaces | keys | .[]' <<< $1)
	for if in $( echo $interfaces); do
		oip=$(jq -r ".interfaces.${if}.oip" <<< $1)	
		vid=$(jq -r ".interfaces.${if}.vid" <<< $1)	
		remotes=$(jq -r ".interfaces.${if}.remotes | .[]" <<< $1)

		gcloud compute ssh $hostname -- sudo ip link add $if type vxlan id $vid dstport 4789 local $uip
		gcloud compute ssh $hostname -- sudo ip link set $if up
		gcloud compute ssh $hostname -- sudo ip a add $oip dev $if

		for remote in $remotes; do 
			gcloud compute ssh $hostname -- sudo bridge fdb append 00:00:00:00:00:00 dev $if dst $remote
		done
	done
}

do_host () {
	host=$(jq ".${1}" < data)
	set_if "$host"
}

do_host "c1"
do_host "r1"
do_host "bgp"
do_host "r2"
do_host "c2"