BGP Config

1) Configure BGP on your router and configure each of your Kubernetes worker nodes as a neighbor. Remember the AS that you use. For example on my `Ubiquiti EdgeRouter Lite`

```
ssh tj@sol
configure
set protocols bgp 1 parameters router-id 192.168.1.1
set protocols bgp 1 neighbor 192.168.40.100 remote-as 1
set protocols bgp 1 neighbor 192.168.40.101 remote-as 1
set protocols bgp 1 neighbor 192.168.40.102 remote-as 1
set protocols bgp 1 redistribute static
commit; save
```

Now I'll read the BGP configuration on my router and ensure that the state for each neighbor is "Active". Meaning it's configured and waiting for a connection to the neighbor.

```
root@sol:/home/tj# show ip bgp neighbors | grep state
  BGP state = Active
  BGP state = Active
  BGP state = Active
```

2) Deploy MetalLB to your Kubernetes cluster

```
kubectl apply -f https://raw.githubusercontent.com/google/metallb/v0.7.3/manifests/metallb.yaml
```

3) Create a ConfigMap to configure MetalLB to peer with your router. 

```
apiVersion: v1
kind: ConfigMap
metadata:
  namespace: metallb-system
  name: config
data:
  config: |
    peers:
    - peer-address: 192.168.1.1
      peer-asn: 1
      my-asn: 1
    address-pools:
    - name: VLAN20
      protocol: bgp
      addresses:
      - 192.168.20.0/24    
    - name: VLAN50
      protocol: bgp
      addresses:
      - 192.168.50.0/24
    - name: VLAN60
      protocol: bgp
      addresses:
      - 192.168.60.0/24
    - name: VLAN70
      protocol: bgp
      addresses:
      - 192.168.70.0/24
```

4) Apply the configmap to Kubernetes and check the state of each neighbor from your router again to ensure that the connection has became `Established`. 

```
kubectl apply -f config.yaml
```
```
root@sol:/home/tj# show ip bgp neighbors | grep state
  BGP state = Established, up for 00:00:53
  BGP state = Established, up for 00:00:53
  BGP state = Established, up for 00:00:53
```

5) Your configuration might look like this:
```
root@sol# show protocols bgp 1
 neighbor 192.168.40.100 {
     remote-as 1
 }
 neighbor 192.168.40.101 {
     remote-as 1
 }
 neighbor 192.168.40.102 {
     remote-as 1
 }
 parameters {
     router-id 192.168.1.1
 }
 redistribute {
     static {
     }
 }
```