rhel7_lesson1.md

## RHEL 7 Network Teaming
```sh
# -*- mode: ruby -*-
# vi: set ft=ruby :

Vagrant.configure("2") do |config|
  config.vm.box = "centos/7"
  (1..2).each do |i|
  config.vm.define "server#{i}" do |node|
    node.vm.hostname = "server#{i}"
    node.vm.network :private_network, ip: "192.168.20.#{10+i}", netmask: "255.255.255.0"
    node.vm.network :private_network, ip: "192.168.20.#{20+i}", netmask: "255.255.255.0"
    node.vm.provider "virtualbox" do |vb|
       vb.customize ["modifyvm", :id, "--memory", 2048]
       vb.customize ["modifyvm", :id, "--cpus", 2]
    end
  end
  end
end
```

```sh
# nmcli con add type team con-name team0 ifname team0
# nmcli con show
NAME         UUID                                  TYPE            DEVICE
team0        011a1577-b463-45d2-a58b-d3dd1912ea0b  team            team0
System eth0  5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03  802-3-ethernet  eth0
```
modify

```sh
nmcli con modify <tab><tab>
help          id            path          System\ eth0  team0         --temporary   uuid
```

identify property to modify
```sh
nmcli con modity team0  <tab><tab>
connection.autoconnect           connection.zone                  ipv6.addresses
connection.autoconnect-priority  ipv4.addresses                   ipv6.dhcp-hostname
connection.autoconnect-slaves    ipv4.dhcp-client-id              ipv6.dhcp-send-hostname
connection.gateway-ping-timeout  ipv4.dhcp-hostname               ipv6.dns
connection.id                    ipv4.dhcp-send-hostname          ipv6.dns-search
connection.interface-name        ipv4.dns                         ipv6.gateway
connection.master                ipv4.dns-search                  ipv6.ignore-auto-dns
connection.metered               ipv4.gateway                     ipv6.ignore-auto-routes
connection.permissions           ipv4.ignore-auto-dns             ipv6.ip6-privacy
connection.read-only             ipv4.ignore-auto-routes          ipv6.may-fail
connection.secondaries           ipv4.may-fail                    ipv6.method
connection.slave-type            ipv4.method                      ipv6.never-default
connection.timestamp             ipv4.never-default               ipv6.route-metric
connection.type                  ipv4.route-metric                ipv6.routes
connection.uuid                  ipv4.routes                      team.config
```
sumary command
```sh
# nmcli connection add type team con-name team0 ifname team0
# nmcli connection modify team0 ipv4.addresses "192.168.20.5/24" ipv4.method manual
# nmcli connection add type team-slave con-name team0-port1 ifname eth1 master team0
# nmcli connection add type team-slave con-name team0-port2 ifname eth2 master team0
# nmcli connection show
```

```sh
# nmcli connection show
NAME         UUID                                  TYPE            DEVICE
team0-port2  ba55a4e7-b855-4dec-b6d6-ab7f413e5739  802-3-ethernet  eth2
System eth0  5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03  802-3-ethernet  eth0
team0-port1  63a91ee5-d42c-48bf-bfbc-3be7cda31ee6  802-3-ethernet  eth1
team0        a8d40631-5076-46ef-9b90-b4fcd146f3f0  team            team0
```
Monitor state
```sh
# teamdctl team0 state
setup:
  runner: roundrobin
ports:
  eth1
    link watches:
      link summary: up
      instance[link_watch_0]:
        name: ethtool
        link: up
        down count: 1
  eth2
    link watches:
      link summary: up
      instance[link_watch_0]:
        name: ethtool
        link: up
        down count: 1
```

Config
- Broadcast : Data is transmitted over all ports
- round-robin : Data is transmitted over all ports in turn
- active-backup : one port or link is used while others are kept as a backup
- loadbalance :with active Tx load balancing and BPF-Based Tx port Selectors
- lacp (implements the 802.3ad link aggregation Controll Protocol)

```sh
nmcli connection modify team0 team.config '{"runner": {"name": "activebackup"}}'
nmcli connection down team0
nmcli connection up team0
```