8.12. Verifying Network Configuration Teaming for Redundancy

Network redundancy is a process when devices are used for backup purposes to prevent or recover from a failure of a specific system. The following procedure describes how to verify the network configuration for teaming in redundancy:
Procedure
  1. Ping the destination IP from the team interface. For example: 
    ~]# ping -I team0 DSTADDR
  2. View which interface is in active mode: 
    ~]#  teamdctl team0 state
setup:
  runner: activebackup
ports:
  eth1
    link watches:
      link summary: up
      instance[link_watch_0]:
        name: ethtool
        link: up
        down count: 0
  eth2
    link watches:
      link summary: up
      instance[link_watch_0]:
        name: ethtool
        link: up
        down count: 0
runner:
  active port: eth1
    eth1 is the active interface.
  3. Set the active slave interface down: 
    ~]# ip link set eth1 down
  4. Check if the backup interface is up: 
    ~]#  teamdctl team0 state
setup:
 runner: activebackup
ports:
 eth1
   link watches:
     link summary: down
     instance[link_watch_0]:
       name: ethtool
       link: down
       down count: 1
 eth2
   link watches:
     link summary: up
     instance[link_watch_0]:
       name: ethtool
       link: up
       down count: 0
runner:
 active port: eth2
    eth2 is now the active interface.
  5. Check if you can still ping the destination IP from the team interface: 
    ~]# ping -I team0 DSTADDR