NIC-Teaming in RedHat Linux Server

 

NIC-Teaming:

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Red Hat Enterprise Linux 7 implements network teaming with a small kernel driver and a userspace daemon, teamd. The kernel handles network packets efficiently and teamd handles logic

and interface processing. Software, called runners, implement loadbalancing and active-backup

logic, such as round robin. The following runners are available to teamd:

1. Broadcast: a simple runner which transmits each packet from all ports.

2. Round Robin: a simple runner which transmits packets in a round-robin fashion  from each of the ports.

3. Activebackup: this is a failover runner which watches for link changes and selects an active port for data transfers.

4. Loadbalance: this runner monitors traffic and uses a hash function to try to reach a perfect balance when selecting ports for packet transmission.

5. LACP: implements the 802.3ad Link Aggregation Control Protocol. Can use the same transmit port selection possibilities as the loadbalance runner. We will create Round-Robin teaming. 

Suppose we have 2 LAN-Cards. Named - ens33 & ens34. We will create team by combining these 2 LAN-Cards.

[root@mushfiq ~]# nmcli  connection  add  con-name  team  type  team ifname team  config  '{"runner": {"name": "roundrobin"}}'

*** Note:

             -->No need to memorize -- '{"runner": {"name": "roundrobin"}}' . But how?

             -->Give this command & scroll down : man  teamd.conf

[root@mushfiq ~]# nmcli  connection  show

[root@mushfiq ~]# nmcli  connection  add con-name  team-slave1  type  team-slave  ifname ens33  master  team  connection.autoconnect  yes

[root@mushfiq ~]# nmcli  connection  add con-name  team-slave2  type  team-slave  ifname ens34  master  team  connection.autoconnect  yes

[root@mushfiq ~]# nmcli  connection  show

[root@mushfiq ~]# teamdctl  team  state

[root@mushfiq ~]# nmcli  connection  modify  team  ipv4.addresses  172.16.1.33/24  ipv4.method  manual  connection.autoconnect  yes

[root@mushfiq ~]# nmcli connection up team

[root@mushfiq ~]# ifconfig

Testing:

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1. ping  172.16.1.33

2. shutdown any LAN-Card like ens33.