NIC Teaming on CentOS 7 with Nmtui

NIC Teaming on CentOS 7 with Nmtui

in the Linux, which can aggregate multiple network links into a single logical link, can increase network throughput or redundancy. For example, we can assign an IP address to a group of two network interfaces, doubling our throughput, or reserving an interface for the backup, and if the first fails, the second NIC continues to work. Link aggregation has done bond in the past ,but in RHEL7 ,team will be the preferred method. Because team can be aggregated more efficiently, more advantageous than bonding. List of differences for team and Bond .

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Here we will show you how to create and configure a team with two different network interfaces .

1, Teaming Daemon installation

In order to use the teaming feature, the TEAMD package must first be installed and the system will not normally install. Use the following command to install.

#yum Install Teamd-y

2, Nmtui Configuration teaming

First check the system current connection and device configuration

[Email protected] desktop]# NMCLI device status

DEVICE TYPE State CONNECTION

eno16777736 Ethernet Disconnected--

eno33554992 Ethernet Disconnected--

Lo Loopback unmanaged--

[Email protected] desktop]# NMCLI connection Show

NAME UUID TYPE DEVICE

[Email protected] desktop]#

There are no connection on both NICs. Perform Nmtui configuration teaming.

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Select "Edit a Connection" to move the cursor to OK and enter the next step.

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Select Add, enter.

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Select the device type Team,crate.

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The profile name is set according to the requirements, which is set to Myteam0,device and can also be set according to the requirements, which is set to TEAM0. When the settings are complete, move the cursor to add, adding the slave device.

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Select Ethernet Type Creation

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Profile name is set to Myteam0-port1,device, set to the server NIC device name, as required.

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Add the second NIC and set the profile name and device. Set to complete as result.

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JSON configuration, move cursor to edit, enter will temporarily open a vim window, enter {"Runner" in Vim window: {"name": "LoadBalance"}},

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After you save the exit, it appears as follows.

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Configure IPv4, set to Manual, set IP, gateway, DNS as follows

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After completing the Save exit, the teaming configuration completes automatically creating the relevant configuration file as follows:

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[email protected] network-scripts]# cat Ifcfg-myteam0

Device=team0

team_config= "{\" Runner\ ": {\" name\ ": \" Loadbalance\ "}}"

Devicetype=team

Bootproto=none

dns1=192.168.31.1

Defroute=yes

Ipv4_failure_fatal=no

Ipv6init=yes

Ipv6_autoconf=yes

Ipv6_defroute=yes

Ipv6_failure_fatal=no

Name=myteam0

uuid=1f4ed5e2-46a1-4dbf-a870-5b088957a434

Onboot=yes

ipaddr=192.168.31.108

Prefix=24

gateway=192.168.31.1

Ipv6_peerdns=yes

Ipv6_peerroutes=yes

[email protected] network-scripts]# cat Ifcfg-myteam0-port1

Name=myteam0-port1

Uuid=2b975876-780f-4181-971e-a79cf6a07a40

device=eno16777736

Onboot=yes

team_master=1f4ed5e2-46a1-4dbf-a870-5b088957a434

Devicetype=teamport

[email protected] network-scripts]# cat Ifcfg-myteam0-port2

Name=myteam0-port2

Uuid=24e3ef82-fb93-4d11-9a6e-4c27227f7f66

device=eno33554992

Onboot=yes

team_master=1f4ed5e2-46a1-4dbf-a870-5b088957a434

Devicetype=teamport

[Email protected] network-scripts]#

Review the current connection status again.

[Email protected] desktop]# NMCLI connection Show

NAME UUID TYPE DEVICE

MYTEAM0 1f4ed5e2-46a1-4dbf-a870-5b088957a434 Team Team0

Myteam0-port2 24e3ef82-fb93-4d11-9a6e-4c27227f7f66 802-3-ethernet eno33554992

Myteam0-port1 2b975876-780f-4181-971e-a79cf6a07a40 802-3-ethernet eno16777736

View the status of the server's current device.

[Email protected] desktop]# NMCLI device status

DEVICE TYPE State CONNECTION

eno16777736 Ethernet Connected Myteam0-port1

eno33554992 Ethernet Connected Myteam0-port2

TEAM0 Team Connected Myteam0

Lo Loopback unmanaged--

View IP address information.

[[Email protected] desktop]# IP a s

1:lo: <LOOPBACK,UP,LOWER_UP> MTU 65536 qdisc noqueue State UNKNOWN

Link/loopback 00:00:00:00:00:00 BRD 00:00:00:00:00:00

inet 127.0.0.1/8 Scope host Lo

Valid_lft Forever Preferred_lft Forever

INET6:: 1/128 Scope Host

Valid_lft Forever Preferred_lft Forever

2:eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU qdisc pfifo_fast Master Team0 State up Qlen 1000

Link/ether 00:0c:29:51:e8:75 BRD FF:FF:FF:FF:FF:FF

3:eno33554992: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU qdisc pfifo_fast Master Team0 State up Qlen 1000

Link/ether 00:0c:29:51:e8:75 BRD FF:FF:FF:FF:FF:FF

5:TEAM0: <BROADCAST,MULTICAST,UP,LOWER_UP> MTU Qdisc Noqueue State up

Link/ether 00:0c:29:51:e8:75 BRD FF:FF:FF:FF:FF:FF

inet 192.168.31.108/24 BRD 192.168.31.255 Scope Global TEAM0

Valid_lft Forever Preferred_lft Forever

Inet6 fe80::20c:29ff:fe51:e875/64 Scope link tentative dadfailed

Valid_lft Forever Preferred_lft Forever

View Myteam0 's details and status as follows

[Email protected] desktop]# Teamdctl TEAM0 State

Setup

Runner:loadbalance

Ports

eno16777736

Link watches:

Link Summary:up

INSTANCE[LINK_WATCH_0]:

Name:ethtool

Link:up

Down count:0

eno33554992

Link watches:

Link Summary:up

INSTANCE[LINK_WATCH_0]:

Name:ethtool

Link:up

Down count:0

View slave NIC status via TEAMNL

[Email protected] ~]# TEAMNL TEAM0 ports

3:eno33554992:up 1000Mbit FD

2:eno16777736:up 1000Mbit FD

[Email protected] ~]#

3. Testing

On the client and ping 192.168.31.108, and then disconnect a NIC link on the server side, the ping command does not end.

[Email protected] desktop]# NMCLI device Disconnect eno16777736

Device ' eno16777736 ' successfully disconnected.

[Email protected] desktop]#

[Email protected] desktop]# NMCLI connection Show

NAME UUID TYPE DEVICE

Myteam0-port2 1a0f2bfd-cea1-4c7b-b2de-d34199b8561e 802-3-ethernet eno33554992

Myteam0-port1 8e0c325c-d069-4014-bb75-1fa1f4674618 802-3-ethernet--

MYTEAM0 e2976c8e-da7d-4901-88c6-db8a9913947c Team Team0

[Email protected] desktop]# NMCLI device status

DEVICE TYPE State CONNECTION

eno33554992 Ethernet Connected Myteam0-port2

TEAM0 Team Connected Myteam0

eno16777736 Ethernet Disconnected--

Lo Loopback unmanaged--

[Email protected] desktop]#

[Email protected] desktop]# Teamdctl TEAM0 State

Setup

Runner:loadbalance

Ports

eno33554992

Link watches:

Link Summary:up

INSTANCE[LINK_WATCH_0]:

Name:ethtool

Link:up

Down count:0

[Email protected] desktop]#

After disconnecting the link, view the client ping terminal.

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4. Modify Team Configuration

For team configuration can be modified by Nmtui or NMCLI, Nmtui open graphics, in the JSON configuration interface, select Edit to modify the contents of the Vim window to save exit.

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[Email protected] desktop]# NMCLI connection down Myteam0

Connection ' MYTEAM0 ' successfully deactivated (d-bus active path:/ORG/FREEDESKTOP/NETWORKMANAGER/ACTIVECONNECTION/9)

[Email protected] desktop]# NMCLI connection Show

NAME UUID TYPE DEVICE

Myteam0-port1 2b975876-780f-4181-971e-a79cf6a07a40 802-3-ethernet--

Myteam0-port2 24e3ef82-fb93-4d11-9a6e-4c27227f7f66 802-3-ethernet--

MYTEAM0 1f4ed5e2-46a1-4dbf-a870-5b088957a434 Team--

[Email protected] desktop]# NMCLI device status

DEVICE TYPE State CONNECTION

eno16777736 Ethernet Disconnected--

eno33554992 Ethernet Disconnected--

Lo Loopback unmanaged--

[Email protected] desktop]# NMCLI connection up Myteam0-port1

Connection successfully activated (D-bus active path:/ORG/FREEDESKTOP/NETWORKMANAGER/ACTIVECONNECTION/12)

[Email protected] desktop]# NMCLI connection up Myteam0-port2

Connection successfully activated (D-bus active path:/ORG/FREEDESKTOP/NETWORKMANAGER/ACTIVECONNECTION/14)

[Email protected] desktop]# NMCLI connection up Myteam0

Connection successfully activated (master waiting for slaves) (D-bus active path:/org/freedesktop/networkmanager/ ACTIVECONNECTION/15)

[Email protected] desktop]# NMCLI device status

DEVICE TYPE State CONNECTION

eno16777736 Ethernet Connected Myteam0-port1

eno33554992 Ethernet Connected Myteam0-port2

TEAM0 Team Connected Myteam0

Bond0 Bond Unmanaged--

Lo Loopback unmanaged--

[Email protected] desktop]# NMCLI connection Show

NAME UUID TYPE DEVICE

Myteam0-port1 2b975876-780f-4181-971e-a79cf6a07a40 802-3-ethernet eno16777736

Myteam0-port2 24e3ef82-fb93-4d11-9a6e-4c27227f7f66 802-3-ethernet eno33554992

MYTEAM0 1f4ed5e2-46a1-4dbf-a870-5b088957a434 Team Team0

[Email protected] desktop]# Teamdctl TEAM0 State

Setup

Runner:roundrobin

Ports

eno16777736

Link watches:

Link Summary:up

INSTANCE[LINK_WATCH_0]:

Name:ethtool

Link:up

Down count:0

eno33554992

Link watches:

Link Summary:up

INSTANCE[LINK_WATCH_0]:

Name:ethtool

Link:up

Down count:0

[Email protected] desktop]#

Note:

(1), team configuration file can be seen in the/usr/share/doc/teamd-1.25/directory of the document, you can also refer to

Man teamd.conf Help content

[Email protected] ~]# cd/usr/share/doc/teamd-1.25/

[[email protected] teamd-1.25]# ls

COPYING Example_configs Example_ifcfgs

[Email protected] teamd-1.25]# CD example_configs/

[[email protected] example_configs]# ls

activebackup_arp_ping_1.conf activebackup_ethtool_3.conf broadcast.conf loadbalance_3.conf

activebackup_arp_ping_2.conf activebackup_multi_lw_1.conf lacp_1.conf random.conf

activebackup_ethtool_1.conf activebackup_nsna_ping_1.conf loadbalance_1.conf roundrobin_2.conf

activebackup_ethtool_2.conf activebackup_tipc.conf loadbalance_2.conf roundrobin.conf

[Email protected] example_configs]#

(2),runners available is listed below (Configuration '-' remove input)

Broadcast (data is transmitted through all ports)

Round-robin (data is transmitted through all ports in turn)

Active-backup (one port or link is used and others is kept as a backup)

LoadBalance (with active Tx load balancing and bpf-based TX Port selectors)

LACP (implements the 802.3ad Link Aggregation Control Protocol)

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NIC Teaming on CentOS 7 with Nmtui