You need to set up the bridging so that KVM/XEN or LXC containers based virtual machines (guests) to show up on the same network as the host server. Bridged configuration needs bridge-utils installed. Bonded configuration need ifenslave utility. In this tutorial, you will learn how to create bonded and bridged networking on Ubuntu 16.04 LTS server.
Install ifenslave on Ubuntu
Type the following command:
$ sudo apt install ifenslave bridge-utils
Bridge with Bonding on Ubuntu
Backup your /etc/network/interfaces file, run:
$ sudo cp /etc/network/interfaces /etc/network/interfaces.bakup
Edit /etc/network/interfaces, run:
$ sudo vi /etc/network/interfaces
First create, bond0 interface config without an IP address and enslave eth0 and eth2 as follows:
auto bond0 iface bond0 inet manual bond-lacp-rate 1 post-up ifenslave bond0 eth0 eth2 pre-down ifenslave -d bond0 eth0 eth2 bond-slaves none bond-mode 4 bond-lacp-rate fast bond-miimon 100 bond-downdelay 0 bond-updelay 0 bond-xmit_hash_policy 1 |
Next edit/update eth0 without an IP address for bond master bond0:
auto eth0 iface eth0 inet manual bond-master bond0 auto eth2 iface eth2 inet manual bond-master bond0 |
Finally, create br0 bridge and assign an IP address and other IP settings including gateway:
auto br0 iface br0 inet static address 10.86.115.66 netmask 255.255.255.192 broadcast 10.86.115.127 gateway 10.86.115.65 # ------------------------------------------ # Example: set dns server too # dns-nameservers 8.8.8.8 8.8.4.4 10.86.115.1 # ------------------------------------------ # Static route example #up route add -net 10.0.0.0/8 gateway 10.86.115.65 #down route del -net 10.0.0.0/8 #up route add -net 161.26.0.0/16 gateway 10.86.115.65 #down route del -net 161.26.0.0/16 # ------------------------------------------ # Want to know what the default and more info # on the following options? # Read brctl(8) man page # ------------------------------------------ bridge_ports bond0 bridge_stp off bridge_fd 9 bridge_hello 2 bridge_maxage 12 |
Save and close the file. Reboot the server or restart the networking service:
$ sudo systemctl restart networking
Verify it:
$ brctl show
Sample outputs:
bridge name bridge id STP enabled interfaces br0 8000.0025904fb06c no bond0
See bond0 status and other info:
$ more /proc/net/bonding/bond0
Sample outputs:
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011) Bonding Mode: IEEE 802.3ad Dynamic link aggregation Transmit Hash Policy: layer3+4 (1) MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0 802.3ad info LACP rate: fast Min links: 0 Aggregator selection policy (ad_select): stable System priority: 65535 System MAC address: 00:25:90:4f:b0:6c Active Aggregator Info: Aggregator ID: 1 Number of ports: 1 Actor Key: 9 Partner Key: 43 Partner Mac Address: b0:fa:eb:13:97:00 Slave Interface: eth0 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 00:25:90:4f:b0:6c Slave queue ID: 0 Aggregator ID: 1 Actor Churn State: none Partner Churn State: none Actor Churned Count: 0 Partner Churned Count: 0 details actor lacp pdu: system priority: 65535 system mac address: 00:25:90:4f:b0:6c port key: 9 port priority: 255 port number: 1 port state: 63 details partner lacp pdu: system priority: 32768 system mac address: b0:fa:eb:13:97:00 oper key: 43 port priority: 32768 port number: 300 port state: 61 Slave Interface: eth2 MII Status: down Speed: Unknown Duplex: Unknown Link Failure Count: 0 Permanent HW addr: 00:25:90:4f:b0:6e Slave queue ID: 0 Aggregator ID: 2 Actor Churn State: churned Partner Churn State: churned Actor Churned Count: 1 Partner Churned Count: 1 details actor lacp pdu: system priority: 65535 system mac address: 00:25:90:4f:b0:6c port key: 0 port priority: 255 port number: 2 port state: 71 details partner lacp pdu: system priority: 65535 system mac address: 00:00:00:00:00:00 oper key: 1 port priority: 255 port number: 1 port state: 1 |
Make sure routing is up and correct:
$ ip r show
$ ping google.com
$ ping www.cyberciti.biz
This entry is 7 of 7 in the Linux and Unix Network Bridging Tutorial series. Keep reading the rest of the series:
- Debian Linux: Configure Network Interfaces As A Bridge / Network Switch
- OpenBSD: Configure Network Interface As A Bridge / Network Switch
- How To PFSense Configure Network Interface As A Bridge / Network Switch
- FreeBSD: NIC Bonding / Link Aggregation / Trunking / Link Failover
- Setup Bridge (br0) Network on Ubuntu Linux
- Ubuntu setup a bonding device and enslave eth0+eth2
- Setup Bonded (bond0) and Bridged (br0) Networking On Ubuntu
5 comment
thanks a lot, it helps me to setup an r710
Hello.
In your sample output i see different “Aggregator ID” for member of bond interface. It is normal? I mean i have bond of two 1G interfaces and i have also different “Aggregator ID”. And got speed of bond interface is 1G instead 2G.
What you have pointed out is correct . LACP isnt working fine .
Active Aggregator Info:
Aggregator ID: 1
Number of ports: 1 –> Number of devices participated in LACP .( failed status )
Different Aggregator ID means that LACP isnt working .
Aggregator ID: 1
Aggregator ID: 2
Hi,
I am using CentOS 6 I want configure post-fix for multiple IPs but not configure any idea about that so please update me
What you have pointed out is not correct . LACP isnt working fine .
Active Aggregator Info:
Aggregator ID: 1
Number of ports: 1 –> Number of devices participated in LACP .( failed status )
Different Aggregator ID means that LACP isnt working .
Aggregator ID: 1
Aggregator ID: 2