I have 2 NIC cards and tried for NIC bonding as:

1) Shutdown active interfaces by the following command: ifdown eth0 and ifdown eth1

2) Commentout the ethernet configurations and add bonding configuration into /etc/network/interfaces
The code goes like this:
# Loopback network interface
auto lo
iface lo inet loopback

auto bond0
iface bond0 inet static
address 192.168.1.x
netmask 255.255.255.0
gateway (Router's IP)

bond-slaves eth0 eth1

# LACP (Link Aggregation Control Protocol) configuration

bond_mode active-backup
bond_miimon 100
bond_lacp_rate 1

3) Bring up the bonding interface using the command: sudo ifup bond0

4) Restart the network to take the changes into consideration using
sudo /etc/init.d/networking restart

Well, now I'm able to access internet. But when I tried to remove one cable out, I'm unable to access.Even though the bond mode is kept in active-backup, why it's happening so?

Can someone please help in this regard?

Is LACP enabled on your switch?

1 members found this post helpful.

Hi Ser Olmy...
I'm doing this NIC bonding at client side in which I'm getting internet access via router and switch.
Here we have D-Link 8 port desktop switch in which I'm using two ports to accomplish my work. I think LACP enabling is possible only in rack mountable switch.
Please drop your thoughts.

Thanking you...