Link aggregation or IEEE 802.1AX-2008 is a computer networking term which describes using multiple network cables/ports in parallel to increase the link speed beyond the limits of any one single cable or port, and to increase the redundancy for higher availability.
Other terms for link aggregation include Ethernet bonding, NIC teaming, Trunking, port channel, link bundling, EtherChannel, Multi-link trunking (MLT), NIC bonding, network bonding, and Network Fault Tolerance (NFT).
First install ifenslave:
# apt-get install ifenslave
Then edit /etc/modprobe.d/arch/i386 and append to it:
alias bond0 bonding
options bond0 mode=balance-alb miimon=100
Then edit /etc/network/interfaces and configure the new interface
auto bond0
iface bond0 inet static
address 10.0.0.100
netmask 255.0.0.0
network 10.0.0.0
gateway 10.0.0.1
up /sbin/ifenslave bond0 eth0 eth1
Then restart the networking
# /etc/init.d/networking restart