As technology evolves the need of high speed, high-bandwidth and reliable interface is a prime requirement of any system. As a result of such needs CISCO systems comes up with a solution under the name of "Interlaken". Interlaken is an interconnect protocol optimized for high-bandwidth and reliable packet transfer. It is a narrow, high-speed channelized chip-to-chip interface, which takes advantages of two dominant high-speed chip-to-chip interface protocols for networking applications such as XAUI (Roman numeral X, meaning ten, and the initials of "Attachment unit interface") and SPI4.2 (System Packet Interface level 4, phase 2). It works as an interface between 1st and 2nd layer of OSI model, i.e. PHY layer and data link layer devices.