  In today's data centers, the performance of interconnects plays a pivotal
role. However, many of the underlying technologies for these interconnects have
a history of several decades and existed long before data centers came into
being.To better cater to the requirements of data center networks, particularly
in the context of intra-rack communication, we have developed a new
interconnect. This interconnect is based on a lossless link layer protocol,
named RIFL. In this work, we designed and implemented RIFL Layer 2, a scalable
network that supports up to multi-hundred Gbps communication. RIFL Layer 2
includes the RIFL switch and RIFL NIC. By utilizing a simple Batcher Banyan and
iSLIP RIFL switch, we effectively keep the typical intra-rack latency under 400
nanoseconds. Moreover, for a 32-port 100Gbps network, under both Bernoulli
arrival and bursty arrival traffic patterns, we ensure that the 99\% tail
latency does not exceed 12microseconds.
