ICNP, the IEEE International Conference on Network Protocols, is the premier conference covering all aspects of network protocol research, including design, analysis, specification, verification, implementation, and performance. ICNP 2013, the 21st annual edition, will be held in Göttingen, Germany between October 7 and 11, 2013. ICNP 2013 will also address Information-Centric Networking (ICN) as a new theme. Papers with significant research contributions to the field of network protocols and ICN designs are solicited for submission. Papers cannot be previously published nor under review by another conference or journal. Papers containing plagiarized material will be subject to the IEEE plagiarism policy and will be rejected without review.