RFC 2549 is an April Fools' Day joke from 1999 that amends the earlier IP over Avian Carriers (RFC 1149) by adding Quality of Service. It humorously specifies service levels like Concorde and First Class, with barcodes on wings for priority. The document plays with real networking concepts, suggesting weighted fair queueing with scales and traffic shaping plots.

This RFC is a classic piece of internet lore, demonstrating the IETF's long tradition of April 1st humor. It parodies serious standards documents, complete with MIB definitions for carrier pulse rates and security considerations about stool pigeons. The joke extends to technical details like avoiding NATs because birds might eat them and using saran wrappers for encapsulation.

The RFC remains a beloved artifact, often cited to illustrate the community's culture. While purely fictional, it highlights real networking principles through absurdity. Its endurance shows how humor can engage developers with complex topics, making it a memorable entry in the history of internet standards.