RFC 4247

Requirements for Header Compression over MPLS, November 2005

Canonical URL:
https://www.rfc-editor.org/rfc/rfc4247.txt
File formats:
Plain TextPDF
Status:
INFORMATIONAL
Authors:
J. Ash
B. Goode
J. Hand
R. Zhang
Stream:
IETF
Source:
avt (rai)

Cite this RFC: TXT  |  XML

DOI:  10.17487/RFC4247

Discuss this RFC: Send questions or comments to avt@ietf.org

Other actions: Submit Errata  |  Find IPR Disclosures from the IETF


Abstract

Voice over IP (VoIP) typically uses the encapsulation voice/RTP/UDP/IP. When MPLS labels are added, this becomes voice/RTP/UDP/IP/MPLS-labels. For an MPLS VPN, the packet header is typically 48 bytes, while the voice payload is often no more than 30 bytes, for example. Header compression can significantly reduce the overhead through various compression mechanisms, such as enhanced compressed RTP (ECRTP) and robust header compression (ROHC). We consider using MPLS to route compressed packets over an MPLS Label Switched Path (LSP) without compression/decompression cycles at each router. This approach can increase the bandwidth efficiency as well as processing scalability of the maximum number of simultaneous flows that use header compression at each router. In this document, we give a problem statement, goals and requirements, and an example scenario. This memo provides information for the Internet community.


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.


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