Inner Fragmentation with VPP Non-CUPS Deployment

Feature Summary and Revision History

Summary Data

Applicable Product(s) or Functional Area

P-GW

Applicable Platform(s)

  • ASR 5500

  • VPC-DI

  • VPC-SI

Feature Default

Enabled - Configuration Required

Related Changes in This Release

Not Applicable

Related Documentation

Not Applicable

Revision History

Revision Details

Release

In this release, P-GW supports Inner Fragmentation with VPP Non-CUPS Deployment.

21.15.x

Feature Changes

Previous Behavior: When VPP is enabled for non-CUPS deployment, GTP-U header, and transport layer length is not used to determine the inner fragmentation threshold while sending downlink packets towards S-GW/eNodeB. This resulted in outer fragmentation of downlink packets.

New Behavior: When VPP is enabled for non-CUPS deployment, GTP-U header, and transport layer length is used to decide the inner fragmentation threshold while sending downlink packets towards S-GW/eNodeB. This change is applicable for both IPv4 and IPv6 Packet Data Network (PDN) type.

Customer Impact: When VPP is enabled for non-CUPS deployment, there will be an overall reduction in downlink packets with outer fragmentation towards S-GW/eNodeB.