GTP (Generic Tunneling Protocol)

1
GTP (Generic Tunneling Protocol)

• Alessio Casati/Lucent Technologies
• Charles E. Perkins/Nokia Research
• IETF 47
• draft-casati-gtp-00.txt

2
Background

• GTP is specified and deployed for 3GPP release 99
• 3GPP is looking for ways to incorporate Mobile IP
  into their protocol framework
• Mobile IP ad hoc study group has recommended
  inclusion for new 3GPP release
• We should try to encourage this development

3
Main Motivation

• GTP should be allowable as a Mobile IP tunneling
  mechanism
• GTP should become a Proposed Standard
• satisfies criteria of interoperability
• any changes from working group would be submitted
  to 3GPP

4
Packet Format

• 32 bit tunnel identifier
• Optional sequence number
• Protocol type field
• version number, bits controlling optional fields,
  length
• 8 bytes typical for IP
• UDP port 3386