Groups | Search | Server Info | Login | Register

Groups > comp.protocols.misc > #68

What is TEID Control in GTPv1-C ?

Show all headers | View raw

Hi World,

I am confused regarding TEID in GTPv1-C.

As per my understanding, GTP-C manages the creation, deletion of a GTP-U tunnel.
GTP-C can be managed from a user space program and it's not a tunnel at this stage, but GTP-U is a tunnel, and is set up at kernel level.

When GTP-C sends a request to the peer, he is sending:

 - the Local TEID that he has reserved on his side for Data (user plane)
 - upon receipt of such a request, the peer is saying it's ok, I will deliver you a Local TEID on my side, so that we can instruct GTP-U to setup a tunnel with these 2 TEID,
 - The sequence of the messages are identified by Sequence Number. 

At GTP-U level, there is no Sequence Number, but TEID is used.
 
So I have 2 questions please:
 - Is it okay to say that GTP-C is only some GTP message sent through UDP, and the system can follow the sequence by using Sequence Number, thus there is no tunnel at all at this stage.
 - GTP-C is using Sequence Number, why is there a TEID Control Plane in addition to TEID Data Plane in GTP-C message? 
 what is the purpose of this TEID Control plane, because Sequence Number is used to map and follow the subsequent messages and why a TEID Control because GTP-C is not a tunnel? or is it?

Thanks, 

Regards,

Back to comp.protocols.misc | Previous | Next — Next in thread | Find similar

Thread

What is TEID Control in GTPv1-C ? Papa Tana <papa.tana101@gmail.com> - 2020-07-12 06:35 -0700
  Re: What is TEID Control in GTPv1-C ? Papa Tana <papa.tana101@gmail.com> - 2020-07-23 00:01 -0700
    Re: What is TEID Control in GTPv1-C ? Papa Tana <papa.tana101@gmail.com> - 2020-08-17 23:58 -0700

csiph-web