lkml.org 
[lkml]   [2023]   [Oct]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH net-next v2] ethtool: ice: Support for RSS settings to GTP from ethtool
Hi Jakub,

On Wed, Oct 18, 2023 at 10:37:03AM -0700, Jakub Kicinski wrote:
> Harald went further and questioned use of the same IP addresses for
> -U and -C traffic, but even within one endpoint aren't these running
> on a different port?

yes.

> Can someone reasonably use the same UDP port for both types of traffic?

I don't think so. In the entire 3GPP protocol world, the UDP port numbers
for GTP-U and GTP-C are fixed. The various signaling protocols allow you to
communicate the IPv4/v6 address and TEID of tunnel endpoints, but never allow
you to communicate the port number - which hence must always be the well-known port
(2123 for GTP-C + 2152 for GTP-U).

Of course somebody could do whatever they want in some kind of internal interface
not required to interoperate with any other equipment/implementation/operator, but
I'd consider it not falling in your question of "reasonable use".

Regards,
Harald

--
- Harald Welte <laforge@gnumonks.org> https://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)

\
 
 \ /
  Last update: 2023-10-18 20:10    [W:0.038 / U:0.896 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site