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 <lafo...@gnumonks.org> https://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
_______________________________________________
Intel-wired-lan mailing list
Intel-wired-lan@osuosl.org
https://lists.osuosl.org/mailman/listinfo/intel-wired-lan
