Hi David,
On Tue, Apr 07, 2020 at 06:18:23PM +0200, Harald Welte wrote:
On Mon, Apr 06, 2020 at 04:29:21PM -0400, david@ispsupplies.com wrote:
Does anyone have any experience with a bridged APN on Open5GS?
As far as I know, 3GPP didn't really introduce "Ethernet" type PDN contexts until very recent releases. For a long time, IPv4, IPv6 and IPv4v6 were the only available options.
I just checked: Etehernet type PDN connections are only supported in 5G, but not in 4G/EPC. Even Releae 15 doesn't mention it at all.
So whatever some vendors may be offering, I would bet it is not really any actual Ethernet bridging. It may be more something like proxy-ARP on the PGW side, but still only passing IP over the 4G network.
The big question is: What is it used for, and what are the requirements of that use case? A real Ethernet bridge would be transparent regarding the MAC addresses on both sides. And that's what I'm stating is not possible over 4G as per 3GPP specs.