RE: Bridged APN

The reason this is something people want is that the UE in bridge mode can offer a public IP to a router behind the UE. I do agree that this is likely something very proprietary. A proxy-ARP would be good but I am not sure how that would work in the UE. David Peterson Senior Engineer 855-947-7776 ext. 9214 c 419-706-7355 d 979-314-1305 https://www.ispsupplies.com    -----Original Message----- From: Harald Welte <laforge(a)osmocom.org> Sent: Tuesday, April 7, 2020 2:52 PM To: david(a)ispsupplies.com Cc: nextepc(a)lists.osmocom.org Subject: Re: Bridged APN Hi David, On Tue, Apr 07, 2020 at 06:18:23PM +0200, Harald Welte wrote: 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. -- - Harald Welte <laforge(a)osmocom.org> https://linkprotect.cudasvc.com/url?a=http%3a%2f%2flaforge.gnumonks.org%2f&… =E,1,hNWtGbT4z6FpXSVPyJKcFjf3Z0KiFEs8jM-ieaMX3jUKxhJL6VV9DcaPN5fdRSrnNaVHR5G hVAve_eYEICjye1bCYOfis2a5-vfq2X4NJZr6S8viUCbMA4Q5bg,,&typo=1 ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)