6 Apr
2020
6 Apr
'20
10:29 p.m.
Does anyone have any experience with a bridged APN on Open5GS?
David
7 Apr
7 Apr
6:18 p.m.
Hi David,
On Mon, Apr 06, 2020 at 04:29:21PM -0400, david(a)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 would be surprised if Open5GS supports non-IP PDN context types yet. But
of course, it could be implemented in the pgw.
Out of curiousity: Is this a service you are already able to get from
commercial / public mobile operators?
Regards,
Harald
--
- Harald Welte <laforge(a)osmocom.org> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
6:35 p.m.
The Druid EPC supports it but it's pretty pricey. Most of the UE now
support bridged APN but I don't know how exactly.
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 12:18 PM
To: david(a)ispsupplies.com
Cc: nextepc(a)lists.osmocom.org
Subject: Re: Bridged APN
Hi David,
On Mon, Apr 06, 2020 at 04:29:21PM -0400, david(a)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 would be surprised if Open5GS supports non-IP PDN context types yet. But
of course, it could be implemented in the pgw.
Out of curiousity: Is this a service you are already able to get from
commercial / public mobile operators?
Regards,
Harald
--
- Harald Welte <laforge(a)osmocom.org>
https://linkprotect.cudasvc.com/url?a=http%3a%2f%2flaforge.gnumonks.org%2f&…
=E,1,V3ywxDXXH4chv9NsJa4rDUER9Dad7xDLiL8Hi65mO1uEwaTryrvyLz7IJwz0FEOtt_hrk9Q
Jverxf1ouK0sHaN0Uie4v_5ezMnhS4RQaX3GSMKk2qdM,&typo=1
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
8:51 p.m.
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(a)ispsupplies.com 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> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
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.
9:23 p.m.
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:
On Mon, Apr 06, 2020 at 04:29:21PM -0400, david(a)ispsupplies.com 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)
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.
8 Apr
8 Apr
11:49 a.m.
Hi David,
On Tue, Apr 07, 2020 at 03:23:17PM -0400, david(a)ispsupplies.com wrote:
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.
Normally I would have assumed that the router has a LTE modem/interface
built-in, and hence the IP address of the PDP/PDN connection is local to
the router.
If you want to implement a UE that doesn't terminate the IP of the PDP/PDN
connection,
I would argue that this is a feature that can be implemented entirely on the UE
side, without any need from the network side.
Fundamentally, the point is that a 3GPP cellular network (before 5G)
provides a point-to-point IP interface. There are no Ethernet frames, no
MAC addresses, no broadcast domain, netmask, default gateway, etc.
A point-to-point interface only has a local and a remote IP address.
Think of the good old days of SLIP/PPP over dialup modems.
Sure, you can invent all kinds of hacks like running a local DHCP server
on the UE that hands out a single lease (which is the address allocated
by the P-GW/GGSN), but they are probably even more ugly hacks than to
implement stateless bi-directional 1:1 address translation in the UE.
In any case, I still don't see what the EPC could or should do in any of
this.
Regards,
Harald
--
- Harald Welte <laforge(a)osmocom.org> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
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Harald Welte