[PATCH for net-next] if_ether.h: Clarify ethertype validity for gsw1xx dsa

[PATCH for net-next] if_ether.h: Clarify ethertype validity for gsw1xx dsa

[Peter Enderborg]

This 0x88C3 is registered to Infineon Technologies Corporate Research ST
and are used by MaxLinear. Infineon subsidiary Lantiq was acquired
by Intel. MaxLinear bought IP's from Intel including this network chip.
Ref https://standards-oui.ieee.org/ethertype/eth.txt

Signed-off-by: Peter Enderborg <peterend@axis.com>
---
 include/uapi/linux/if_ether.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/if_ether.h b/include/uapi/linux/if_ether.h
index 2c93b7b731c8..df9d44a11540 100644
--- a/include/uapi/linux/if_ether.h
+++ b/include/uapi/linux/if_ether.h
@@ -92,7 +92,9 @@
 #define ETH_P_ETHERCAT	0x88A4		/* EtherCAT			*/
 #define ETH_P_8021AD	0x88A8          /* 802.1ad Service VLAN		*/
 #define ETH_P_802_EX1	0x88B5		/* 802.1 Local Experimental 1.  */
-#define ETH_P_MXLGSW	0x88C3		/* MaxLinear GSW DSA [ NOT AN OFFICIALLY REGISTERED ID ] */
+#define ETH_P_MXLGSW	0x88C3		/* Infineon Technologies Corporate Research ST
+					 * Used by MaxLinear GSW DSA
+					 */
 #define ETH_P_PREAUTH	0x88C7		/* 802.11 Preauthentication */
 #define ETH_P_TIPC	0x88CA		/* TIPC 			*/
 #define ETH_P_LLDP	0x88CC		/* Link Layer Discovery Protocol */
-- 
2.34.1

Re: [PATCH for net-next] if_ether.h: Clarify ethertype validity for gsw1xx dsa

[Daniel Golle]

On Fri, Nov 14, 2025 at 02:59:36PM +0100, Peter Enderborg wrote:
> This 0x88C3 is registered to Infineon Technologies Corporate Research ST
> and are used by MaxLinear. Infineon subsidiary Lantiq was acquired
> by Intel. MaxLinear bought IP's from Intel including this network chip.
> Ref https://standards-oui.ieee.org/ethertype/eth.txt
> 
> Signed-off-by: Peter Enderborg <peterend@axis.com>

Thank you!

Reviewed-by: Daniel Golle <daniel@makrotopia.org>

> ---
>  include/uapi/linux/if_ether.h | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/include/uapi/linux/if_ether.h b/include/uapi/linux/if_ether.h
> index 2c93b7b731c8..df9d44a11540 100644
> --- a/include/uapi/linux/if_ether.h
> +++ b/include/uapi/linux/if_ether.h
> @@ -92,7 +92,9 @@
>  #define ETH_P_ETHERCAT	0x88A4		/* EtherCAT			*/
>  #define ETH_P_8021AD	0x88A8          /* 802.1ad Service VLAN		*/
>  #define ETH_P_802_EX1	0x88B5		/* 802.1 Local Experimental 1.  */
> -#define ETH_P_MXLGSW	0x88C3		/* MaxLinear GSW DSA [ NOT AN OFFICIALLY REGISTERED ID ] */
> +#define ETH_P_MXLGSW	0x88C3		/* Infineon Technologies Corporate Research ST
> +					 * Used by MaxLinear GSW DSA
> +					 */
>  #define ETH_P_PREAUTH	0x88C7		/* 802.11 Preauthentication */
>  #define ETH_P_TIPC	0x88CA		/* TIPC 			*/
>  #define ETH_P_LLDP	0x88CC		/* Link Layer Discovery Protocol */
> -- 
> 2.34.1
> 

Re: [PATCH for net-next] if_ether.h: Clarify ethertype validity for gsw1xx dsa

[Andrew Lunn]

On Fri, Nov 14, 2025 at 02:59:36PM +0100, Peter Enderborg wrote:
> This 0x88C3 is registered to Infineon Technologies Corporate Research ST
> and are used by MaxLinear. Infineon subsidiary Lantiq was acquired
> by Intel. MaxLinear bought IP's from Intel including this network chip.
> Ref https://standards-oui.ieee.org/ethertype/eth.txt
> 
> Signed-off-by: Peter Enderborg <peterend@axis.com>
> ---
>  include/uapi/linux/if_ether.h | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/include/uapi/linux/if_ether.h b/include/uapi/linux/if_ether.h
> index 2c93b7b731c8..df9d44a11540 100644
> --- a/include/uapi/linux/if_ether.h
> +++ b/include/uapi/linux/if_ether.h
> @@ -92,7 +92,9 @@
>  #define ETH_P_ETHERCAT	0x88A4		/* EtherCAT			*/
>  #define ETH_P_8021AD	0x88A8          /* 802.1ad Service VLAN		*/
>  #define ETH_P_802_EX1	0x88B5		/* 802.1 Local Experimental 1.  */
> -#define ETH_P_MXLGSW	0x88C3		/* MaxLinear GSW DSA [ NOT AN OFFICIALLY REGISTERED ID ] */
> +#define ETH_P_MXLGSW	0x88C3		/* Infineon Technologies Corporate Research ST
> +					 * Used by MaxLinear GSW DSA
> +					 */

Is this actually registered with IANA? 

https://www.iana.org/assignments/ieee-802-numbers/ieee-802-numbers.xhtml

Does not list it. Please keep the "NOT AN OFFICIALLY REGISTERED ID" if
it is not.

	Andrew

Re: [PATCH for net-next] if_ether.h: Clarify ethertype validity for gsw1xx dsa

[Peter Enderborg]

(resend due to html bounce)
On 11/15/25 21:41, Andrew Lunn wrote:
> On Fri, Nov 14, 2025 at 02:59:36PM +0100, Peter Enderborg wrote:
>> Ref https://standards-oui.ieee.org/ethertype/eth.txt
>>
>>
> Is this actually registered with IANA?

No.

> https://www.iana.org/assignments/ieee-802-numbers/ieee-802-numbers.xhtml
>
> Does not list it. Please keep the "NOT AN OFFICIALLY REGISTERED ID" if
> it is not.

Let med quote  text from your link.

Note

    This page has assignments under the control of the IEEE
    Registration Authority that are of primarily historic interest
    that and have traditionally been on the IANA web pages.
    For allocations under the IANA OUI [RFC9542 <https://www.iana.org/go/rfc9542>], see the "Ethernet
    Numbers" IANA web page.  Contact information for the IEEE
    Registration Authority is as follows:http://standards.ieee.org/develop/regauth

Ethertypes:

Registration Procedure(s)

    Not assigned by IANA. Per [RFC9542 <https://www.iana.org/go/rfc9542>], updates to this registry
    are coordinated with the expert.

Note

    The following list of Ethertypes is contributed unverified
    information from various sources.  See the IEEE Registration
    Authority web pages at [http://standards.ieee.org/develop/regauth]
    for a public list of Ethertypes.

    Another list of Ethertypes is maintained by Michael A. Patton
    and is accessible at:http://www.cavebear.com/archive/cavebear/Ethernet/index.html
         

> 	Andrew

IEEE is the official source to use for ethertype number assignment.

/Peter

Re: [PATCH for net-next] if_ether.h: Clarify ethertype validity for gsw1xx dsa

[Andrew Lunn]

On Mon, Nov 17, 2025 at 10:02:05AM +0100, Peter Enderborg wrote:
> (resend due to html bounce)
> On 11/15/25 21:41, Andrew Lunn wrote:
> > On Fri, Nov 14, 2025 at 02:59:36PM +0100, Peter Enderborg wrote:
> > > Ref https://standards-oui.ieee.org/ethertype/eth.txt
> > > 
> > > 
> > Is this actually registered with IANA?
> 
> No.
> 
> > https://www.iana.org/assignments/ieee-802-numbers/ieee-802-numbers.xhtml
> > 
> > Does not list it. Please keep the "NOT AN OFFICIALLY REGISTERED ID" if
> > it is not.

> IEEE is the official source to use for ethertype number assignment.

What i want to make clear is, if IEEE officially allocate this to
something else, this is an unofficial allocation, and the official use
can replace it. We have a few ID like this, and never had a collision
yet, but it could happen.

	Andrew

Re: [PATCH for net-next] if_ether.h: Clarify ethertype validity for gsw1xx dsa

[Peter Enderborg]

You have to pay us$4000 to get a ethertype.

On 11/17/25 14:28, Andrew Lunn wrote:
> On Mon, Nov 17, 2025 at 10:02:05AM +0100, Peter Enderborg wrote:
>> (resend due to html bounce)
>> On 11/15/25 21:41, Andrew Lunn wrote:
>>> On Fri, Nov 14, 2025 at 02:59:36PM +0100, Peter Enderborg wrote:
>>>> Ref https://standards-oui.ieee.org/ethertype/eth.txt
>>>>
>>>>
>>> Is this actually registered with IANA?
>> No.
>>
>>> https://www.iana.org/assignments/ieee-802-numbers/ieee-802-numbers.xhtml
>>>
>>> Does not list it. Please keep the "NOT AN OFFICIALLY REGISTERED ID" if
>>> it is not.
>> IEEE is the official source to use for ethertype number assignment.
> What i want to make clear is, if IEEE officially allocate this to
> something else, this is an unofficial allocation, and the official use
> can replace it. We have a few ID like this, and never had a collision
> yet, but it could happen.

This is the public list from IEEE. It wont get more official. Yes, official
allocation can be changed in non backward compatible way. It happen
in 1983 so it can happen again. If the standard changes we need to adopt.

"NOT AN OFFICIALLY REGISTERED ID" is wrong, it is "Infineon Technologies Corporate Research ST".

> 	Andrew

Re: [PATCH for net-next] if_ether.h: Clarify ethertype validity for gsw1xx dsa

[Andrew Lunn]

On Mon, Nov 17, 2025 at 03:59:13PM +0100, Peter Enderborg wrote:
> You have to pay us$4000 to get a ethertype.
> 
> On 11/17/25 14:28, Andrew Lunn wrote:
> > On Mon, Nov 17, 2025 at 10:02:05AM +0100, Peter Enderborg wrote:
> > > (resend due to html bounce)
> > > On 11/15/25 21:41, Andrew Lunn wrote:
> > > > On Fri, Nov 14, 2025 at 02:59:36PM +0100, Peter Enderborg wrote:
> > > > > Ref https://standards-oui.ieee.org/ethertype/eth.txt
> > > > > 
> > > > > 
> > > > Is this actually registered with IANA?
> > > No.
> > > 
> > > > https://www.iana.org/assignments/ieee-802-numbers/ieee-802-numbers.xhtml
> > > > 
> > > > Does not list it. Please keep the "NOT AN OFFICIALLY REGISTERED ID" if
> > > > it is not.
> > > IEEE is the official source to use for ethertype number assignment.
> > What i want to make clear is, if IEEE officially allocate this to
> > something else, this is an unofficial allocation, and the official use
> > can replace it. We have a few ID like this, and never had a collision
> > yet, but it could happen.
> 
> This is the public list from IEEE. It wont get more official. Yes, official
> allocation can be changed in non backward compatible way. It happen
> in 1983 so it can happen again. If the standard changes we need to adopt.
> 
> "NOT AN OFFICIALLY REGISTERED ID" is wrong, it is "Infineon Technologies Corporate Research ST".

Ah. Let me see if i have this correct.....

Infineon made a spin off called Lantiq.

Lantiq was acquired by Intel

MaxLinear acquired Intels Connected Home division.

Assuming the rights to this ID transferred along the way, it is
O.K. for MaxLinear to use this ID. But, IANAL...

Please expand the commit message with this history, which is then a
justification for removing the NOT AN OFFICIALLY REGISTERED ID, and
why it is O.K. for MaxLinear to use it.

	Andrew

[PATCH net-next v2] if_ether.h: Clarify ethertype validity for gsw1xx dsa

[Peter Enderborg]

From: Peter Enderborg <peterend@axis.com>

This 0x88C3 is registered to Infineon Technologies Corporate Research ST
and are used by MaxLinear.
Infineon made a spin off called Lantiq.
Lantiq was acquired by Intel
MaxLinear acquired Intels Connected Home division.

The product FAQ from MaxLinear describes it's history from the F24S.
The driver for the gsw1xx is based on Lantiq showing it's similarities.

Ref https://standards-oui.ieee.org/ethertype/eth.txt

Signed-off-by: Peter Enderborg <Peter.Enderborg@axis.com>
---
 include/uapi/linux/if_ether.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/if_ether.h b/include/uapi/linux/if_ether.h
index 2c93b7b731c8..df9d44a11540 100644
--- a/include/uapi/linux/if_ether.h
+++ b/include/uapi/linux/if_ether.h
@@ -92,7 +92,9 @@
 #define ETH_P_ETHERCAT	0x88A4		/* EtherCAT			*/
 #define ETH_P_8021AD	0x88A8          /* 802.1ad Service VLAN		*/
 #define ETH_P_802_EX1	0x88B5		/* 802.1 Local Experimental 1.  */
-#define ETH_P_MXLGSW	0x88C3		/* MaxLinear GSW DSA [ NOT AN OFFICIALLY REGISTERED ID ] */
+#define ETH_P_MXLGSW	0x88C3		/* Infineon Technologies Corporate Research ST
+					 * Used by MaxLinear GSW DSA
+					 */
 #define ETH_P_PREAUTH	0x88C7		/* 802.11 Preauthentication */
 #define ETH_P_TIPC	0x88CA		/* TIPC 			*/
 #define ETH_P_LLDP	0x88CC		/* Link Layer Discovery Protocol */
-- 
2.34.1

Re: [PATCH net-next v2] if_ether.h: Clarify ethertype validity for gsw1xx dsa

[Andrew Lunn]

On Wed, Nov 26, 2025 at 02:54:06PM +0100, Peter Enderborg wrote:
> From: Peter Enderborg <peterend@axis.com>
> 
> This 0x88C3 is registered to Infineon Technologies Corporate Research ST
> and are used by MaxLinear.
> Infineon made a spin off called Lantiq.
> Lantiq was acquired by Intel
> MaxLinear acquired Intels Connected Home division.
> 
> The product FAQ from MaxLinear describes it's history from the F24S.
> The driver for the gsw1xx is based on Lantiq showing it's similarities.
> 
> Ref https://standards-oui.ieee.org/ethertype/eth.txt
> 
> Signed-off-by: Peter Enderborg <Peter.Enderborg@axis.com>

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew

Re: [PATCH net-next v2] if_ether.h: Clarify ethertype validity for gsw1xx dsa

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net-next.git (main)
by Jakub Kicinski <kuba@kernel.org>:

On Wed, 26 Nov 2025 14:54:06 +0100 you wrote:
> From: Peter Enderborg <peterend@axis.com>
> 
> This 0x88C3 is registered to Infineon Technologies Corporate Research ST
> and are used by MaxLinear.
> Infineon made a spin off called Lantiq.
> Lantiq was acquired by Intel
> MaxLinear acquired Intels Connected Home division.
> 
> [...]

Here is the summary with links:
  - [net-next,v2] if_ether.h: Clarify ethertype validity for gsw1xx dsa
    https://git.kernel.org/netdev/net-next/c/6557cae0a2a1

You are awesome, thank you!
-- 
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