S32K中的主题 Re: SJA 1105 Management frames (MKA / EAPOL)

SJA 1105 Management frames (MKA / EAPOL)

eugstluk — Fri, 23 May 2025 09:43:14 GMT

Hello Community

I have a working setup using a SJA1105 Q switch.
I am doing testing with the MKA protocol.
In the user manual (UM11040 - Software user manual for SJA1105) I found that Management frames (including MKA protocol related frames with the Group MAC address of 01-08-C2-00-00-03) are being filtered and redirected to the HOST port.

I can confirm that setup in the configuration with:

"MAC_FLTRES[0]": 0x0180C200000E,

"MAC_FLTRES[1]": 0x0180C2000003,

"MAC_FLT[0]": 0xFFFFFF0000FF,

"MAC_FLT[1]": 0xFFFFFF0000FF,

.......

"HOST_PORT": 4,

Is there any way to not filter these packets, i.e. forward them to all ports (like a "transparent" switch setup for MKA / MACsec) or is this not possible?

Thanks for any help!

Re: SJA 1105 Management frames (MKA / EAPOL)

PavelL — Fri, 23 May 2025 14:11:57 GMT

Hello @eugstluk ,

Management frames are very special on that. Please check AH1704 SJA1105PQRS Application Hints , rev 1.4 - chapters 7.3.2. and 7.6.7.3 . I will ask application engineer for assistance. I'll keep you informed.

Best regards,

Pavel

Re: SJA 1105 Management frames (MKA / EAPOL)

PavelL — Mon, 26 May 2025 11:12:32 GMT

Hello @eugstluk ,

I received confirmation from apps:

If you do not want the SJA1105PQRS to forward management traffic to the host port, you need to make sure that the filter (MAC_FLT[i] and MAC_FLTRES[i]) do not match the management traffic. It is described in the user manual how those filters work:
If DEST_MAC and MAC_FLT[i] = MAC_FLTRES[i] holds true, the frame carrying DEST_MAC will be forwarded to the host port. Thus, setting MAC_FLT[i] equal to all 0s should do the trick.

Best regards,

Pavel

Re: SJA 1105 Management frames (MKA / EAPOL)

eugstluk — Tue, 27 May 2025 07:44:52 GMT

Hello Pavel,

Thank you very much for the quick reply and checking with the application engineer! I will try to apply the new filter settings.

Best regards