MCU-PLUS-SDK-AM243X: How to configure Enet ICSSG switch to receive LLDP ethernet frames?

Hi Daniel,

Daniel Wadehn said:

Could someone please guide me how to apply the necessary configuration, that frames to this particular mac (or any multicast address including it) are not filtered out somewhere in the Enet-LLD/ICSSG/PRU chain?

I will try this on our end for the Enet Layer 2 ICSSG example that you mentioned. 

Daniel Wadehn said:

As a comparison I also looked at ICSS-EMAC based examples like "examples/industrial_comms/hsr_prp_demo". I was able to receive frames to (almost) arbitrary mac addresses, but still not any LLDP frames, even though there is code related to exactly the LLDP relevant mac address of interest (see hsrprp_processHighPrioFrames() at hsr_prp_main.c:1068.

This is expected as HSR_PRP example does not have LLDP frame support. For ICSS EMAC based examples we will have this support for Ethernet/IP and Profinet only(This feature will be present in SDK 8.6 onwards. Planned for April End 2023)

Daniel Wadehn said:

he fact, that the example "enet_layer2_multi_channel" contains similar code, but the corresponding LLDP mac branch has been made permanently evaluate to true...?

Could you please explain what do you mean by "LLDP mac branch has been made permanently evaluate to true."

Thanks for looking into it.

Nilabh Anand said:

This is expected as HSR_PRP example does not have LLDP frame support. For ICSS EMAC based examples we will have this support for Ethernet/IP and Profinet only(This feature will be present in SDK 8.6 onwards. Planned for April End 2023)

In our project we use the Enet (ICSS) networking configured through Sysconfig. The integration is similar to the enet_lwip_icssg example and I'm not sure if it would be feasible to switch to the ICSS-EMAC networking. Do I understand correctly that the ICSS-EMAC driver based networking, without also using the Ethernet/IP or Profinet stacks from TI, would still not allow to receive LLDP frames after the 8.6 SDK update?

Nilabh Anand said:

Could you please explain what do you mean by "LLDP mac branch has been made permanently evaluate to true."

Sorry, I was thinking about the following code in the "enet_layer2_multi_channel" example (see timeSync_ptp.c:323).

/**PTP MAC ID for comparison*/
uint8_t timeSyncMAC[6] = {0x1, 0x1b, 0x19, 0x0, 0x0, 0x0};
uint8_t linkLocalMAC[6] = {0x1, 0x80, 0xc2, 0x0, 0x0, 0xE};

/* ... */

void TimeSyncPtp_processRxNotifyTask(void *arg)
{
    uint32_t size  = 0;

/* ... */
                do
                {
                    status = EnetApp_getPtpFrame(hTimeSyncPtp->enet_perctxt,
                                                  &rxFrame[0],
                                                  &size,
                                                  &rxPort);
                    if (status == TIMESYNC_OK)
                    {
                        dstMacId = rxFrame;

                        if (TIMESYNC_COMPARE_MAC(dstMacId, timeSyncMAC))
                        {
                            TimeSyncPtp_processPtpFrame(hTimeSyncPtp, rxFrame, rxPort, size, 0);
                        }
                        else if (true || TIMESYNC_COMPARE_MAC(dstMacId, linkLocalMAC))
                        {
                            TimeSyncPtp_processPtpFrame(hTimeSyncPtp, rxFrame, rxPort, size, 1);
                        }
                    }

/* ... */

}

This example is even less related to out project configuration, but contains LLDP mac address related code similar to the HSR PRP demo. However, in this case with a "true ||" prepended to the if condition, which may indicate that there is something special about LLDP frames even in the CPSW examples.

Hi Daniel,

Let me try to come back by Thursday on this.

BR

Nilabh A.

Hi Nilabh,

is there already any update on this topic?

Thank you and best regards,

Daniel

Hi Nilabh,

is there still no update for this topic?

We are facing EIP certification (not with TI stack).

For external stacks: Is this feature working on AM243x with current sdk? Is there an example available?

Best regards,

Tommy

Hi Daniel/TOmmy,

Apologies for not being able to get back sooner. I was OOO.

For adding LLDP support to ICSSG application 1. The forwarding rules are programmed using FDB table. The forwarding and tagging information has to set using an IOCTL. ICSSG_PER_IOCTL_VLAN_SET_ENTRY is the IOCTL used to set an entry. Use this ENET_IOCTL() API and pass ICSSG_PER_IOCTL_VLAN_SET_ENTRY command with valid params. 

Can you please let me know if you want to use vlan aware mode or unaware mode:

For unaware mode you can use following ioctl:  https://software-dl.ti.com/mcu-plus-sdk/esd/AM243X/latest/exports/docs/api_guide_am243x/group__DRV__ENET__ICSSG.html#gga2e2b170ba4c7c2f45b86da4bc27898bbaf872f28fc60ce1535a4bec36ae46b449

For vlan aware mode please refer following eample:software-dl.ti.com/.../EXAMPLES_ENET_VLAN_ICSSG.html

Thanks Nilabh,

we check the suggestions and give you feedback as soon as possible.

Best regards,

Tommy

Sure Tommy.