VLAN tag doesn't get disabled

Shylesh S

Hi,

I am using vayu EVM J6 board. I work with PTP Packets for achieving time stamping. I see that my outgoing packets get VLAN tagged(4 Bytes) at the 12th-15th byte. This occurs, even when the VLAN support is disabled in the config file.

I don't want my outgoing EVENT Packets to have these 4 bytes (VLAN Tag). Please help me in disabling this entirely, So that I will not have any VLAN Tag in my outgoing PTP Packets.

Note: I use GLSDK 6.04 and Ubuntu 12.04.

Thanks,

Shylesh S

over 8 years ago

0 Cvetolin Shulev-XID over 8 years ago

TI__Guru 65405 points

Hi Shylesh,

Seems that you have some VLAN configuration issue. You should remove the VLAN encapsulation on the egress port. You can find description about removing on VLAN at:
processors.wiki.ti.com/.../Sitara_Linux_Dual_Emac_Mode
You should focus on the force_untagged_egress variable.
Also you can read in the TRM about VLAN settings.

BR
Tsvetolin Shulev

0 Shylesh S over 8 years ago in reply to Cvetolin Shulev-XID

Intellectual 755 points

Hi Cvetolin,

Thanks for the valuable reply. I went through the link and TRM regarding the VLAN Settings. It seems like, I am using the CPSW driver which is yet to be developed completely. Because, I found a comment in cpsw.c file which says,

         *The switch cannot filter multicast traffic unless it is configured
         * in "VLAN Aware" mode. Unfortunately, VLAN awareness requires a
         * whole bunch of additional logic that this driver does not implement
         * at present.

I am actually using GLSDK 6.04 version, where I couldn't find the variable "force_untagged_egress".

Can you please let me know which version of GLSDK is to be used to achieve this, or if any patches are available to fix this?

Thanks and Regards,
Shylesh S

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VLAN tag doesn't get disabled