I am trying to get SGT transport working between an MX75 and a C9300. It should be simple enough - but all packets get blocked when I try and enable it.
On the C9300 side I say the port is peer SGT capable.
![PhilipDAth_0-1708580244227.png PhilipDAth_0-1708580244227.png](https://community.meraki.com/t5/image/serverpage/image-id/35771i843914F58341FA1B/image-size/medium?v=v2&px=400)
On the MX75 LAN port, I do something similar.
![PhilipDAth_1-1708580294081.png PhilipDAth_1-1708580294081.png](https://community.meraki.com/t5/image/serverpage/image-id/35772i7076A48F59876FBC/image-size/medium?v=v2&px=400)
Of note, the C9300 port configured for SGT peer transport frequently generates UDLD alerts.
![PhilipDAth_2-1708580352284.png PhilipDAth_2-1708580352284.png](https://community.meraki.com/t5/image/serverpage/image-id/35773iCCAB7DCE3912AC1F/image-size/medium?v=v2&px=400)
I've tried several different firmware versions. I've tried a support case (but they have now gone quiet). Annoying, the MX does not seem to be able to do a packet capture of packets SGT tagged, so I can't even examine what is going wrong.
Anyone else got this working?