Hi, Any suggestions on what my problem is. i got combined transceivers + cable (3m) from fs.com I have mellanox connectx3 (on server running rhel 7) talking to mikrotic cr309. The ifconnect at linux end comes up ok. The links for the cable flashes ok. The mikrotic can see the transceiver in it. The nic comes up uses dhcp to get an ip address but i can not ping in or out to the rhel nic after that. I flashed connectx3's to latest firmware and flashed mikrotic to latest firmware. I have another intel unraid box can't talk via same brand cable and transceivers via mikrotic also. I'm stumped. There is not much i can change/screw up on mikrotic in swos mode.