UDP loss - Arista 7150

Hi All,

I have 2 x Arista 7150s in play.

TCP traffic is fine, but when i try to pass UDP traffic i get tons of packet loss.

The set up i have is 1000mb forced on 1GB SMF SFP both sides.

When i place a media converter between them - i can hardcode speed down to 100MB and wallah the packet loss is gone with UDP.

(i can not hardcode the 1GB SFP down to 100MB, nor have i had to in the past).

Any ideas on a solution around this without the media converters?