[f-nsp] MLXe slow on 10G doing inter-vlan routing

[Steven Raymond]

MLXe, very lightly loaded, with only one card BR-MLX-10Gx8-X.  Simplest of configuration, layer 2 link with VE interfaces.  During inter-vlan routing where the ingress traffic and egress traffic are on the same port, say e1/2, the input traffic level will be fine, but the output traffic is effectively maxed out at about 50Mbps (on a 10GigE port).  Shift hosts around so that the egress is a different port on the same card, bang problem gone and full expected traffic rates achieved.

Tried numerous code versions, from 05800a to 05900a to 06000.  No improvement.

Of course tried rebooting, new optics, new cabling.  No errors incrementing on the interface.  This is the silliest dumb problem in a long time.  Any ideas are appreciated.

Thanks!