topic DSCP rewritten on VLL in Data Center (MLX & CER/CES)

DSCP rewritten on VLL

Nick_Fawcett — Tue, 09 Feb 2021 02:09:38 GMT

I’ve got two VLL’s for a customer that are configured identically. The A end of both tunnels are on the same CER and the Z end goes to two different MLX units. One of the VLL’s has no problem, but the other one does. I have narrowed the problem down to the CER. The CER receives the customer traffic inside the VLL with e DSCP 46 EF value, but when it hands it off to the customer it’s changing the DSCP packet to CS1. The other VLL doesn’t seem to do this. Any ideas?

Re: DSCP rewritten on VLL

Nick_Fawcett — Tue, 09 Feb 2021 07:54:52 GMT

I wanted to share some new information. I removed the VLL and just created regular L2 vlan from end to end tagging it all along the way. Now DSCP value in the customers packets are unmodified from A to Z. I’m completely baffled here

Re: DSCP rewritten on VLL

SamPirok — Mon, 29 Mar 2021 19:58:37 GMT

Hi Nick, thank you for your patience, I ran this by our Data Center techs and they requested we open a case for this issue. If you log in to extremeportal.force.com you should be able to submit a new support ticket. I’m sorry we couldn’t be more helpful here but hopefully one of our engineers can assist you.