Data Center (MLX & CER/CES)

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 DSCP rewritten on VLL

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Nick Fawcett's profile image
Nick Fawcett posted 02-08-2021 18:09

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?

Sam Pirok's profile image
Sam Pirok Best Answer

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 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.

Nick Fawcett's profile image
Nick Fawcett

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