We've run into problems when using LX/LH or SX optics on the WAN port of an MX right out of the box. It's always required a firmware upgrade before the WAN port will work with those optics. Same goes for using some 1G optics on the SFP+ ports.
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Hey @Kamome , under traffic shaping -> SD-WAN policies you can set "Custom performance classes" and you can apply them to your VPN Traffic and set it to a WAN Interface Hope that helps. Greets
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