I think that you just need to create an L3 vlan subinterface:
vpp# create sub-interface <actual-trunk-port> 300 At that point, <actual-trunk-port>.300 should be an L3 subinterface which will strip vlan tag 300 for RX packets, and add vlan tag 300 for TX packets. Strikes me that that’s exactly what you need. if <actual-trunk-port>=GigabitEthernet3/0/0, setting TRUNK_PORT to GigabitEthernet3/0/0.300 and inhaling the rest of the configuration MAY just work. I’ve never tested the various NAT flavors, the DNS resolver, etc. to see if the code truly works with vlan subinterfaces. Let me know what happens. I’ve never constructed a suitable test topology for this use case, so it may take some doing to fix issues. HTH... Dave From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of pepijn de vos Sent: Sunday, December 25, 2022 11:30 AM To: vpp-dev@lists.fd.io Subject: Re: [vpp-dev] Outdated home gateway script for NAT? Hi Dave, Thanks a lot of the update, I have managed to get it to work now, at least as a secondary router behind my ISP router. My ISP wants the WAN port to use VLAN 300, and I can't figure out how to do that. I've tried to push the vlan tag on the outward port set int l2 tag-rewrite $(TRUNK) push dot1q 300 and I tried creating a subinterface and binding nat44 to that create sub-interfaces $(TRUNK) 300 default set int state $(TRUNK).300 up set interface nat44 in bvi0 out $(TRUNK).300 and tried the reverse on the bvi0 interface. I might be missing the correct commands by a millimeter or a kilometer, but I'm not getting an IP on the WAN. TBH I did not copy most of the new additions because I had to google what some of them even stand for. Maybe once I got this all set up I should make a PR to add some comments and instructions for beginners like me on what some of these commands do and what they are for. Cheers, Pepijn
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