Hello, I have found a cosmetic issue with a linux-cp TAP device (tested both plugins - original and patched linux-cp 31122 ). If you try to add multiple LCP TAP interfaces, sometimes there is bug in "vppctl show interface" output. MTU at the TAP is randomly shown incorrectly like: tap10 11 up 4/0/0/0 tap18 19 up 1500/0/0/0 tap26 27 up 9216/0/0/0
MTU 1500 pass to the control plane successfully and MTU inside netns is correct. Test script below, you may run it a few times to see an issue. I have run it inside netns "controlplane". Tested 21.10 and 22.02-rc0~347-g5dec92de6. Regards Petr #!/bin/bash vppctl lcp default netns controlplane for i in $(seq 1 30); do vppctl create loopback interface instance $i vppctl set interface mtu packet 1500 loop$i vppctl lcp create loop$i host-if br$i vppctl set interface state loop$i up done
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