Bah. So I removed ipfw and dummynet from kernconf and loaded them manually after machine came up and it worked as expected.
Looks like some ordering issue between ipfw and dummynet. Fwiw, for working setup, kldstat shows: 13 2 0xffffffff81e21000 21490 ipfw.ko 14 1 0xffffffff81e43000 d0f6 dummynet.ko Cheers, Hiren
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