>> I did enable some more lwip debugging output and saw that at some point pbuf fails to allocate memory on receiving a packet. Yeah, it's clear from the pcap that lwip stops processing packets from the host. It looks like you need debug statements in memp_malloc and memp_free rather than packet content. Marty
FWIW - In the txt file from the original post, there is UDP traffic from 192.168.9.1 to 192.168.9.255 which is being seen by lwip. They don't show up in the pcap.
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