Thanks for the reply, Will try the bandwidth option. The example i tried was "basic" example, also tried iperf example, it also gives the same error after a while. I noticed in iperf, ip addresses are zero.

When running ethernet examples on esp32 ethernet dev board, getting following error:

esp.emac: emac_esp32_transmit(231): insufficient TX buffer size[0m

what could be the cause, using latest ESP-IDF SDK.