Hi, Apologies in advance if this question has been asked in the past.
I have been performing mTCP-related tests on dpdk-16.04 with ixgbe PMD. I am using 82599ES 10-Gigabit adapters for my experiments. I have a few queries regarding LRO. 1) What is the theoretical maximum size of the Ethernet frame I can get from the driver once LRO is enabled? In my experiments, I was seeing packet size as high as 16KB. Can it be as high as ~2^16 bytes (iph->tot_len)? 2) Since the NIC is reassembling payloads (of one flow) into a single packet, what does the Ethernet controller do with the tcp checksum field in the TCP header? I am observing that each LRO packet has checksum value as zero? Is that normal? I could not find any relevant documentation on the Web. Thanks in advance, --Asim
