Hello, all. I hope this is the correct list for this question. We are having serious problems on high BDP networks using GRE tunnels. Our traces show it to be a TCP Window problem. When we test without GRE, throughput is wire speed and traces show the window size to be 16MB which is what we configured for r/wmem_max and tcp_r/wmem. When we switch to GRE, we see over a 90% drop in throughput and the TCP window size seems to peak at around 500K.
What causes this and how can we get the GRE tunnels to use the max window size? Thanks - John -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
