Date: Sun, 03 Jan 2010 06:55:54 -0800 From: David Ehrmann <ehrmann@gmail.com> To: freebsd-current@freebsd.org Subject: vge traffic problem Message-ID: <4B40AFFA.6090706@gmail.com>
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I reported this problem before, but I have a specific, reproducible example, now. I'm running 8.0 RC1. I'm trying to fetch the source to upgrade to 8.0, but this happens: # csup stable-supfile Connected to 72.233.193.64 Receiver: Connection reset by peer Will retry at 22:39:31 tcpdump output of that: http://pastebin.com/m16978f3 (there seem to be a lot of duplicate acks being sent). I tried with a different server, and I tried several times, but generally, the same thing, though I do occasionally get lucky. I have a vr interface on my motherboard, so I gave it an IP address in a different subnet and changed the default gateway to a NAT box with the same default gateway as this box used to have (so I'm using the same internet connection). Suddenly, it works. Reproducibly. I also have issues with samba, but putting that aside, netstat -s -p tcp reported this: tcp: ... 289024537 packets received 116305350 acks (for 1099476725 bytes) 3119202 duplicate acks That's a duplicate ack received for every 37 unique acks. Seems pretty high for traffic on a small LAN, but I could be wrong. I checked the cable; it is cat5e or cat 6. I also tried plugging the vge port into a 10/100 mbps switch, but csup still failed. Ideas? I saw that there were a few recent changes to vge, but I'm not sure if they're related to this.
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