vge traffic problem
ehrmann at gmail.com
Sun Jan 3 06:56:09 UTC 2010
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 18.104.22.168
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
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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