We've had some network problems that were resolved by disabling tcp
checksum offloading on all the domUs. Our symptom was we couldn't
ssh (or do much else) between two domUs on the same physical host.
So on each domU we run:
sudo /sbin/ethtool -K eth0 tx off
Hope this helps!
Gabe
--
Gabriel M. Schuyler, sysop
Intercasting Corporation
On Oct 10, 2007, at 12:11 AM, progressdll wrote:
in a xen environment , i see a lot op dropped packets via netstat -i
Is this a sign of network problems, or is it normal to see this
kind of
numbers? i'm not sure how to interprete the data. is this normal, bad,
critical. What are your stats on this?
I guess i have a xen issue of some sort, but not sure what yet
# netstat -i
Kernel Interface table
Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR
TX-DRP
TX-OVR Flg
eth0 1500 0 53999491 0 0 0 6234874
0 0
0 BMRU
lo 16436 0 9247734 0 0 0 9247734
0 0
0 LRU
peth0 1500 0 135679270 0 0 0 95455766
0 0
0 BORU
tap0 1500 0 5411876 0 0 0 35071803
0 0
0 BMRU
vif-vmdeb 1500 0 0 0 0 0 35 0
333350
0 BORU
vif0.0 1500 0 6234874 0 0 0 53999492
0 0
0 BORU
vif6.0 1500 0 55813641 0 0 0 98482968 0
482338
0 BORU
vif6.1 1500 0 0 0 0 0 39 0
46875771
0 BORU
vif68.0 1500 0 0 0 0 0 0
0 0
0 BOU
vif69.0 1500 0 9349348 0 0 0 30571290 0
3282
0 BORU
vif69.1 1500 0 0 0 0 0 44 0
18947590
0 BORU
vif70.0 1500 0 129605 0 0 0 460256
0 702
0 BORU
vif70.1 1500 0 0 0 0 0 35 0
333350
0 BORU
xenbr0 1500 0 46298695 0 0 0 0
0 0
0 BORU
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packets-a-sign-of-network-problem--tf4598987.html#a13130626
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