Hi,
I have 3 xen box with 2-3 VM on each.
Each server has 2 nic (1 for external and 1 for internal network).
All VMs are webserver and they mount a nfs filesystem.
I''ve noticed that on each dom0 there are many dropped packets.
Server config is:
1- DELL (2xQuad Xeon E5320 @1.86Ghz - 8Gb Ram - Perc5 - Kernel 2.6.18-6
(debian etch))
2- DELL (2xDual Xeon 5110 @1.60Ghz - 4Gb Ram - Perc5 - Kernel 2.6.18-6
(debian etch))
3 - 2xOpteron 242 @ 1,60Ghz - 2Gb Ram - 3ware raid controller - kernel
2.6.18-6 (debian etch))
This is my ifconfig output for the first server (the other 2 are almost
same):
eth0 Link encap:Ethernet HWaddr 00:1d:09:64:5f:24
inet6 addr: fe80::21d:9ff:fe64:5f24/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:245795 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:40862474 (38.9 MiB) TX bytes:468 (468.0 B)
eth1 Link encap:Ethernet HWaddr 00:1d:09:64:5f:22
inet addr:xx.yy.1.69 Bcast:xx.yy.1.255 Mask:255.255.255.0
inet6 addr: fe80::21d:9ff:fe64:5f22/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:479842 errors:0 dropped:0 overruns:0 frame:0
TX packets:198275 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:192767731 (183.8 MiB) TX bytes:21411435 (20.4 MiB)
vm1 Link encap:Ethernet HWaddr fe:ff:ff:ff:ff:ff
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1194712 errors:0 dropped:0 overruns:0 frame:0
TX packets:1508990 errors:0 dropped:223 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:99855963 (95.2 MiB) TX bytes:1003008460 (956.5 MiB)
vm2 Link encap:Ethernet HWaddr fe:ff:ff:ff:ff:ff
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:116748356 errors:0 dropped:0 overruns:0 frame:0
TX packets:94485672 errors:0 dropped:224545 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:68131399991 (63.4 GiB) TX bytes:51427565429 (47.8 GiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:19 errors:0 dropped:0 overruns:0 frame:0
TX packets:19 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1684 (1.6 KiB) TX bytes:1684 (1.6 KiB)
peth0 Link encap:Ethernet HWaddr 00:1d:09:64:5f:24
inet6 addr: fe80::21d:9ff:fe64:5f24/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1531831 errors:1 dropped:0 overruns:0 frame:1
TX packets:1194720 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1010983841 (964.1 MiB) TX bytes:121870721 (116.2 MiB)
Interrupt:16 Memory:f4000000-f4011100
peth1 Link encap:Ethernet HWaddr 00:1d:09:64:5f:22
inet6 addr: fe80::21d:9ff:fe64:5f22/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:95000175 errors:2 dropped:0 overruns:0 frame:2
TX packets:116918856 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:52438104794 (48.8 GiB) TX bytes:70395166347 (65.5 GiB)
Interrupt:16 Memory:f8000000-f8011100
vm3 Link encap:Ethernet HWaddr fe:ff:ff:ff:ff:ff
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:771 errors:0 dropped:0 overruns:0 frame:0
TX packets:570250 errors:0 dropped:25082 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:79742 (77.8 KiB) TX bytes:211507576 (201.7 MiB)
vm4 Link encap:Ethernet HWaddr fe:ff:ff:ff:ff:ff
inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1660 errors:0 dropped:0 overruns:0 frame:0
TX packets:110937 errors:0 dropped:12414 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1521641 (1.4 MiB) TX bytes:56440105 (53.8 MiB)
There''re a bridge for each nic:> brctl show
bridge name bridge id STP enabled interfaces
eth0 8000.001d09645f24 no vm1
peth0
eth1 8000.001d09645f22 no vm2
peth1
vm3
vm4
I''ve also enabled arp_filtering with:
echo 1 > /proc/sys/net/ipv4/conf/all/arp_filter
And i''ve disabled tx checsum with:
ethtook -K for every network interface in dom0 and on domU
Can anyone help me?
Thank''s a lot.
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