i've added iptables -t mangle -A POSTROUTING -o br0 -p udp -m udp -j
CHECKSUM --checksum-fill:
>iptables -vnt mangle -L --lin
Chain PREROUTING (policy ACCEPT 44532 packets, 46M bytes)
num pkts bytes target prot opt in out source
destination
Chain INPUT (policy ACCEPT 44307 packets, 46M bytes)
num pkts bytes target prot opt in out source
destination
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
num pkts bytes target prot opt in out source
destination
Chain OUTPUT (policy ACCEPT 37675 packets, 25M bytes)
num pkts bytes target prot opt in out source
destination
Chain POSTROUTING (policy ACCEPT 37675 packets, 25M bytes)
num pkts bytes target prot opt in out source
destination
1 301 27725 CHECKSUM udp -- * br0 0.0.0.0/0
0.0.0.0/0 udp CHECKSUM fill
it doesn't appear it's had much impact though. pings are still
exhibiting the generally erratic behaviors discussed.
a possibly unrelated note - reading through bug 1029430, i thought i'd
also try not using vhost_net. i unloaded the module [as well as the
macvtap module], and edited the guest's config, removing the <driver
name='vhost' txmode='iothread'/> line:
<interface type='network'>
<mac address='52:54:00:f3:b2:32'/>
<source network='host-bridge'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03'
function='0x0'/>
</interface>
however, when starting the guest, the kernel modules are automatically
loaded, and the guest appears to still be using the vhost_net module,
according to ps output such as in my earlier note. i'm probably doing
this wrong, but i'm not sure what.
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https://bugs.launchpad.net/bugs/1153364
Title:
trouble with guest network connectivity when host is using a bonded
interface
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