[Bug 997978] Re: KVM images lose connectivity with bridged network

[Stephane Neveu]

Same kind of problem here :

Running Ubuntu-servers 12.04 VMs on Ubuntu-servers 12.04 using
KVM/Libvirt over bridges.

Pinging my gateway from a random VM and watching packets with tcpdump on
the kvm host :

icmp is ok on my vnet -> ok on the bridge -> ok on my bond (active-
backup) -> ok on my gateway (reply) -> ok on my bond -> ok on my brigde
-> No packet received on my vnet !!!!

brct showmacs mybridge seems to be ok showing my mac:addr (bridge+vm)

I have to ifdown/ifup my eth0 on virtual guest to make it work again til
the next time.

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https://bugs.launchpad.net/bugs/997978

Title:
  KVM images lose connectivity with bridged network

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