Messages in this thread | | | Date | Thu, 29 May 2014 09:55:39 +0200 | From | Jiri Pirko <> | Subject | Re: [PATCH net] bridge: notify user space after fdb update |
| |
Thu, May 29, 2014 at 09:27:16AM CEST, jmaxwell37@gmail.com wrote: >There has been a number incidents recently where customers running KVM have >reported that VM hosts on different Hypervisors are unreachable. Based on >pcap traces we found that the bridge was broadcasting the ARP request out >onto the network. However some NICs have an inbuilt switch which on occasions >were broadcasting the VMs ARP request back through the physical NIC on the >Hypervisor. This resulted in the bridge changing ports and incorrectly learning >that the VMs mac address was external. As a result the ARP reply was directed >back onto the external network and VM never updated it's ARP cache. This patch >will notify the bridge command, after a fdb has been updated to identify such >port toggling. > >Signed-off-by: Jon Maxwell <jmaxwell37@gmail.com>
Reviewed-by: Jiri Pirko <jiri@resnulli.us>
| |