Ticket #9532 (closed defect: fixed)

Opened 10 years ago

Last modified 10 years ago

all incoming Ethernet multicast dropped => Fixed in SVN

Reported by: seb Owned by: ramshankar
Component: network Version: VirtualBox 4.1.2
Keywords: Cc:
Guest type: Solaris Host type: Solaris


Running a Solaris 10 guest in 4.1.2 on Solaris 11 (build 172). I have the network configured in bridged mode with the Intel Pro/1000 MT Desktop adapter (I have tried all other adapters and all exhibit this same problem).

It appears that Virtualbox is dropping all incoming multicast packets. The host VNIC used by Virtualbox sends them up, but they're being dropped somewhere between the VNIC and the guest adapter (snoop in the guest doesn't show them). This is easily demonstrated by pinging and observing that all nodes in the IPv4 subnet receive the multicast ICMP echo except for the Virtualbox guest.

As a side-effect of this, IPv6 in the guest doesn't work _at all_. IPv6 depends on multicast to do neighbor discovery, router discovery, and stateless address autoconfiguration. None of this works in the guest as a result of this bug.

Change History

comment:1 Changed 10 years ago by ramshankar

  • Owner set to ramshankar
  • Status changed from new to assigned

With the new VBoxBow bridged networking filter, we stop using physical promiscuous mode and let Crossbow handle filtering relevant incoming packets (at the moment broadcast, unicast). This brings us significant performance improvements on cards with multiple MAC rings. I hadn't yet time to look into multicast scenario, will take a look now.

Thanks for the report.

comment:2 Changed 10 years ago by ramshankar

  • priority changed from critical to major

comment:3 Changed 10 years ago by ramshankar

  • Summary changed from all incoming Ethernet multicast dropped to all incoming Ethernet multicast dropped => Fixed in SVN

Fixed, and should be available in the next version. Many thanks for the report.

comment:4 Changed 10 years ago by frank

  • Status changed from assigned to closed
  • Resolution set to fixed

Fixed in VBox 4.1.4.

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