Opened 16 years ago
Closed 16 years ago
#5100 closed defect (fixed)
PCnet FAST-III not working in bridged mode while Intel desktop does
| Reported by: | Neighbour | Owned by: | |
|---|---|---|---|
| Component: | network | Version: | VirtualBox 3.0.6 |
| Keywords: | bridge pcnet packetloss dhcp | Cc: | |
| Guest type: | Linux | Host type: | Windows |
Description ¶
For some reason, when the VM's nic is bridged with the host's nic, packets destined for the VM are not picked up by the bridge interface. Test scenario: Capture for VM's MAC on dhcpserver, with the command: tcpdump -n -i eth1 -w vm_dhcpserver.cap ether src 08:00:27:24:BC:30 or ether dst 08:00:27:24:BC:30 or ether dst ff:ff:ff:ff:ff:ff Capture on the VM's host using wireshark, on the interface with which the VM is bridged. Capture the VM's nic using vboxmanage modifyvm --nictrace. Boot the VM, execute 'ifdown eth0' and then 'ifup eth0' and wait until the prompt returns. Save a screenshot of the VM window. Stop the captures and shut down the guest.
The above has been done for both situations (PCnet FAST-III and Intel Desktop adapter). As you can see, there are outgoing packets, which are responded to by the DHCPserver, but for some reason they never make it back to the VM. Strangely enough, the DHCPreplies are *not* picked up using wireshark on the host, but *are* picked up in the nictrace when using the Intel Desktop NIC in the guest.
Change History (15)
by , 16 years ago
by , 16 years ago
| Attachment: | vm_dhcpserver.cap added |
|---|
Network Traffic Dump on DHCPserver for PCnet Fast-III testrun
by , 16 years ago
| Attachment: | vm_host-filtered.cap added |
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Host traffic dump for PCnet FAST-III testrun (filtered on VM-MAC and broadcast MAC)
by , 16 years ago
| Attachment: | vm_nictrace.cap added |
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VBox' nictrace on Guest for PCnet FAST-III testrun
by , 16 years ago
| Attachment: | Network_Issue_Screenshot.png added |
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Screenshot taken after PCnet Fast-III testrun
by , 16 years ago
| Attachment: | Debian.2.xml added |
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VM configuration for Intel Pro/1000 MT Desktop testsetup
by , 16 years ago
| Attachment: | vm_dhcpserver.2.cap added |
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Network Traffic Dump on DHCPserver for Intel Pro/1000 MT Desktop testrun
by , 16 years ago
| Attachment: | vm_host-filtered.2.cap added |
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Host traffic dump for Intel Pro/1000 MT Desktop testrun (filtered on VM-MAC and broadcast MAC)
by , 16 years ago
| Attachment: | nictrace.cap added |
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VBox' nictrace on Guest for Intel Pro/1000 MT Desktop testrun
by , 16 years ago
| Attachment: | Screenshot.png added |
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Screenshot taken after Intel Pro/1000 MT Desktop testrun
comment:1 by , 16 years ago
Is this still an issue with VBox 3.0.8? This version has a fix for the PCNet network device emulation which could be related to your problem.
comment:2 by , 16 years ago
All the 3 tested VM's (debian lenny x86, ubuntu server 9.04 x86, and ubuntu desktop 9.04 x86) now have a working bridged network with the PCNet-fastIII adapter. As far as I can see, the issue is fixed in 3.0.8.
Testrun with PCnet FAST-III adapter