Problems with NIC bridge to Virtual Machines

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xtropx

New Member
Dec 27, 2011
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Hello.
Proxmox is awesome but I am having trouble getting NIC's to pass through to VM's I have created.
I have Proxmox set up like this:

Dpx6T.jpg


I have a Ubuntu machine with ETH1 = VMBR1 & ETH0 = VMBR2:

l5GVF.jpg


I am trying to pass through eth1 to DYNAMIPS (router emulation some of you may be familiar with)

I have in my net file:

[[ROUTER R1]]
model = 3745
autostart = false
wic0/0 = WIC-2T
f0/0 = NIO_linux_eth:eth1

This is supposed to allow a router to bridge to eth1 and communicate with the external network. However, it is not working even though doing a show CDP neighbor shows the switch that the Proxmox interfaces are attached to. This is driving me crazy. I have tried changing almost every variable. Does anybody have any ideas?
 
Hi, I have similar issue with Dynamips connection. I have a dedicated Eth interface on my host that is connected to a Cisco switch (a trunk connection, QinQ to be more precise). I want to bridge all the traffic that comes via this link to a VM where Dynamips is running - I need to bridge VLAN tagged packets in both directions between physical interface on host and "physical" interface on the VM. I was able to successfully ping the switch directly from the VM, but I can only achieve one-way connection between Dynamips and Switch.
If I used OpenVZ VM, I could see CDP packets from the switch on Dynamips router, but not vice versa.
If I use KVM with Virtio ethernet interfaces, I see CDP packets from Dynamips router on the switch, but not the other direction.
I use Debian and Ubuntu as guest OS.

I used this setup on non-virtualized server and it worked flawlessly...

All the advices I have found describe how to connect VLAN tagged trunk to external network and then "divide" the particular VLANs to guests, but I need to let guest receive and send traffic with all the tags without Proxmox interfering with it.
 
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