Horst Mundt, one of our technical account managers in Germany, recently queried the VMware internal “network” alias for suggestions on a simple virtual appliance that acts as an Ethernet bridge. A flurry of replies ensued. Horst collated the replies into the list below that I thought was worth sharing.
Note: do this in your lab, not in your production network! A bridge will create a loop in your network if run across two uplinks (vmnics). You’ve been warned! Also note, you will need to alter the port security settings on the bridge to allow for forged transmits.
2. Linux bridge module. It can be used to act as a bridge between 2 vnics.
3. Wanem (WAN Emulator) although main purpose is to emulate a wide area network with delay/drop/reordering/etc.
4. You can even use Windows 2003 to bridge multiple NICs. You can highlight multiple interfaces and bridge them. You create the bridge in the "network" window (where you see "Local Area Connection 1", etc. Just shift click on the NICs in question and you can right click and select bridge. (BTW this also works with XP)
6. Use a basic linux VM and setup the bridge as follows (to bridge eth1 and eth2): brctl addbr br0 brctl addif br0 eth1 brctl addif br0 eth2 ifconfig br0 up
