Bridge between ethernet interface and tap interface
 

Hi,

I have created a TAP interface and a Bridge. My linux system (system 1) has 2 NIC, eth0 and eth1. I have added the TAP interface and eth1 to the bridge. I have another linux system (system 2) connected to eth1 through a switch, both are in the same network. Iam not able to ping to eth1 of system 1 from system 2. The ethereal running on the bridge is able to capture the Echo Request packets. But, when I make eth0 and eth1's IP
address as 0.0.0.0, the ping succeeds. Why is the bridge not able to respond to the ping packets?

Thanks,
Dhanesh.

hi jaya,

a bit unclear.
did you put those 2 NICs under the same bridge (like br0) - or did you put only 1 of them to the bridge and the other 1 as router port?

by bridging - its an layer 2 mechanism, you simply dont need IPs actually (or optionally).

HTH.

Hi,

I have eth0 in route mode, eth1 and tap0 added to the bridge br0.
eth0 and br0 has a valid IP address where as eth1 and tap0 doesnt have an IP.

Thanks,
Jaya Dhanesh.

hi jaya,

ok then, so the problem lies within br0 as switch virtual router.
so being eth0 as in route mode - you need to create routing for those eth0 and br0

HTH.