Hi, What is the easiest way to bridge between two user-space processes that talk directly to Ethernet interfaces? I have two applications that write/read Ethernet frames to/from Linux Ethernet ports (e.g. eth0). The applications can successfully talk to each other when they run on two machines connected over Ethernet. I would like to be able to test them on a single machine without employing the physical network. Would TAP + bridging do the job? If so, what am I doing wrong? Linux 2.4.20, root user. I set up tap interfaces like this: >tunctl tap4 >ifconfig tap4 4.4.4.4 promisc up >tunctl tap5 >ifconfig tap5 5.5.5.5 promisc up I then set up the bridge and add the tap interfaces to it: >brctl addbr tapbr >brctl setfd tapbr 0 >brctl sethello tapbr 0 >brctl stp tapbr off >ifconfig tapbr 7.7.7.7 netmask 255.255.255.0 up >brctl addif tapbr tap4 >brctl addif tapbr tap5 I then do a ping over tap4: >ping -I tap4 8.8.8.8 and tcpdump on tap5: >tcpdump -i tap5 and see nothing. Shouldn't I see the ping requests on tap5 now? BTW, if I enable STP on the bridge I start seeing the STP frames on tap5. Thanks! Derek __________________________________ Do you Yahoo!? New and Improved Yahoo! Mail - Send 10MB messages! http://promotions.yahoo.com/new_mail
