On Sun, 24 Apr 2011 17:04:47 +0200 Ireneusz SzczeÅniak <irek.szczesniak@xxxxxxxxx> wrote: > Hi, > > I'm creating a bridge, and then add to it two tap interfaces. No > physical interface is added to the bridge. These are the commands: > > brctl addbr test > ip tuntap add mode tap tap0 > ip tuntap add mode tap tap1 > ifconfig test up > ifconfig tap0 up > ifconfig tap1 up > brctl addif test tap0 > brctl addif test tap1 > > The problem is that the bridge doesn't seem to work correctly. I sent > through tap0 some broadcast frames (WOL frames), and they didn't reach > tap1. I was sending packets with: > > etherwake -b -i tap0 00:00:00:00:00:00 > > The tshark command for tap0 showed the frames being sent with tap0, > but another tshark for tap1 didn't show them. > > Then I added to tap0 the IP address 192.168.10.1/24, and did: > > arping 192.168.1.2 > > I saw ARP request broadcast frames on tap0, but they didn't reach tap1. > > This is the output of ifconfig for test, tap0, and tap1 interfaces: > > root@computer:~# ifconfig test > test Link encap:Ethernet HWaddr 02:07:b1:eb:2c:2a > inet6 addr: fe80::944b:d9ff:fe10:b240/64 Scope:Link > UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1 > RX packets:0 errors:0 dropped:0 overruns:0 frame:0 > TX packets:19 errors:0 dropped:0 overruns:0 carrier:0 > collisions:0 txqueuelen:0 > RX bytes:0 (0.0 B) TX bytes:3377 (3.2 KiB) > > root@computer:~# ifconfig tap0 > tap0 Link encap:Ethernet HWaddr 02:07:b1:eb:2c:2a > inet addr:192.168.10.0 Bcast:192.168.10.255 Mask:255.255.255.0 > inet6 addr: fe80::7:b1ff:feeb:2c2a/64 Scope:Link > UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1 > RX packets:0 errors:0 dropped:0 overruns:0 frame:0 > TX packets:0 errors:0 dropped:278 overruns:0 carrier:0 > collisions:0 txqueuelen:500 > RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) > > root@computer:~# ifconfig tap1 > tap1 Link encap:Ethernet HWaddr b2:ee:2c:f9:d5:0d > inet6 addr: fe80::b0ee:2cff:fef9:d50d/64 Scope:Link > UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1 > RX packets:0 errors:0 dropped:0 overruns:0 frame:0 > TX packets:0 errors:0 dropped:19 overruns:0 carrier:0 > collisions:0 txqueuelen:500 > RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) > > The output of the brctl: > > root@computer:~# brctl show > bridge name bridge id STP enabled interfaces > pan0 8000.000000000000 no > test 8000.0207b1eb2c2a no tap0 > tap1 > root@computer:~# brctl showmacs test > port no mac addr is local? ageing timer > 1 02:07:b1:eb:2c:2a yes 0.00 > 2 b2:ee:2c:f9:d5:0d yes 0.00 > > The output of route: > > root@computer:/home/iszczesniak# route -n > Kernel IP routing table > Destination Gateway Genmask Flags Metric Ref Use Iface > 192.168.2.0 0.0.0.0 255.255.255.0 U 2 0 0 eth1 > 192.168.10.0 0.0.0.0 255.255.255.0 U 0 0 0 tap0 > 169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 eth1 > 0.0.0.0 192.168.2.1 0.0.0.0 UG 0 0 0 eth1 > > What am I doing wrong? > > > Thanks, > Irek > 00:00:00:00:00:00 is an invalid ethernet address and is always dropped by bridge to be in compliance with standards. Use a real ethernet address, for kernel devices there is a convenience routine to generate a random ethernet address. -- _______________________________________________ Bridge mailing list Bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/bridge
