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Hi,
is it possible to bridge two tap interfaces?
I´ve tried the following:
Server:
- br0 bridges tap0 and tap1
>brctl show br0
bridge name bridge id STP enabled interfaces
br0 8000.965a950332fc no tap1
tap0
>ifconfig (eth0 and lo0 removed)
br0 Link encap:Ethernet HWaddr 96:5A:95:03:32:FC
inet addr:192.168.210.1 Bcast:192.168.210.255 Mask:255.255.255.0
inet6 addr: fe80::c496:faff:fe5b:232/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:31825 errors:0 dropped:0 overruns:0 frame:0
TX packets:31413 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2620884 (2.4 MiB) TX bytes:3025770 (2.8 MiB)
tap0 Link encap:Ethernet HWaddr C6:96:FA:5B:02:32
inet6 addr: fe80::c496:faff:fe5b:232/64 Scope:Link
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:33208 errors:0 dropped:0 overruns:0 frame:0
TX packets:21452 errors:0 dropped:8 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:3220056 (3.0 MiB) TX bytes:2067128 (1.9 MiB)
tap1 Link encap:Ethernet HWaddr 96:5A:95:03:32:FC
inet6 addr: fe80::945a:95ff:fe03:32fc/64 Scope:Link
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:9991 errors:0 dropped:0 overruns:0 frame:0
TX packets:9981 errors:0 dropped:19 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:960302 (937.7 KiB) TX bytes:959266 (936.7 KiB)
Clients:
client1 connects to tap0 and client2 connects to tap1
Client1 gets ip 192.168.210.100
Client2 gets ip 192.168.210.90
ping from client 1 to 192.168.210.1 is ok
ping from client 2 to 192.168.210.1 is ok
ping from client 1 to 192.168.210.90 (client 2) is not ok
>brctl showmacs br0
port no mac addr is local? ageing timer
1 74:61:70:bc:53:00 no 0.77
2 96:5a:95:03:32:fc yes 0.00
1 c6:96:fa:5b:02:32 yes 0.00
2 de:7e:7d:ca:ff:ac no 183.74
tcpdump sees ping requests on tap0 and br0 but not on tap1
The arp table on client 1 knows mac address from client 2, so broadcasts
The arp request from client 1 about client 2 can be seen by tcpdum on
tap1, so broadcasts will be forwarded.
Why br0 will not forward the packets from client1 to client2 ?
Any help?
regards,
Michael
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