[Bridge] Ubuntu: network bridging between wireless and wired connection fails
Jochen Hebbrecht
jochenhebbrecht at gmail.com
Tue Apr 28 14:16:56 PDT 2009
Richard,
After rebooting a second time, eth1 isn't appearing in the routing tabel
any longer. The bridge seems to be working perfectly now!
However, I'm not able to retreive any DHCP offers.
I did some packet monitoring:
br0
1 0.000000000 fe80::20a:e4ff:feae:7e4c ff02::2 ICMPv6 Router solicitation
2 24.824098000 0.0.0.0 255.255.255.255 DHCP DHCP Discover - Transaction ID 0xa117a72
3 28.824043000 0.0.0.0 255.255.255.255 DHCP DHCP Discover - Transaction ID 0xa117a72
4 33.685106000 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
5 33.688946000 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
6 33.692700000 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
7 33.698081000 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
8 33.701656000 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
9 33.705492000 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
10 33.708885000 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
11 33.712502000 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
12 33.716242000 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
13 33.719929000 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
14 38.824050000 0.0.0.0 255.255.255.255 DHCP DHCP Discover - Transaction ID 0xa117a72
15 48.824039000 0.0.0.0 255.255.255.255 DHCP DHCP Discover - Transaction ID 0xa117a72
16 56.768033000 Wistron_ae:7e:4c Broadcast ARP Who has 169.254.7.81? Tell 0.0.0.0
17 57.992048000 Wistron_ae:7e:4c Broadcast ARP Who has 169.254.7.81? Tell 0.0.0.0
18 59.019954000 Wistron_ae:7e:4c Broadcast ARP Who has 169.254.7.81? Tell 0.0.0.0
19 61.020124000 Wistron_ae:7e:4c Broadcast ARP Gratuitous ARP for 169.254.7.81 (Request)
20 62.004532000 169.254.7.81 169.254.255.255 NBNS Registration NB BACARDI<20>
21 62.004582000 169.254.7.81 169.254.255.255 NBNS Registration NB BACARDI<03>
22 62.004615000 169.254.7.81 169.254.255.255 NBNS Registration NB BACARDI<00>
23 62.004647000 169.254.7.81 169.254.255.255 NBNS Registration NB MSHOME<00>
24 62.004679000 169.254.7.81 169.254.255.255 NBNS Registration NB MSHOME<1e>
25 62.004775000 169.254.7.81 169.254.255.255 BROWSER Host Announcement BACARDI, Workstation, Server, Print Queue Server, Xenix Server, NT Workstation, NT Server, Potential Browser, Unknown server type:23
26 63.023921000 Wistron_ae:7e:4c Broadcast ARP Gratuitous ARP for 169.254.7.81 (Request)
27 64.003996000 169.254.7.81 169.254.255.255 NBNS Registration NB BACARDI<20>
28 64.004033000 169.254.7.81 169.254.255.255 NBNS Registration NB BACARDI<03>
29 64.004054000 169.254.7.81 169.254.255.255 NBNS Registration NB BACARDI<00>
30 64.004075000 169.254.7.81 169.254.255.255 NBNS Registration NB MSHOME<00>
31 64.004097000 169.254.7.81 169.254.255.255 NBNS Registration NB MSHOME<1e>
32 64.004156000 169.254.7.81 169.254.255.255 NBNS Registration NB BACARDI<20>
33 64.004179000 169.254.7.81 169.254.255.255 NBNS Registration NB BACARDI<03>
34 64.004200000 169.254.7.81 169.254.255.255 NBNS Registration NB BACARDI<00>
35 64.004220000 169.254.7.81 169.254.255.255 NBNS Registration NB MSHOME<00>
36 64.004240000 169.254.7.81 169.254.255.255 NBNS Registration NB MSHOME<1e>
37 65.127895000 Wistron_ae:7e:4c Broadcast ARP Who has 195.130.129.165? Tell 169.254.7.81
38 66.004121000 169.254.7.81 169.254.255.255 NBNS Registration NB BACARDI<20>
39 66.004177000 169.254.7.81 169.254.255.255 NBNS Registration NB BACARDI<03>
40 66.004197000 169.254.7.81 169.254.255.255 NBNS Registration NB BACARDI<00>
41 66.004219000 169.254.7.81 169.254.255.255 NBNS Registration NB MSHOME<00>
42 66.004239000 169.254.7.81 169.254.255.255 NBNS Registration NB MSHOME<1e>
43 66.127931000 Wistron_ae:7e:4c Broadcast ARP Who has 195.130.129.165? Tell 169.254.7.81
44 67.127989000 Wistron_ae:7e:4c Broadcast ARP Who has 195.130.129.165? Tell 169.254.7.81
45 70.127967000 Wistron_ae:7e:4c Broadcast ARP Who has 195.130.130.165? Tell 169.254.7.81
46 71.128025000 Wistron_ae:7e:4c Broadcast ARP Who has 195.130.130.165? Tell 169.254.7.81
eth0
1 0.000000 Wistron_ae:7e:4c Broadcast ARP Who has 192.168.1.1? Tell 192.168.1.112
2 19.840146 0.0.0.0 255.255.255.255 DHCP DHCP Discover - Transaction ID 0x8537ad48
3 24.840168 0.0.0.0 255.255.255.255 DHCP DHCP Discover - Transaction ID 0x8537ad48
4 38.840099 0.0.0.0 255.255.255.255 DHCP DHCP Discover - Transaction ID 0x8537ad48
5 45.513321 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
6 45.516537 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
7 45.520384 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
8 45.524058 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
9 45.527325 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
10 45.530872 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
11 45.534676 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
12 45.538019 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
13 45.541774 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
14 45.545417 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
15 45.549231 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
16 51.412036 Wistron_ae:7e:4c Broadcast ARP Who has 169.254.7.81? Tell 0.0.0.0
17 53.360036 Wistron_ae:7e:4c Broadcast ARP Who has 169.254.7.81? Tell 0.0.0.0
18 54.716034 Wistron_ae:7e:4c Broadcast ARP Who has 169.254.7.81? Tell 0.0.0.0
19 56.716135 Wistron_ae:7e:4c Broadcast ARP Gratuitous ARP for 169.254.7.81 (Request)
20 58.716070 Wistron_ae:7e:4c Broadcast ARP Gratuitous ARP for 169.254.7.81 (Request)
21 60.775980 Wistron_ae:7e:4c Broadcast ARP Who has 195.130.129.165? Tell 169.254.7.81
eth1
1 0.000000 fe80::215:ff:fe1f:20a6 ff02::2 ICMPv6 Router solicitation
2 25.983879 0.0.0.0 255.255.255.255 DHCP DHCP Discover - Transaction ID 0xe2640e1c
3 30.983864 0.0.0.0 255.255.255.255 DHCP DHCP Discover - Transaction ID 0xe2640e1c
4 32.949057 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
5 32.952404 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
6 32.957215 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
7 32.960893 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
8 32.964222 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
9 32.970023 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
10 32.973868 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
11 32.977056 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
12 32.981455 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
13 32.985056 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
14 32.988717 192.168.1.1 239.255.255.250 SSDP NOTIFY * HTTP/1.1
15 44.983895 0.0.0.0 255.255.255.255 DHCP DHCP Discover - Transaction ID 0xe2640e1c
16 54.983846 0.0.0.0 255.255.255.255 DHCP DHCP Discover - Transaction ID 0xe2640e1c
17 57.199856 Wistron_ae:7e:4c Broadcast ARP Who has 169.254.7.81? Tell 0.0.0.0
18 58.967801 Wistron_ae:7e:4c Broadcast ARP Who has 169.254.7.81? Tell 0.0.0.0
19 60.039785 Wistron_ae:7e:4c Broadcast ARP Who has 169.254.7.81? Tell 0.0.0.0
20 62.039897 Wistron_ae:7e:4c Broadcast ARP Gratuitous ARP for 169.254.7.81 (Request)
21 64.039860 Wistron_ae:7e:4c Broadcast ARP Gratuitous ARP for 169.254.7.81 (Request)
22 66.107737 Wistron_ae:7e:4c Broadcast ARP Who has 195.130.129.165? Tell 169.254.7.81
23 66.164183 169.254.7.81 169.254.255.255 NBNS Registration NB BACARDI<20>
24 66.164203 169.254.7.81 169.254.255.255 NBNS Registration NB BACARDI<03>
25 66.164222 169.254.7.81 169.254.255.255 NBNS Registration NB BACARDI<00>
26 66.164241 169.254.7.81 169.254.255.255 NBNS Registration NB MSHOME<00>
27 66.164258 169.254.7.81 169.254.255.255 NBNS Registration NB MSHOME<1e>
28 66.164314 169.254.7.81 169.254.255.255 BROWSER Host Announcement BACARDI, Workstation, Server, Print Queue Server, Xenix Server, NT Workstation, NT Server, Potential Browser, Unknown server type:23
You can see the DHCP discovers, but nobody's answering
richardvoigt at gmail.com schreef:
> Do some packet monitoring on your wireless network to see if the DHCP
> request is going out over the air... your problems stem from not
> getting a DHCP address. At first I thought the address given to eth1
> might be interfering with br0... but it seems not.
>
> On Tue, Apr 28, 2009 at 12:36 PM, Jochen Hebbrecht
> <jochenhebbrecht at gmail.com <mailto:jochenhebbrecht at gmail.com>> wrote:
>
>
>
> Ross Vandegrift schreef:
>
> On Tue, Apr 28, 2009 at 02:52:10PM +0200, Jochen Hebbrecht wrote:
>
>
> Okay, thnx!
> Just a small question, I think I need to configure eth0
> and eth1 to
> manual? And not to DHCP?
>
> Like this:
> ----------------------------------------
> auto eth0
> iface eth0 inet manual
>
> auto eth1
> iface eth1 inet manual
> ----------------------------------------
>
>
>
> Ah - I missed that. Yes, you definitely want to set the member
> interfaces to manual.
>
>
> The thing I don't understand then: if you execute a
> dhclient on br0,
> how does br0 know the configuration of eth1? Because
> there's a WPA2
> configuration on it. Will it use that settings too while
> bridging?
>
>
>
> I'll be honest, I'm not sure - I've never done that with
> wpa_supplicant and the debian tools. You might need to activate
> wpa_supplicant in the pre-up for br0.
>
> Check out the manpage for interfaces - it may have more details.
>
>
>
> Ok, I made it myself a little easier by temporarly switching from
> WPA2 to unsecure wireless networking.
>
> I'm having the following configuration:
>
> Code:
>
>
> to lo
> iface lo inet loopback
>
> auto eth0
> iface eth0 inet manual
>
> auto eth1
> iface eth1 inet manual
> wireless-essid ##MY-ESSID##
> wireless-mode managed
>
> auto br0
>
> iface br0 inet dhcp
> bridge_ports eth0, eth1
>
> When I reboot, my interfaces are getting the following config:
>
> Code:
>
>
> br0 Link encap:Ethernet HWaddr 00:0a:e4:ae:7e:4c
> inet6 addr: fe80::20a:e4ff:feae:7e4c/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:87 errors:0 dropped:0 overruns:0 frame:0
> TX packets:23 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0 RX bytes:17544 (17.1 KB)
> TX bytes:3744 (3.6 KB)
>
>
> br0:avahi Link encap:Ethernet HWaddr 00:0a:e4:ae:7e:4c
> inet addr:169.254.7.81 Bcast:169.254.255.255 Mask:255.255.0.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
>
> eth0 Link encap:Ethernet HWaddr 00:0a:e4:ae:7e:4c
> inet6 addr: fe80::20a:e4ff:feae:7e4c/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:3 errors:0 dropped:0 overruns:0 frame:0
> TX packets:89 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000 RX bytes:1770 (1.7
> KB) TX bytes:23069 (22.5 KB)
>
> Interrupt:20 Base address:0xc000
> eth1 Link encap:Ethernet HWaddr 00:15:00:1f:20:a6
> inet addr:192.168.1.111 Bcast:192.168.1.255 Mask:255.255.255.0
>
> inet6 addr: fe80::215:ff:fe1f:20a6/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:223 errors:0 dropped:0 overruns:0 frame:0
> TX packets:99 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000 RX bytes:18762 (18.3
> KB) TX bytes:8392 (8.1 KB)
> Interrupt:21 Base address:0xa000 Memory:c8006000-c8006fff
> lo Link encap:Local Loopback inet addr:127.0.0.1
> Mask:255.0.0.0
> inet6 addr: ::1/128 Scope:Host
> UP LOOPBACK RUNNING MTU:16436 Metric:1
> RX packets:1879 errors:0 dropped:0 overruns:0 frame:0
> TX packets:1879 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0 RX bytes:94956 (92.7 KB)
> TX bytes:94956 (92.7 KB
>
> The bridge looks ok:
>
> Code:
>
> jochus at Bacardi ~ $ sudo brctl show br0
> [sudo] password for jochus: bridge name bridge id
> STP enabled interfaces
> br0 8000.000ae4ae7e4c no eth0
> eth1
>
> My routing table looks like this:
>
> Code:
>
>
> Kernel IP routing table
> Destination Gateway Genmask Flags Metric Ref
> Use Iface
> 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0
> 0 eth1
>
> 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0
> 0 br0
> 0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0
> 0 eth1
> 0.0.0.0 0.0.0.0 0.0.0.0 U 1000 0
> 0 br0
>
> But I'm not able to ping my router ...
>
> Code:
>
> PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
> From 192.168.1.111 icmp_seq=1 Destination Host Unreachable
> From 192.168.1.111 icmp_seq=2 Destination Host Unreachable
> From 192.168.1.111 icmp_seq=3 Destination Host Unreachable
>
> --- 192.168.1.1 ping statistics ---
> 5 packets transmitted, 0 received, +3 errors, 100% packet loss,
> time 4018ms
>
> I don't understand why eth1 is in my routing table. It shouldn't
> be I guess?
> Anybody some idea's?
>
>
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