[Bridge] Bridge Woes...
Chris U
chris.uyehara at hawaii.edu
Thu Oct 5 12:07:14 PDT 2006
Hi Stephen,
Setting IP address via: ifconfig br0 128.171.103.11 netmask 255.255.255.0 up
eth0 and eth1 do not have an IP assigned.
---
eth0 Link encap:Ethernet HWaddr 00:13:72:FC:84:36
inet6 addr: fe80::213:72ff:fefc:8436/64 Scope:Link
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:237 errors:0 dropped:0 overruns:0 frame:0
TX packets:220 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:23977 (23.4 KiB) TX bytes:28139 (27.4 KiB)
Interrupt:169
eth1 Link encap:Ethernet HWaddr 00:13:72:FC:84:37
inet6 addr: fe80::213:72ff:fefc:8437/64 Scope:Link
UP BROADCAST PROMISC MULTICAST MTU:1500 Metric:1
RX packets:24 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2481 (2.4 KiB) TX bytes:0 (0.0 b)
Interrupt:225
---
Kernel Version: 2.6.9-42.0.2.ELsmp x86_64
Hardware... neither are wireless devices.
04:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5721 Gigabit
Ethernet PCI Express (rev 11)
05:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5721 Gigabit
Ethernet PCI Express (rev 11)
On 10/5/06, Stephen Hemminger <shemminger at osdl.org> wrote:
>
> On Wed, 4 Oct 2006 18:20:43 -1000
> "Chris U" <chris.uyehara at gmail.com> wrote:
>
> > Hi List,
> >
> > I have setup a bridge labeled br0. br0 has an ip address assigned to it.
> My
> > network looks something similar to this...
> >
> > |--------------------| |--------------------|
> > |------------------|
> > | laptop | | bridge |
> > | router |
> > | 128.171.103.10/24 | -----> (eth1)| 128.171.103.11/24
> |(eth0) ----->
> > | 128.171.103.1/24 |
> > | statically assignd | | statically assignd |
> > | tested / working |
> > |--------------------| |--------------------|
> > |------------------|
> >
> > Now for the PROBLEM! The bridge can access IP's outside of the subnet
> via
> > eth0 of the bridge, ie - pinging 128.171.1.1, 128.171.3.13,
> 64.233.167.99.
> > The laptop cannot ping the previously listed IPs. The only thing the
> laptop
> > can ping is 128.171.103.11. It's very odd... I tried running tcpdump on
> the
> > bridge. From the bridge I could see the laptop pinging the bridge but I
> > couldn't see the laptop pinging any other IPs. So basically I have a
> bridge
> > that's not really working but the bridge utils show that its working...
> any
> > help would be greatly appreciated!
> >
> > (The laptop works when taken off the bridge and connected to the router,
> the
> > iptables default policy is ACCEPT and the rules are FLUSHED.)
> >
> > Thanks for taking time to read this!
> >
> > ###brctl show br0
> > bridge name bridge id STP enabled interfaces
> > br0 8000.001372fc8436 no eth0
> > eth1
> >
> > ###brctl showstp br0
> > br0
> > bridge id 8000.001372fc8436
> > designated root 8000.001372fc8436
> > root port 0 path
> cost 0
> > max age 19.99 bridge max age
> > 19.99
> > hello time 1.99 bridge hello time
> > 1.99
> > forward delay 14.99 bridge forward delay
> > 14.99
> > ageing time 299.95
> > hello timer 0.03 tcn timer
> > 0.00
> > topology change timer 0.00 gc timer
> > 7.97
> > flags
> >
> >
> > eth0 (1)
> > port id 8001 state
> > forwarding
> > designated root 8000.001372fc8436 path
> cost 100
> > designated bridge 8000.001372fc8436 message age timer
> > 0.00
> > designated port 8001 forward delay timer
> > 0.00
> > designated cost 0 hold timer
> > 0.00
> > flags
> >
> > eth1 (2)
> > port id 8002 state
> > forwarding
> > designated root 8000.001372fc8436 path
> cost 100
> > designated bridge 8000.001372fc8436 message age timer
> > 0.00
> > designated port 8002 forward delay timer
> > 0.00
> > designated cost 0 hold timer
> > 0.00
> > flags
>
>
> How are you setting IP addresses on the bridge.
> You need to NOT assign IP addresses to eth0, eth1 and assign
> an IP address to bridge pseudo device.
>
> What kernel version?
> What hardware is being used for eth0 and eth1? Are either one
> of these wireless (802.11) devices?
>
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