[Bridge] Bridge Woes...

Chris U chris.uyehara at gmail.com
Thu Oct 5 00:59:52 PDT 2006


Hi Jothis,

1. When the laptop is connected to the bridge, the laptop cannot ping the
router or any other machine in the subnet.
2. Yes, I have set the gateway of the laptop to 128.171.103.1

By chance do you know how to debug the the bridge?

Mahalo,
Chris

On 10/4/06, Jothis T.V <jothistv at gmail.com> wrote:
>
> Hi Chris,
>
> Just wanted to ensure some basic points here.
>
> 1. Can the laptop ping the router OR any other machine in the subnet
> 128.171.103.0/24?
> 2. Also, hope that you have set the gateway of the laptop as 128.171.103.1
> .
>
> regards,
> Jothis
>
>
> On 10/5/06, 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 la=
ptop
> > 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
> >
> >
> >
> > _______________________________________________
> > Bridge mailing list
> > Bridge at lists.osdl.org
> > https://lists.osdl.org/mailman/listinfo/bridge
> >
> >
> >
>
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