Wired and Wireless with a notebook

Nathan England nathan at paysonlinux.org
Thu Apr 20 01:30:16 MST 2006


I have a script that runs mii-tool and greps for a 'Link OK' and if it doesn't 
find it, then it activates my wireless...

Try something like that.

On Thursday 20 April 2006 01:20, Dazed_75 wrote:
> On 4/19/06, Jared Anderson <pluggedIn at thegoldenedge.com> wrote:
> > On Tuesday 18 April 2006 5:12 pm, Dazed_75 wrote:
> > > My laptop (Toshiba 5105-S701) has both wired ethernet and built-in
> > > 802-11b.  At home I normally plug in the wired ethernet.  The Wireless
> > > is used when I have the laptop away from the computer room (wheter
> > > home or away).  The issue seems to be that when I bring up the system
> > > (Ubuntu 5.10) with the ether cable plugged in it finds both
> > > interfaces, leaves both enabled and refuses to resolve URLs until I
> > > use [menu] System/Administration/Networking to de-activate the
> > > wireless.
> > >
> > > Note that both wireless and wired interfaces are being issued separate
> > > IPs (e.g. 192.168.1.106 and 107) by the same Linksys router (which
> > > also contains the AP) and should be issuing the same DNS IPs from my
> > > ISP (/etc/resolv.conf only contains the usual pair).  One would think
> > > the system could use EITHER interface succussfully.  Something is
> > > getting in the way and I would love to learn how to avoid this issue.
> > > BTW, this issue is not unique to me.  I have talked to several people
> > > with the same problem including at least one other PLUG member.
> > >
> > > Suggestions or references anyone?
> >
> > While at home, before disabling one of the interfaces, can you run of the
> > following commands and then post the results?
> >
> > netstat -rn
> > -or-
> > route -vn
> > -or-
> > cat /proc/net/route
> > ---------------------------------------------------
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>
> Interestingly, my netstat (Ubuntu 5.10) does not seem to have a -m
> option.  Also, I realize you said "OR" but too much is better than not
> enough and since they produced slightly different output, Here is all
> of it:
>
> $ netstat -i
> Kernel Interface table
> Iface   MTU Met   RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR
> Flg eth0   1500 0       113      0      0      0       78      0      0    
>  0 BMRU eth1   1500 0        36      0      0      0        5      0      0
>      0 BMRU lo    16436 0     15546      0      0      0    15546      0   
>   0      0 LRU $ netstat -r
> Kernel IP routing table
> Destination     Gateway         Genmask         Flags   MSS Window  irtt
> Iface 192.168.1.0     *               255.255.255.0   U         0 0        
>  0 eth0 192.168.1.0     *               255.255.255.0   U         0 0      
>    0 eth1 default         myrouter        0.0.0.0         UG        0 0    
>      0 eth1 default         myrouter        0.0.0.0         UG        0 0  
>        0 eth0 $ route -vn
> 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 eth0 192.168.1.0     0.0.0.0         255.255.255.0   U     0      0      
>  0 eth1 0.0.0.0         192.168.1.1     0.0.0.0         UG    0      0     
>   0 eth1 0.0.0.0         192.168.1.1     0.0.0.0         UG    0      0    
>    0 eth0 $ cat /proc/net/route
> Iface	Destination	Gateway
> 	Flags	RefCnt	Use	Metric	Mask		MTU	Window	IRTT
> eth0	0001A8C0	00000000	0001	0	0	0	00FFFFFF	0	0	0
> eth1	0001A8C0	00000000	0001	0	0	0	00FFFFFF	0	0	0
> eth1	00000000	0101A8C0	0003	0	0	0	00000000	0	0	0
> eth0	00000000	0101A8C0	0003	0	0	0	00000000	0	0	0
> $ cat /etc/resolv.conf
> search ph.cox.net
> nameserver 204.127.203.135
> nameserver 216.148.225.135
>
> NOTE: the "search ph.cox.net" is from when I use the laptop at a
> different location.
>
> Just to reconfirm, this is following a powerup with the ethernet cable
> plugged an and the wireless turned on.  At that point I was unable to
> access the internet (ping yahoo.com even failed).  Interestingly after
> capturing this info, moving to this desktop to do the email, I went
> back to the laptop to try pinging the DNS server by IP address and
> found that worked and learned the traffic went over the wireless.  I
> then tried pinging Yahoo.com again and it worked (also via the
> wireless).  This is getting even wierder.
>
> --
>
> Nothing is really work unless you would rather be doing something else.
>   - James M. Barrie
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