[LUNI] Networking question -please help

[Richard Reina]

I am still not having any luck wit this.  When I execute /sbin/ifconfig after trying to put the machine on the LAN ( via the method described below ) everything looks exactly the same as the other LAN machines but no pinging is possible.  I'm don't know how to clear the ARP tables.  Can someone suggest some additional steps that would help me switch this laptop over from the internet to the LAN without rebooting?  So far I execute:
   
  #:/sbin/service network stop
  unplug the cable from the router and into the LAN switch
  #:/usr/sbin/setup and manually set it to a valid LAN IP
  #:/sbin/service network start
   
  Anyone know what else I can do?

sjk <sjk at cupacoffee.net> wrote:
  
On Tue, 31 Oct 2006, Richard Reina wrote:

> I have a linux box that stays hooked up to the internet. Once a day I 
> need to hook it up to our private LAN (no outside connection). I take 
> the ethernet cable out of the router and plug it into our switch and use 
> /usr/sbin/setup to assign it and IP address on our LAN. I then execute 
> /sbin/service network restart but I can't communicate with machines on 
> my local LAN -- I can't even ping any of them. If I reboot the machine 
> all is well and I can comunicate with the network. Is there something 
> that I am omitting? Is there a way to change networks without rebooting?
>
> Thanks for any suggestions.
>
> Richard

Most likely, you have have ARPing issues. Next time try clearing the ARP 
table on your linix box -- also check to see if you have ARP from the 
other hosts on the network. Other things you may want to check include 
your local route table -- ensure the netmasks and interfaces are correct 
-- and check your link negotiation -- some cards don't like to auto 
negotiate after the fact and will lock themselves at a particular speep 
and duplex until they are reinitialized.

Good Luck


_____________________________________
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