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Re: COM21 is killing me with ARP



On Wed, Jun 13, 2001 at 12:01:23PM +0200, Sebastiaan wrote:
> a couple of days ago I installed a COM21 cable modem. Although I can
> internet without problems, the modem itself is sending me endless ARP
> requests, while my computer does not answer them. I analysed the data with

I have a COM21 and I have the same problem.  You'll notice that the TX
light on your NIC will never stop.  It never used to be a major problem
with my ne2k-pci NIC (until the NIC got toasted for one reason or
another).  After that I switched to a 3c905*, which seemed to work great
but would go dead after about 15 minutes (presumably because of the arp
bombardment).

My solution was to reset with interface with a cron job every 15
minutes.  It's a total rat-fsck solution, but it works.

> 
> This makes me nervous. 212.127.*.* is my ISP cable modem network. What is
> this, can I stop it?
> 

I'm not sure it comes from one source.  If I tcp dump I see many 'arp
who has xxx.xxx.xxx.xxx tell xxx.xxx.xxx.xxx' and the ip addresses jump
around all over the place.  Not sure how to stop it.

g

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