[mrtg] Re: Graph is different
Beast
beast at i6x.org
Sat Jun 11 05:46:20 MEST 2005
PAUL WILLIAMSON wrote:
>>>>Beast <beast at i6x.org> 06/10/05 9:40 AM >>>
>>Since it only 2 interfaces, the graph should be identical, but
>>not right now.
>
>
> That is a very bad assumption. Rarely is this the case for
> our internet facing routers. Even within our network,
> the internal eth (or fa, or ge) interfaces are sometimes not
> the same as the "outgoing" ones.
Usualy it is same, if there's a different, it should be not that big.
>
>
>>For example incoming on S0 is 29 kbps but outgoing in ETH0
>>is 490kbps and it happen most of the time, what could be
>>the reason?
>
>
> Virus on a PC. Something wild going on inside your LAN.
> Start up something like ntop or ethereal and span a port
> to capture data on the lan side.
>
It could be virus(less likely) or cron job,most PC and servers are linux
and this is not internet gateway, its only link to another branch.
>
>>I already tried to restart router or clear the counter but
>>it still happen.
>
>
> Because all the router is doing is reporting the packets it
> is handling. You haven't done anything to figure out
> WHY there is lots more traffic internally.
>
What I still did not understand is why it happen on the eth interface
only, what traffic is generated/requested by/from the router?
--
--beast
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