Re: routing woes
From: HisNameWasRobertPaulson (kalis_anon_REMOVE__at_hotmail.com)
Date: 11/10/04
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Date: Wed, 10 Nov 2004 11:39:22 -0700
So you have two interfaces that are on the same subnet??
I don't recommend doing that ever. Plays havoc with routing and would
definatly cause what you are experiencing.
mike
"/dev/null" <dev.null@BeginThread.com> wrote in message
news:6Dbkd.77881$R05.59739@attbi_s53...
> > Ya, thats what I am getting at. If you are not seeing those icmp
replies,
> > (and after looking at your routing table) I think maybe packets are
> getting
> > confused as to which interface to exit for the return trip. Is the /25
> > network out eth0, or is it out eth1 - it can't be both, that much is
> > certain.
>
> right.
>
> > Why don't you try flushing your arp cache, then pinging one of those
> trouble
> > boxes while running tcpdump. It may take a couple times, but after a
> couple
> > flushes, you may discover the arp broadcast going out the wrong
interface,
> > and thus the icmp fails. This could possible explain the intermittent
> nature
> > of the problem. But in that case, the routing table is not to blame, but
> the
> > interfaces's ip setup to begin with.
>
> I'll have to try that out the next time I can find a window to slip that
.91
> back behind my linux router.
>
> > But again, I don't have a real clear picture of your network, so I could
> be
> > totally wrong. But I maintain the duplicate routes going out two
seperate
> > interfaces will produce some wierd results, unless running routing
> > protocols, such as rip or ospf to keep track of metrics/routes...
> > Also, just making sure here... your eth1 and eth0 are on different
> subnets,
> > right? (it's hard to tell with x.x.x.# notation)
>
> no, all x.x.x are the same numbers.
>
>
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