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From: murray@bullwinkle.raleigh.ibm.com (Charlie Murray)
Subject: Re: [386bsd] router configuration ?
Sender: news@sernews.raleigh.ibm.com
Message-ID: <1992Dec10.173400.29309@sernews.raleigh.ibm.com>
Date: Thu, 10 Dec 1992 17:34:00 GMT
References: <ZZO910W@desert.in-berlin.de>
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Organization: IBM, Research Triangle Park, North Carolina
Lines: 47
In article <ZZO910W@desert.in-berlin.de> Steffen Hellwig writes:
> please imagine the following situation:
> I have three unix machines, say A, B, C (last both run 386bsd).
> A and B are connected via slip, B and C via Ethernet (ne2000).
> Networking (ping, telnet, ftp etc.) works from A<->B and from B<->C
> (both ways).
> But i can't ping C from A or A from C.
> Of corse i set the routes on A and C like
> A: route add C B
> C: route add A B
Did you add host routes or network routes? A network route add would be
like the following on A:
route add network_address_for_ethernet address_for_B_slip
versus a host route like the following:
route add address_for_C_ethernet address_for_B_slip
> netstat -r on B (the router) says:
> A<->sl0
> B<->ne0
I assume this is a typo and you meant A<->sl0 and C<->ne0. Can you ping
the far interfaces of B from A and C (i.e. can you ping ne0 on B from A,
and sl0 on B from C) to see if B is actually routing?
> It seems that packages arrive on sl0 and ne0 (netstat -i),
> but they are not forwardet to the target machine.
You might try using "netstat -I sl0 1" and "netstat -I ne0 1" to see
where the packets are going. Also, using "ping -f" will get you a
higher packet count that is easier to see on the netstat.
I know none of this describes what the problem might be, but hopefully
you can use these suggestions to gain more information.
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Charlie Murray CompuServe: 73707,1752
Consulting at IBM Internet: 73707.1752@compuserve.com
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