Subject: Re: SLIP packet routing problems
To: Brett Lymn <blymn@awadi.com.AU>
From: Stephen Champion <steve@herb.kuru.com>
List: netbsd-help
Date: 03/17/1995 01:20:03
> According to Steven Vetzal:
>
> >For example, from the SL/IP'd system (I'll say remote host) I can ping
> >204.191.16.2 (my NetBSD Box), 204.191.16.9 (the NetBSD end of the SL/IP),
> >but that's about it. I can't ping the router at 204.191.16.1 or the bridge
> >at 204.191.16.253. The netmasks are all set for 255.255.255.0...
>
> OK now we are getting somewhere. The next thing to check is if the
> routers know that to get to your NetBSD box they need to use
> 204.191.16.9 as the gateway. I would guess that the router just sees
> the machine 204.191.16.2 on the same subnet and blasts the packet out
> the correct interface when it should be forwarding the packet to
> 204.191.16.9 to be sent down the SL/IP interface. What you need to do
> is:
>
> a) update the router's routing tables to define 204.191.16.9 to be
> the gateway for 204.191.16.2
>
> OR b) put 204.191.16.2 on an unallocated
> subnet and tell the router that 204.191.16.9 is the gateway for
> that subnet.
>
> If you do not have control of the router then you are more or less
> stuck :-(
>
> --
> Brett Lymn, Computer Systems Administrator, AWA Defence Industries
Something being completely misunderstood here is that in this case,
the NetBSD-i386 is the SLIP server and is on the local net, and the slip
client is Windows.
Still, the idea is correct - to get to the SLIP host, the
router(s) must know that the client's gateway is the server, and this
can be achieved by changing tables or subnetting and changing tables. I
missed that part when I was trying to help earlier.
What I'm wondering about is that in the scripts Steven posted
earlier, slattach was missing. Is slattach not needed on the server
side of a SLIP link?
If it wasn't there, and it is needed, how did he get so
far as to ping the NetBSD server from the client without it?
--
// Stephen Champion Software Eng, *ix Admin, OS Design
// schampion@hampshire.edu Hampshire College - Amherst, MA
// steve@herb.kuru.com Amiga 3000/25 NetBSD 1.0
#define Disclaimer "This product is completely without warranty."