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Date:      Fri, 30 Oct 1998 14:36:42 -0500 (EST)
From:      George Uhl <uhl@mamba-e.gsfc.nasa.gov>
To:        freebsd-questions@FreeBSD.ORG, Bruce.H.Kwan@jpl.nasa.gov
Subject:   Re: SPPP over RISCom/N2
Message-ID:  <199810301936.OAA11555@mamba-e.gsfc.nasa.gov>

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Hiding IP addresses makes it hard to figure out what is going
on exactly.  Are you sure both interfaces are up when you ping?

I had this working a year or so ago.  I can't remember all
the details but it wasn't hard to get the interfaces configured
to communicate. You have machine2's sr0 config'ed as a point-to-
point?

inet xx.xx.xx.176 --> xx.xx.xx.26 netmask 0xffffffff

John Hay wrote the driver orignally but I don't know if it was
changed since I played with it.  I made my own changes so that I
could change the line speed with an ioctl from an ifconfig
command without modifying the driver and rebuilding the kernel.
Unfortunately, that was on my last job and I had to leave my
software there.

I'd like to help you but I'm digging way deep into neuron space 
and more info would help.

George Uhl
NASA GSFC

> From majordom@FreeBSD.ORG Fri Oct 30 14:11 EST 1998
> Delivered-To: vmailer-questions@freebsd.org
> Date: Fri, 30 Oct 1998 10:30:20 -0800
> From: "Bruce H. Kwan" <Bruce.H.Kwan@jpl.nasa.gov>
> MIME-Version: 1.0
> To: freebsd-questions@FreeBSD.ORG
> Subject: SPPP over RISCom/N2
> Content-Transfer-Encoding: 7bit
> X-Loop: FreeBSD.ORG
> 
> Hi-
> 
> I am trying to use the RISCom/N2 driver that comes with the
> 2.2.7 distribution. The driver configures the serial card as an
> SPPP network interface.  I have two PC's with RISCom cards
> and I am simply trying to make a connection between the two
> machines. I have done the proper ifconfig and route configuration
> calls (I think) and I get the following when I do an ifconfig -a
> and a netstat -r:
> 
> (I've excluded the actual IP /ethernet addresses...)
> 
> machin1# ifconfig -a
> ep0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
>         inet xx.xx.xx.26 netmask 0xffffff00 broadcast xx.xx.xx.255
>         ether xx:xx:xx:xx:xx:xx
> sr0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1500
>         inet xx.xx.xx.26 --> xx.xx.xx.176 netmask 0xffffffff
> sr1: flags=8010<POINTOPOINT,MULTICAST> mtu 1500
> tun0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500
> sl0: flags=c010<POINTOPOINT,LINK2,MULTICAST> mtu 552
> ppp0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500
> lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
>         inet 127.0.0.1 netmask 0xff000000
> 
> machine1# netstat -r
> Routing tables
> 
> Internet:
> Destination        Gateway            Flags     Refs     Use     Netif
> Expire
> default            default-gateway   UGSc        1        0       ep0
> localhost          localhost          UH          0        4       lo0
> xx.xx.xx/24      link#1             UC          0        0
> machine1           xx:xx:xx:xx:xx   UHLW        0       38       lo0
> machine2            sr0                UHS         0        8       sr0
> 
> When I attempt to ping between the machines, I get:
> 
> machine1# ping machine2
> PING machine2 (xx.xx.xx.176): 56 data bytes
> ping: sendto: Network is down
> ping: sendto: Network is down
> 
> I configured machine2 to speak to machine 1 via
> its own sr0 interface as well.
> 
> Do you know what I might be missing in my understanding
> of how SPPP is used to configure and support the RISCom/N2
> card? Any comments or suggestions would be greatly appreciated.
> 
> Thanks!
> 
> Bruce Kwan
> 
> 
> 
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