<< | Thread Index | >> ]    [ << | Date Index | >> ]

Subject: RE: same subnet routing
From: SBNelson,AT,thermeon,DOT,com
Date: Tue, 27 Nov 2001 16:19:18 +0100

The LANs beyond each CIPE system must have different network/subnet
addresses. (Usually you have route commands in ip-up to instruct how to get
to the other end's LAN).  The point-to-point IP addresses (ptpaddr, ipaddr)
can be from the appropriate subnet, or can be from a totally different
range, as they are only used by the two CIPE systems and not by systems on
the LANs (unless you are talking directly to the CIPE system).

> OK, this is probably just lame, but, in an attempt to save some time, I
> decided to make my two subnets the same.  Here's my options file for one
> side (the other being a mirror image of course, names have been changed
> to protect the innocent):
> 
> # the peer's IP address
> ptpaddr         192.168.3.200
> # our CIPE device's IP address
> ipaddr          192.168.3.201
> # my UDP address. Note: if you set port 0 here, the system will pick
> # one and tell it to you via the ip-up script. Same holds for IP 0.0.0.0.
> me              myaddress1.dyndns.org:8181
> # ...and the UDP address we connect to. Of course no wildcards here.
> peer            myaddress2.dyndns.org:8282
> # The static key. Keep this file secret!
> # The key is 128 bits in hexadecimal notation.
> key             ac90de19ab1463d31fa9c0ad99686114
> 
> I can ping and ssh from my address1 to myaddress2 and back again.  But if
> I try to access a machine in the network, it complains:
> 
> [root@mdgw cipe]# ping mountain
> PING mountain.mynet.home (192.168.3.10) from 192.168.3.2 : 56(84)
> bytes of data.
> From mdgw.mynet.home (192.168.3.2): Destination Host Unreachable
> From mdgw.mynet.home (192.168.3.2): Destination Host Unreachable
> From mdgw.mynet.home (192.168.3.2): Destination Host Unreachable
> From mdgw.mynet.home (192.168.3.2): Destination Host Unreachable
> From mdgw.mynet.home (192.168.3.2): Destination Host Unreachable
> From mdgw.mynet.home (192.168.3.2): Destination Host Unreachable
> 
> --- shenendoah.appalachian.home ping statistics ---
> 9 packets transmitted, 0 packets received, +6 errors, 100% packet loss
> 
> Am I just asking for trouble here?  Should I just move one or the other
> private network to a different subnet?
> 





<< | Thread Index | >> ]    [ << | Date Index | >> ]