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Date:      Tue, 23 Jan 2001 12:26:49 -0500 (EST)
From:      "Nathan Vidican" <webmaster@wmptl.com>
To:        questions@freebsd.org
Subject:   Static subnet routing over PPPOE
Message-ID:  <200101231726.MAA43941@mail2.wmptl.com>

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I would like to replace our current Cisco Pro 1004 router with a 
FreeBSD box. The reason being, we want to move from ISDN to DSL, but 
don't particularily feel like purchasing another router if it can be 
avoided. My question I guess, is how does one setup the routing so as 
to route through an interface which does not have an IP address? The 
Cisco Pro 1004 router we have uses this configuration:

ip subnet-zero
isdn switch-type basic-ni1
!
interface Ethernet0
 ip address 216.94.6.25 255.255.255.248
!
interface BRI0
 ip unnumbered Ethernet0
 encapsulation ppp
 no ip route-cache

This works well, leaving the IP address '216.94.6.25' addressed to the 
ethernet port on the ISDN router, and routing through the BRI0 
interface to the default route. But to move over to DSL, I'd have to 
use PPPOE authentication. Here's what I'm thinking: ISP sets up a PPPOE 
account which assigned the IP address of the 'router', this address 
would then be bound to the NIC on the LAN side of the network. Thus 
leaving the actual NIC which carries the PPPOE connection unbound to a 
specific IP address; I would then have to do something like: route add 
0.0.0.0 xxx.xxx.xxx.xxx and route add xxx.xxx.xxx.xxx ed1, (where ed1 
is the PPPOE interface). This would mimmick the setup of the Cisco 
router currently implemented, but would it work? If so, how does one 
actually configure the FreeBSD machine to bring up a link on a NIC, but 
not bind it to an address?

-- 
Nathan Vidican
webmaster@wmptl.com
Windsor Match Plate & Tool Ltd.
http://www.wmptl.com/


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