Date: Tue, 13 Jul 1999 10:30:17 +0200 From: "laurens van alphen (craxx)" <lva@dds.nl> To: <freebsd-isp@freebsd.org> Subject: ADSL with ISDN backup. What is the best way to go? Message-ID: <000701becd09$efa72160$0a0010ac@craxx.com>
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Hello,
We are looking in to using ADSL for our new Internet connection.
Although we live in the Netherlands and Telco's are usually
somewhat less crappy than the US ones ;P, we still want ISDN backup.
The following situation will be installed (i suggest you
use a fixed pitch font):
(the internet)
|
(some router)
|
[ A:upstream cisco 7200 ]---------------+
| |
[ B:upstream cisco 6200 ] |
| |
(adsl) (isdn)
| |
[ C:cisco 675 asdl (as bridge) ] |
| |
(ethernet) |
| |
[ D:freebsd machin w/ 2nic+isdn ta ]
|
|
[ E:freebsd firewall (ipfilter), 3 nics ]
| |
(ethernet dmz) (other subnets)
| |
Basically D is our main gateway that will route
ip packets through C (adsl bridge at our location)
to B (big cisco dsl mama).
What we want is our gateway (D) to dial into A (the 7200
at our upstream) when the connection between A en D fails.
Several questions:
- How should we determine the failure? Some low
level protocol, does CBOS (cisco broadband operating
system in C) provide anything we can use? Will, for
example BSD notice if the ADSL link is down eventhough
the bridge (C) is in between (time-out) ?
- Can we use static routing w/ a higher metric or
are we going RIP, OSPF or BGP4?
- Any know issues when using ISDN (sync ppp) between FreeBSD
and a Cisco?
Thanks,
--
laurens van alphen
alphen@craxx.nl
The box said: 'Requires Windows 98, NT, Linux or better'
so I installed FreeBSD.
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