RE: ISA and ISDN backup connection
- From: "Raminder Chhatwal" <rami@xxxxxxxxxxxxxxxxxxxxx>
- To: "'[ISAserver.org Discussion List]'" <isalist@xxxxxxxxxxxxx>
- Date: Thu, 13 Feb 2003 12:46:50 -0500
Hi all,
I think this can be done by having 2 static routes with costs associated.
Keeping the route using ISDN connection at a ahigher cost than the route
going through DSL.
As long as the DSL is up, all traffic will go through DSL, but as soon as
the DSL connection breaks, the ISDN connection will be activated.
Actually using CIsco thjis can be done in 3 ways.
I can help if you want this to be done using cisco ISDN.
Thanks
rami
-----Original Message-----
From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxxxxxxxxx]
Sent: Thursday, February 13, 2003 12:34 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: ISA and ISDN backup connection
http://www.ISAserver.org
Hi Casey,
I don't know if you can do it with one machine (because I've never tried
it or investigated the possibility), but you can do it easily with two
machines and OSPF. When the low cost route is detected as unavailable,
it should direct packets the demand dial interface on the second machine
that has the ISDN modem installed. You don't need ISA Server, since ISA
Server doesn't manage VPN gateways connections anyway.
Let us know what you find out about the single machine config.
Thanks!
Tom
Thomas W Shinder
www.isaserver.org/shinder
ISA Server and Beyond: http://tinyurl.com/1jq1
Configuring ISA Server: http://tinyurl.com/1llp
-----Original Message-----
From: Friese, Casey [mailto:cfriese@xxxxxxxxxxxxx]
Sent: Thursday, February 13, 2003 8:59 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] ISA and ISDN backup connection
http://www.ISAserver.org
I have an ISA-to-ISA VPN connection setup between a remote office and
our corporate HQ.
The corporate HQ is connected to the internet using a T1 that goes
directly into the ISA
The remote office has DSL for an internet connection going directly into
the ISA.
The tunnel comes up and users from both networks can communicate with
eachother - everything is fat, dumb and happy,
except when the DSL connection decides to go to sleep.
Because of the unreliable nature of the DSL connection and lack of any
other high-speed internet service in the remote office's location we
have decided to purchase 2 external ISDN modems to use as backup
connections in the event that the DSL connection craps out.
Each ISDN devices is identical, made by MultiTech and connects to the
serial port of each ISA server.
What I am looking for is guidance with how to configure RRAS so when the
Tunnel is detected as being unreachable, RRAS will fire off the ISDN
connection to connect to the ISDN modem in the corporate HQ. If this is
beyond RRAS's capability, is there another means, short of initiating
the connections manually, while utilizing the existing hardware?
Any help would be greatly appreciated.
Thank You,
-Casey Friese
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