From: Guyler, Rik (rguyler@shp-dayton.org)
Date: Thu Sep 22 2005 - 08:48:48 GMT-3
Dave, I've done this and really it's not complicated really. In my
installations, the ADSL (or whatever cheap broadband was in use) was used to
create a lan-to-lan VPN between the sites to be used as a backup circuit to
some form of serial circuit.
I always used PIX's for the firewall/VPN device but it really doesn't matter
as that part is transparent to the routers behind them. I then created a
tunnel ( typically IPIP) between routers through the VPN to give them
another "local" connection. I generally hard-coded the neighbors and
adjusted the metric a little to make the serial preferred over the VPN and
that's about it! Of course there are some details I left out, particularly
routing issues, but they should be minor for you if you're on this list and
they really depend on how you set the routers up. I typically specified
separate physical Ethernet interfaces, much like an inside and outside
designation. For me, this kept the addressing and routing issues more
straight forward knowing that I would not be the only one supporting this
solution. And of course, adding additional resiliency, such as VRRP/HSRP
further complicated things a bit but a modular approach to the technologies
makes it pretty straight forward.
HTH,
Rik
-----Original Message-----
From: Schulz, Dave [mailto:DSchulz@dpsciences.com]
Sent: Wednesday, September 21, 2005 9:49 PM
To: Cisco certification
Subject: ADSL backup
Group -
I am not sure if this is something that is going to be on the lab, but may
be more of an issue after the ISDN disappears. I am seeing more companies
put in ADSL for backup. Does anyone have a sample config or information on
the DOC cd's for this?
Dave Schulz,
Email: dschulz@dpsciences.com <mailto:dschulz@dpsciences.com >
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