Well, worse case scenario, use 56K modem as backup........ point being,
there are ways to provide backup WAN connectivity for not alot of money.
HSRP could be used (as mentioned before), or the modem/ISDN could be
designated as a backup interface. A bit easier to configure than HSRP.....
Mike W.
"Brian" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> ISDN is not so cheap in cali unless you can get Centrex..
>
> Brian "Sonic" Whalen
> Success = Preparation + Opportunity
>
>
> On Thu, 31 May 2001, Michael L. Williams wrote:
>
> > Well, having more than one router connected to the same WAN connection
> still
> > leaves a single point of failure. Where I work, we have hundreds of
> remotes
> > sites, each of which has 2 routers connected together to the remote LAN
> > using HSRP. One router has a frame relay connection, and the other has
an
> > ISDN dial-back up interface to the same WAN destination (Central Site).
> > This way if the primary circuit goes down, the HSRP priority gets
reduced
> > (even on a subinterface level) until the connection is completely down,
> thus
> > router 2 then invokes the ISDN dials..... ISDN is cheap, so this sounds
> like
> > a good method to me for providing redundance without having to mess with
> > trying to connect 2 routers to a single WAN connection......
> >
> > My 2 cents
> >
> > Mike W.
> >
> > "Jon" wrote in message
> > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> > > I've been reading about designing physical redundancy into networks,
by
> > > having hot standby devices and using HSRP between them. As an
example,
> if
> > > a site has a single router and a single core switch, these are points
of
> > > risk. By adding a second core switch and a second router, any
hardware
> > > failure should be overcome by the standby device taking over. If all
the
> > > servers and wiring closet switches are multi-homed to both core
switches,
> > > users shouldn't notice that a fault has occured. (I assume that the
loss
> > > of a wiring closet switch is acceptable -- perhaps local spares are
> > > sufficient).
> > >
> > > However, if I only have one WAN circuit coming into the facility, it
can
> > > only be connected to one router at a time, right? So, if the active
> > > router fails, how does the WAN connectivity fail over, short of an
> > > operator moving the cable to the second router? I'm not trying to
> address
> > > WAN circuit redundancy or multi-homing, that's a different worm-can to
> > > open.
> > >
> > > Is there some way to have both routers connected to the same WAN
circuit?
> > > Something along the lines of a WYE-cable that connects both routers to
> the
> > > demarc connection? Or is this something that the circuit provider
would
> > > address with their equipement (for a fee, I'm sure)?
> > >
> > > If this has been hashed over in the past, I couldn't find it in the
> > > archives. So, if we've covered this before, could someone share the
key
> > > search words to locate the discussion?
> > >
> > > -jon-
> > >
> > > __________________________________________________
> > > Do You Yahoo!?
> > > Get personalized email addresses from Yahoo! Mail - only $35
> > > a year! http://personal.mail.yahoo.com/
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=6983&t=6646
--------------------------------------------------
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
