RE: Back up interface - Which do you prefer?

From: sam (sam@avtechusa.com)
Date: Thu Feb 06 2003 - 19:23:16 GMT-3

Thanks for the posts. I've been trying to understand under what
circumstances one particular backup could be used over another.

For example

Dialer Profiles are great when you want to use your dialer interface as
a backup for multiple interfaces to multiple corresponding locations.

Watch Groups on the other hand provide greater flexibility as they
monitor routes and not any particular interface, making them more
flexible to changes in your routing topology.

Thanks for your opinions

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
cannonr
Sent: Thursday, February 06, 2003 4:06 PM
To: sam; ccielab@groupstudy.com
Subject: Re: Back up interface - Which do you prefer?

Dialer Watch is the best method in my opinion. It is routing protocol
independant because it watches the actual routing table. There is much
less
admin work than DDR. It is also faster than DDR because with DDR, you
may
be waiting for an INARP entry to dissapear if a subinterface dies.

Royce
----- Original Message -----
From: "sam" <sam@avtechusa.com>
To: <ccielab@groupstudy.com>
Sent: Thursday, February 06, 2003 1:02 PM
Subject: ISDN: Back up interface - Which do you prefer?

> Hey all, I appreciate your time taken to read this.
>
> It is my understanding that there are several methods that can be used
> to configure an On-Demand ISDN line as a backup.
> In particular,
>
>
> - OSPF demand-circuit to suppress OSPF hello-packets
> - EIGRP on-demand-routing (ODR) using CDP to halt EIGRP
routing
> updates keeping link alive
> - Dialer Watch Group used to monitor specific routes instead
of
> an interface
>
> I can understand different methods deployed if you use different
routing
> protocols, but are there any advantages to any method, or a preferred
> style that you might use? Any other methods you find desirable?
>
> TIA!
>
> Sam Sena
> Avtech Technologies
> 4500 New Brunswick Ave
> Piscataway NJ
> (732) 424-8008 (o)
> (732) 424-7388 (f)
> .
.
.

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