From: MADMAN (dave@interprise.com)
Date: Thu Feb 06 2003 - 18:00:22 GMT-3
Another nice feature of dialer watch is that it will initiate the
call without requiring an interesting packet which was a requirement I
recently ran into.
Dave
Joe Chang wrote:
> Sam, the methods you listed serve different purposes.
>
> OSPF demand-circuit and ODR allow protocol neighbors to maintain relations
> without hello PDUs, allowing ISDN links to time out and disconnect.
>
> Dialer watch and floating statics trigger calls when specific routes
> disappear. Dialer watch can keep the ISDN link from timing out while the
> routes are still missing, so it is more appealing than a floating static.
>>From my personal experience and from recent discussions dialer watch behaves
> differently than the first assumptions of many people:
>
> http://www.cisco.com/warp/public/129/bri-backup-map-watch.html
>
> ----- Original Message -----
> From: "MADMAN" <dave@interprise.com>
> To: "sam" <sam@avtechusa.com>
> Cc: <ccielab@groupstudy.com>
> Sent: Thursday, February 06, 2003 3:48 PM
> Subject: Re: ISDN: Back up interface - Which do you prefer?
>
>
>
>> Yes floating static route. Of coarse this is not suitable for all
>>situations but for the majority it works perfectly well and is simple.
>>
>> Dave
>>
>>sam wrote:
>>
>>>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)
>>>.
>>
>>--
>>David Madland
>>CCIE# 2016
>>Sr. Network Engineer
>>Qwest Communications
>>612-664-3367
>>
>>"You don't make the poor richer by making the rich poorer." --Winston
>>Churchill
>>.
-- David Madland CCIE# 2016 Sr. Network Engineer Qwest Communications 612-664-3367"You don't make the poor richer by making the rich poorer." --Winston Churchill .
This archive was generated by hypermail 2.1.4 : Sat Mar 01 2003 - 11:06:13 GMT-3