From: huang gang (bgv@ggv.com.cn)
Date: Wed May 14 2003 - 22:46:48 GMT-3
hi,Umair:
i think you have mistaked the "dialer-list" command.dialer-list is only defines the "intersting traffic",not permit or deny some packet going out the interface!
the "intersing traffic"has two functions:1),triggle the dialer 2),reset the idle-time out.
With dialer watch, interesting traffic is only used to control the idle-timeout which in turn controls the interval used to poll the status of the primary route.
email: bgv@ggv.com.cn
Tel: (86)010-62984668-3912
----- Original Message -----
From: "Jung, Jin" <jin.jung@lmco.com>
To: "'OhioHondo'" <ohiohondo@columbus.rr.com>; "Umair Hoodbhoy" <umair@cisco.com>; <ccielab@groupstudy.com>
Sent: Wednesday, May 14, 2003 9:17 PM
Subject: RE: What use are ospf demand circuits when you have dialer-watch?
> You need to use demand-circuit, if you need to back up all ospf network,
> Dialer-watch can only back-up the route that u have on your route table.
>
> Let's say you have route in area 5 6 hops away,
> With demand -circuit, if this ospf network goes down, it will generate LAS
> and isdn link will be synced to FULL,
>
> With dialer watch, nothing will happen, since primary route never went down.
>
> Ospf demand circuit is part of OSPF,
> Dialer watch will only watch the route that you setup.
>
> Jin jung...
>
> -----Original Message-----
> From: OhioHondo [mailto:ohiohondo@columbus.rr.com]
> Sent: Sunday, May 11, 2003 2:32 AM
> To: Umair Hoodbhoy; ccielab@groupstudy.com
> Subject: RE: What use are ospf demand circuits when you have dialer-watch?
>
>
> I believe OSPF demand circuits, because they cause the LSA's learned by the
> ISDN circuit to be saved, have a quicker convergence -- therefor data
> traffice is less disrupted when the primary fails.
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of Umair
> Hoodbhoy
> Sent: Saturday, May 10, 2003 11:00 PM
> To: ccielab@groupstudy.com
> Subject: What use are ospf demand circuits when you have dialer-watch?
>
>
> Hi folks,
>
> If you're using dialer-watch in an OSPF environment, and have the following
> lines for interesting traffic:
>
> access-list 101 deny ospf any any
> access-list 101 permit ip any any
> dialer-list 1 protocol ip list 101
>
> then why would you want to configure OSPF Demand Circuits? Shouldn't the
> first statement of access-list 101 do the same thing i.e. deny OSPF Hellos
> and LSAs from bringing up the link?
>
> Thanks.
>
> -- Umair
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