RE: Other ways of solving it --- frame-relay backup

From: Gustavo Novais (gustavo.novais@novabase.pt)
Date: Tue Dec 27 2005 - 11:53:38 GMT-3

Yes,

I think that both of them (increasing cost and demand-circuit) must be used.
Increase cost because we do not wish the circuit to be used, and Demand
Circuit to suppress hellos, and then effectively we do NOT use the ppp link.

I think that either of those used by its own would not guarantee that you
would not use the ppp link (unless FR goes down on R4)

Gustavo Novais

________________________________

From: Chula Bandara [mailto:chula_bandara@hotmail.com]
Sent: terga-feira, 27 de Dezembro de 2005 14:48
To: Gustavo Novais
Subject: RE: Other ways of solving it --- frame-relay backup

I think , you can also do a ip ospf demand-circuit over a point-to-point
circuit.

________________________________

        From: "Gustavo Novais" <gustavo.novais@novabase.pt>
        Reply-To: "Gustavo Novais" <gustavo.novais@novabase.pt>
        To: "Cisco certification " <ccielab@groupstudy.com>
        Subject: Other ways of solving it --- frame-relay backup
        Date: Tue, 27 Dec 2005 14:27:18 -0000
        Hello group,

        I have a task where I'm asked to do a backup of a frame-relay circuit
        using OSPF. The backup line is a dedicated serial line encapsulated with
        ppp. The wording is as follow:

        Configure area 0 on the ppp link between R4 and R5

        The ppp link will be a backup of of frame-relay connection between R4
        and R5 (both using major interfaces, R5 hub, R4 spoke). Configure the
        network in such a way that this link is only used if R4 (a spoke) loses
        its connection to the frame-relay cloud.

        My obvious solution to this is just to increase the ospf cost of the
        interfaces involved on the ppp link, in order that it does not show up
        as the preferred path between R4 and R5.

        My doubt is that perhaps this solution may be too obvious, and perhaps I
        am missing something...

        Any suggestions or alternative ways of doing this? Am I just being
        paranoid about complexity?

        Thank you

        Gustavo Novais

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