From: Todd Veillette (tveillette@myeastern.com)
Date: Sat May 17 2003 - 13:03:47 GMT-3
We have the exact same scanrio, in production, and
have tried every backup technology there is at one time
or another. We run ospf to 2 main hubs, with a spoke
to each at the branches, all branches are 8-5 M-F and
some Saturday.
After many iterations of different back-up configs our
conclusion resulted in floating static with time-range acl's.
We block redistribution of the ISDN networks with the serial's
up and the Serial interfaces with the ISDN's up.
Both serial interfaces go down, the floating static kicks in and
the networks are re-established over the ISDN network, with
OSPF re-learning the routes. We tie the time range into the
dialer-list acl.
Hope this helps.
-TV
----- Original Message -----
From: <jfaure@sztele.com>
To: <ccielab@groupstudy.com>
Sent: Saturday, May 17, 2003 9:28 AM
Subject: Dialer watch "time-range" based
> Hi all:
>
>
> We are wondering if it is posible to configure a dial backup mechanism
that
> allow these conditions:
>
> 1-The backup link only must go up in working hours AND
> 2-The backup link only must go up if the branch office has lost frame
relay
> communication with the central office.
>
> The problem is we have redundant pvc's in branch offices to access the
> central site, and we prefer frame relay access than ISDN access if
> possible. This is, you only must call by ISDN if the two pvcs are down and
> the branch office has no way to go to the central site. Besides, i though
> backup interface doesn't help especially because the fr pvcs of the
central
> can go down but not the pvcs in the branche office, and we only want that
> branches offices launch the call. And also, we only want that the link go
> up in working days to save innecesary costs.
>
> Then, i was thought that we could combine dialer watch and an access list
> extended that uses a time range to specify when do you must call exactly.
> But i'm seeing that the dialer watch seems not allow to specify an ACL to
> control this. Any one knows any way to do so? May be a problem with my IOS
> release? I'm using 12.1.14 in all my routers.We are using OSPF to
> communicate our sites.
>
> Maybe a possible work-around, that we don't want to consider at first,
> because it suppose very hard system administrative task: configure dial
> backup based on floating static routes and obviously have these statics
> routes in all routers.
>
> Regards and thank you very much for your help.
>
>
>
> Juan Faure Ferrer
> email: jfaure@sztele.com
>
> Lmnea de Negocio de Telematica y CC
> Ingeniero de Integracisn de Redes y Sistemas
> --------------------------------------------------------------------------
-- > > SOLUZIONA TELECOMUNICACIONES > Servicios Profesionales de UNION FENOSA > Jerez, 3 > 28016 MADRID > tel 91 579 30 00 fax 91 350 72 83 > -------------------------------------------------------------------------- -
This archive was generated by hypermail 2.1.4 : Mon Jun 02 2003 - 15:13:44 GMT-3