From: Azhar Mehmood (azhar.mehmood@web.de)
Date: Wed Oct 16 2002 - 14:32:17 GMT-3
hi,
the config is as you described bellow, despite having e0 as primary, serial as secondry and ISDN as last option dialer-watch triggers ISDN call right after e0 is anavailable. Although ISDN link is down again after idle-timeout has expired because serial interface is prefered as second option and also routes are installed in routing table. My question was how to prevent dialer-watch to trigger ISDN call right after E0 is down and serial is available as second option. By the way I'm using EIGRP and Serial is a permanent link with HDLC enc.
regards
AZHAR M.
Germany
"Bola Adegbonmire" <BolaAD@Resourcery.com.ng> schrieb am 16.10.02 13:38:22:
> Hi,
> I did something like this a recently and used Dialer watch. Though my DDR link is over an asychromous modem via PSTN. First I will like to know if your Serial interface is a permanent connection. for example is it a frame-relay PVC? If you had something like this
>
> Ethernet
> Serial - frame-relay PVC
> ISDN
>
> 1 make sure that the network been watched "xxxx" by dailer watch is also sent by your dynamic routing protocol (Eigrp/Igrp/OSPF) over the serial link.
>
> 2 make sure your Serial interface is made less desirable than your ethernet(default interface bandwidth makes sure though), use bandwidth command
>
> 3 make sure ISDN interface is least desirable of all three (use bandwidth command here too)
>
> Scenario is close to this
>
> int e0
> bandwidth 10000
> !
> int s0
> bandwidth 256
> !
> int bri0
> bandwidth 64
>
> and you were running your dynamic protocol on all interfaces, you will have network xxxx in topology table(EIGRP) but route through e0 installed in routing table. When e0 no longer receives hello packets, route through serial is installed and finally if PVC goes down then there is no interface in routing table referencing xxxx dialer watch noiw kicks the ISDN link to dial.
>
>
> -----Original Message-----
> From: Ashok.Gupta [mailto:Ashok.Gupta@gmconsultants.com]
> Sent: Tuesday, October 15, 2002 7:44 PM
> To: 'Azhar Mehmood'; ccielab@groupstudy.com
> Subject: RE: Dialer watch
>
>
> floating static
>
> Regds
>
> Ashok
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> Azhar Mehmood
> Sent: 15 October 2002 17:09
> To: ccielab@groupstudy.com
> Subject: Dialer watch
>
>
> Hi,
>
> I have a router R1 ehich has 3 exit points to reach a specific subnet:
>
> 1. Ethernet
> 2. Serial
> 3. ISDN
>
> As long the route over ethernet is available it's prefered over all other,
> after it has gone serial is prefered and as third option the ISDN Link.
>
> Now my problem is how to keep ISDN Link down until both of the primary links
> are available. I tried to acomplish it with dialer watch but as soon as the
> ethernet is gone dialer watch triggers the call hence it brings it also down
> again after idle-timeout.
>
> My question is how to configure the router that it waits until both of the
> link 're unavailable and triggering than an isdn call.
>
>
> regards
>
> AZHAR MEHMOOD
> GERMANY
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