RE: ISDN Backup With Dialer Watch

From: Geralt Omhof (geralt@OmnIT.nl)
Date: Thu Jan 02 2003 - 13:51:51 GMT-3


Hi,
 
the idletimeout is being reset at the first router when there is no route to 192.168.5.1. This works fine. But the other routers idletimeout isn't being reset unless there is traffic flowing through the isdn line. So it drops the line after it's idletimeout expires.
You can check this by changing the idletimeout on the first router to 20 seconds and the second to 30:
 
When the route disappears on the first router it dials the other one.
The second router picks up the phone and listens for traffic.
The first router waits until its idle timeout elapses and resets it because the route is still not reachable via the primary interface
The second router watches for traffic but when there isn't any it drops the line after 30 seconds.
 
So you can do two things:
make sure there is traffic
or
make sure the idletimeout on the second router is very high
 
 
Regards,
 
Geralt

        -----Original Message-----
        From: Evgeny Tantsura [mailto:ivgen@castel.nl]
        Sent: Thu 1/2/2003 4:03 PM
        To: ccielab@groupstudy.com
        Cc:
        Subject: ISDN Backup With Dialer Watch
        
        

        Hi,
        
        My ISDN interface with Dialer Watch on it
        is going down every idle-timeout and then dialing again.
        
        interface Dialer1
         ip address 1.1.1.2 255.255.255.0
         encapsulation ppp
         ip ospf demand-circuit
         dialer pool 1
         dialer idle-timeout 180
         dialer string 0496406937
         dialer load-threshold 127 either
         dialer watch-group 1
         dialer-group 1
         pulse-time 0
         no cdp enable
         ppp authentication chap
         ppp multilink
        end
        
        access-list 170 deny ospf any any
        access-list 170 permit ip any any
        dialer watch-list 1 ip 192.168.5.1 255.255.255.255
        dialer-list 1 protocol ip list 170
        ----------------------------------------------------
        
        interface Dialer1
         ip address 1.1.1.1 255.255.255.0
         encapsulation ppp
         dialer pool 1
         dialer idle-timeout 180
         dialer load-threshold 50 either
         dialer-group 1
         no cdp enable
         ppp authentication chap
        
        dialer-list 1 protocol ip permit
        
        
        According to CCO it should stay connected until the router gets the
        route via primery interface.
        
        Any idea's ?
        
        With kind regards/ met vriendelijke groeten,
        ------------------------------------------------
        E. Tantsura
        Network Developer
        Essent Kabelcom N.V.
        Dr.van Deenweg 84
        8025BN Zwolle, The Netherlands
        Tel: +31-(0)38-850-7642
        Fax: +31-(0)38-850-7410
        Mob: +31-(0)6-290-80458
        ------------------------------------------------
        .
.



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