RE: Solie lab 16-pg 536--backup interface using ISDN

From: Jake Jake (spage@nc.rr.com)
Date: Tue Nov 19 2002 - 01:54:05 GMT-3


The default dialer idle-timeout period is 120 seconds. So if there is no
traffic for a 120 second period, the call will disconnect.

You can increase/decrease using "dialer idle-timeout xx" under the bri
interface or dialer interface.

However, you should want the call to disconnect when there is no traffic to
avoid accumulating large ISDN bills from the provider.

Jake

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Nancy Courtney (ncourtne)
Sent: Monday, November 18, 2002 11:14 PM
To: ccie
Subject: Solie lab 16-pg 536--backup interface using ISDN

Good Evening,
I am having issues working this lab where item 5 states "both routers
must be capable of initiating ISDN calls" . Solie's solution places the
backup interface cmd on both routers' serial interface. On my lab, this
brings both sides into a standby state and neither will call the other.

When removing the backup interface cmd off one router, backup works well
except the B channels start to disconnect on the called router after the
120 second timeout.

Is Solie incorrect on this config? If not, can someone tell me what I
am doing wrong?

Below is the config where R1 will call R2; however, R2 disconnects the
call after 120 seconds:

R1-Greenbay
interface BRI0
 ip address 170.20.20.1 255.255.255.252
 encapsulation ppp
 dialer map ip 170.20.2.2 name R2-SanDiego broadcast 6785556789
 dialer map ip 170.20.2.2 name R2-SanDiego broadcast 6785559876
 dialer load-threshold 1 either
 dialer-group 1
 isdn switch-type basic-ni
 isdn spid1 67855512341101
 isdn spid2 67855543211102
 ppp authentication pap
 ppp pap sent-username R1-Greenbay password 7 14141B180F0B
 ppp multilink
end
!
interface Serial0
 backup delay 10 120
 backup interface BRI0
 backup load 50 25
 ip address 170.10.251.9 255.255.255.252
 encapsulation frame-relay
 ip ospf network point-to-point
 no fair-queue
 frame-relay interface-dlci 102
end

R2-SanDiego
interface BRI0
 ip address 170.20.20.2 255.255.255.252
 encapsulation ppp
 dialer map ip 170.20.20.1 name R1-Greenbay broadcast 6785551234
 dialer map ip 170.20.20.1 name R1-Greenbay broadcast 6785554321
 dialer load-threshold 1 either
 dialer-group 1
 isdn switch-type basic-ni
 isdn spid1 67855567891101
 isdn spid2 67855598761102
 ppp authentication pap
 ppp pap sent-username R2-SanDiego password 7 14141B180F0B
 ppp multilink
end
!
interface Serial0
 ip address 170.10.251.10 255.255.255.252
 encapsulation frame-relay
 ip ospf network point-to-point
 no fair-queue
 frame-relay interface-dlci 101
end

thanks
Nancy



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