From: Nancy Courtney \(ncourtne\) (ncourtne@cisco.com)
Date: Tue Nov 19 2002 - 10:56:03 GMT-3
Hi Donny,
Yes, I setup all IP traffic to be interesting. After more work, I found
that you can enable backup interface on both routers if you use frame
relay subinterfaces. I did not set an idle timeout on the bri
interfaces, because the backup delay cmd on the serial interfaces states
to kick the bri line up after 10 sec and disconnect after 120 seconds if
there is no traffic. OSPF Hellos should keep the bri link open....yes?
thanks Nancy
-----Original Message-----
From: Donny MATEO [mailto:donny.mateo@sg.ca-indosuez.com]
Sent: Tuesday, November 19, 2002 1:03 AM
To: Nancy Courtney (ncourtne)
Cc: ccie; nobody@groupstudy.com
Subject: Re: Solie lab 16-pg 536--backup interface using ISDN
the problem with 2 backup interface is when say rtr1 serial interface
is down, rtr1 will enable the BRI and call the rtr2. A problem will
occured if on router 2, the serial interface is indicated as up (as is
the norm with frame-relay). Router 2 will force the BRI to be on standby
state then it would not be able to be used to accept the call from rtr1.
for the disconecting after 120sec, did you specify OSPF as interesting
traffic under your access-list for the dialer-list on both routers ?
Donny
"Nancy Courtney
\(ncourtne\)" To: "ccie"
<ccielab@groupstudy.com>
<ncourtne@cisco.c cc:
om> Subject: Solie lab 16-pg
536--backup interface using ISDN
Sent by:
nobody@groupstudy
.com
19-11-2002 12:13
Please respond to
"Nancy Courtney
\(ncourtne\)"
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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