ISDN / ospf demand interface question (long)

From: Osterberg, Todd (EM, ITS) (Todd.Osterberg@ge.com)
Date: Wed May 14 2003 - 11:51:39 GMT-3

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Listers-

I am playing with ospf demand circuits over isdn and I am having mixed
results at best. I am just not seeing why this config (below) is not
working. The router will connect over a single B channel but the second
B channel is never activated and the connection stays up. From the
debug of R1, it appears that R1 doesn't try to make a call on using the
first dialer map to the first B channel of R2. I have played with the
dialer load-threshold values but the behavior doesn't change. Any ideas
would be appreciated.

R1 debug (captured when the first channel is up and a load is placed on
the link)

08:55:13: BR0/0 DDR: Attempting to dial 8358662
08:55:43: BRI0/0: wait for isdn carrier timeout, call id=0x801B
08:55:43: BR0/0 DDR: Already 1 call(s) in progress on BR0/0, dialing not
allowed

r1 config

username r2 password cisco

interface BRI0/0
 bandwidth 128000
 ip address 150.50.12.1 255.255.255.0
 encapsulation ppp
 ip ospf cost 10
 ip ospf demand-circuit
 dialer map ip 150.50.12.2 name r2 broadcast 8358662
 dialer map ip 150.50.12.2 name r2 broadcast 8358664
 dialer load-threshold 1 either
 dialer-group 1
 isdn switch-type basic-ni
 isdn spid1 0835866101 8358661
 isdn spid2 0835866301 8358663
 no peer neighbor-route
 ppp authentication chap
 ppp multilink

dialer-list 1 protocol ip permit

r2 config

username r1 password cisco

interface BRI0/0
 bandwidth 128000
 ip address 150.50.12.2 255.255.255.0
 encapsulation ppp
 ip ospf cost 10
 dialer map ip 150.50.12.1 name r1 broadcast 8358661
 dialer map ip 150.50.12.1 name r1 broadcast 8358663
 dialer load-threshold 1 either
 dialer-group 1
 isdn switch-type basic-ni
 isdn spid1 0835866201 8358662
 isdn spid2 0835866401 8358664
 no peer neighbor-route
 ppp authentication chap
 ppp multilink
!
dialer-list 1 protocol ip permit

Todd Allen Osterberg
GE IT Solutions
Western Region Presales Engineer
M: 916-316-4650
F: 309-406-1489
D: 916-631-6748
todd.osterberg@ge.com <mailto:309-406-1489todd.osterberg@ge.com>

• Next message: Joe Martin: "RE: ISDN doesn't stay up more than a second"
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• Maybe reply: Robert Yee: "RE: ISDN / ospf demand interface question (long)"
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