From: Robert Yee (robert@bluespud.com)
Date: Wed May 14 2003 - 14:53:25 GMT-3
I don't think you need the second dialer-map statement. If you are using PPP multilink, it will dial the second call on the same number as the first. It is up to the receiving end to pick up on the second channel.
If you do a 'show dialer', you should see both channels engaged.
Also, just as a side note, I always set my OSPF cost on ISDN to 9999. Setting to 10 could cause your link to flap because you are giving it the same cost as ethernet.
Robert
-----Original Message-----
From: Osterberg, Todd (EM, ITS) [mailto:Todd.Osterberg@ge.com]
Sent: Wednesday, May 14, 2003 7:52 AM
To: ccielab@groupstudy.com
Subject: ISDN / ospf demand interface question (long)
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>
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