From: Scott Morris (swm@emanon.com)
Date: Fri May 20 2005 - 09:58:49 GMT-3
It depends on what the other side configuration is.... But I'd be willing
to bet you are ending up with two UNIdirectional links. Do a 'debug isdn
q931' and 'debug ip packet' on the other side. You will likely see the
first line go up, the first packet come in, and as it tries to send out the
reply packet it will place another phone call (not realizing it's already
connected).
This has nothing to do with the isdn switch-type per se. It has to do with
incoming call information (show dialer as an example) and whether the router
believes it's already connected or it has to dial out to send the reply (per
the dialer map). It's simply a L3 to L2 mapping correlation issue.
HTH,
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
SIMON HART
Sent: Friday, May 20, 2005 6:38 AM
To: ccielab@groupstudy.com
Subject: ISDN Basic-Net 3
This may seem like a fairly trivial question, but I have not seen this
before, any help?
I have configured a Legacy DDR using Basic Net-3 on an ISDN BRI0
int bri0
isdn switch-type basic-net3
ip address 172.1.1.2 255.255.255.0
dialer map ip 172.1.1.1 name Rack1R3 720451 dialer-group 1
dialer-list 1 permit protocol ip
Whenever I initiate a call from this interface both ISDN B channels come up.
There are no dialer load threshold statements etc. I can see both lines
coming up on the local and remote routers. I have connectivity with both
ends (so I am not dialing back on myself).
Why is this the case? How do I stop it? I am sure that this is not normal
behaviour
Thanks
Simon
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