This was once an issue some time ago... Should not be anymore...We use 837's without Layer 2 permanently on. Hmm, yep, I would try another IOS,we use 12.2.13ZH2, although this one has an issue with NAT of PPTP sessions, but who's using PPTP ;-) I also tested 12.3(8)T4 which also gives no problem...
If you should still have a problem after that, you still can ask Swisscom to keep layer 2 up.
Christian
-----Original Message----- From: swinog-bounces@lists.swinog.ch [mailto:swinog-bounces@lists.swinog.ch]On Behalf Of Lukas Krattiger (NOC) Sent: Donnerstag, 3. März 2005 23:32 To: swinog@swinog.ch Subject: RE: [swinog] ISDN Layer 2 Problem
Hi Beat
I agree to Roger. There is a power-save mode which affects the ISDN-Layer2. At least the BRI's from the old cisco2500 needed this feature, otherwise I saw the same behaviour. Go and ask Swisscom, they should activate the Layer2.
Cheers -Lukas
-----Original Message----- From: swinog-bounces@lists.swinog.ch [mailto:swinog-bounces@lists.swinog.ch] On Behalf Of Roger Buchwalder Sent: Donnerstag, 3. März 2005 23:12 To: swinog@swinog.ch Subject: Re: [swinog] ISDN Layer 2 Problem
Hello Beat
I remember, we had also some problems with ZyXEL-ISDN-Routers. We call then to the Swisscom, they may put the Layer 2 always to "on"-state. Maybe it helps?
rog
Beat Rubischon schrieb:
Hello!
Am 03.03.05 schrieb Beat Rubischon:
I'm trying to configure a ISDN backup link on a Cisco.
First, thanks a lot for your ideas. I have now debugged a lot and my results are the following:
It's not a problem in the wiring or termination.
Dial-Out is possible when Layer 2 is in state "MULTIPLE_FRAME_ESTABLISHED" (aka an running call) or "NOT Activated" (not initialized yet)
Dial-Out is not possible when Layer 2 is in state "TEI_ASSIGNED", debugging shows that the communication simple times out.
I assume now a bug in the IOS - 12.3(8)YA [1] is an early deployment release. I hope to get my service contract soon to access other images.
[1] http://www.cisco.com/en/US/products/sw/iosswrel/ps5413/prod_bulletin09 00aecd80157bb5.html
A disconnect of the S-Bus resets the Layer 2 and with the setting "isdn tei-negotiation first-call" no new TEI is allocated. So I will try to switch off Layer 1 - each time Swisscom shuts down Layer 1, my BRI would be resetted :-)
May be someone has another idea. I have put the config and a logfile on [2].
Beat
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Kuster, Christian