Probably layer 1 and 2 are deactivated by the Telco. It's better to use a dialer interface as backup of a serial line. Then L1/2 stays up. Refer to other ISDN thread as well.
If you don't want to do that, try to change the TEI negotiation. Cisco's default is TEI negotiation when the router is powered up. TEI negotiation also happens when you reset your interface. So try to configure TEI negotiation on first call for your backup interface only: interface bri0 isdn tei first-call When the serial goes down, the backup makes its first calls and trigger TEI negotiation. I hope ... Let me know, Eric Brouwers ----- Original Message ----- From: "George Murage" To: Sent: Tuesday, July 08, 2003 6:52 PM Subject: RE: ISDN Port goes to Deactivated mode [7:72022] > I have experienced the same problem and would really like to see what the > others have to say. > > > While testing, I put my router with a BRI-1B-S/T card behind a PBX with an > NTI card and the problem vanished. > > This led me to believe that the problem has something to do with the telco. > > I *think* the telco switch may not be able to detect, in a timely fashion > that your isdn line is active, because European ISDN switches normally > deactivate layer 1 or layer 2 of an idle isdn line. > > Removing and re-inserting the cable sort of resets the layers 1 and 2. Has > the same effect as typing "clear int brix/y" on the router. > > Regards > George Murage > > -----Original Message----- > From: H T [mailto:[EMAIL PROTECTED] > Sent: Tuesday, July 08, 2003 5:49 PM > To: [EMAIL PROTECTED] > Subject: Re: ISDN Port goes to Deactivated mode [7:72022] > > Hi, > can you show us your running config of both sides, so we can know where > would be the problem? > > > cheers, > Heiman. > > > > ""Mr piyush shah"" wrote in message > news:[EMAIL PROTECTED] > > Dear all > > I am having 128 kbps Leased Line with ISDN backup.As > > the Link goes Down ,ISDN should trigger,however in my > > case the ISDN link does not come up and goes to > > deactivated mode.What could be the problem .I have > > seen that upon removing the ISDN link and inserting > > back it gives the status as ACTIVE.What could be the > > problm? > > Kindly help as I am not able to use backup link due to > > this reason. > > > > I have attached herewitht the log of sh isdn status > > command for your kind pwerusal > > > > Thanks in advance. > > > > Regards > > > > > > Piyush > > > > router-1#sh ISDN status > > > > ISDN BRI0 interface > > dsl 0, interface ISDN Switchtype = basic-net3 > > Layer 1 Status: > > DEACTIVATED > > Layer 2 Status: > > TEI = 85, Ces = 1, SAPI = 0, State = > > TEI_ASSIGNED > > I_Queue_Len 0, UI_Queue_Len 0 > > Layer 3 Status: > > 0 Active Layer 3 Call(s) > > Activated dsl 0 CCBs = 0 > > The Free Channel Mask: 0x80000003 > > Total Allocated ISDN CCBs = 0 > > > > ________________________________________________________________________ > > Send free SMS using the Yahoo! Messenger. Go to > > http://in.mobile.yahoo.com/new/pc/ Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=72042&t=72022 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
