Hello all, we must install Cisco Router in our IBM environment :)) . We solved a = lot of problems but we have one unsolved problem: The Cisco router must dialed-in to the IBM router with both ISDN B channels. The connection comes not up with the feature multilink. We te= sted a lot of possibilties: - dial-in Cisco <-> Cisco with and without Multilink is o.k. - dial-in IBM <-> IBM with and without Multilink is o.k. - dial-in Cisco <-> IBM without Multilink (one ISDN B channel) is also = o.k. Only the multilink solution between Cisco an IBM doesn=B4t work. Have any of you an idea ?? We think that we have a problem with the LCP layer. For instance how ca= n I set the MRRU ? Software: c2500-is-l_120-8.bin and eptf09i.e11 See the files (configuration of the Cisco router and a debug of the IBM= ), please. (See attached file: Multilink.log)(See attached file: cisco2504.log) Thank=B4s a lot. Thomas Wacker (CCNA) OE33 Betriebsplanung/Projekte nbg Netzbetriebsgesellschaft mbH Au=DFenstelle Leipzig E-Mail: [EMAIL PROTECTED]= _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]