If you can use the other serial port just fine, my guess would be that you have a bad port. If it were just the single port, I'd say lower the clock rate as your cable may be bad (try 128000 or 64000).
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE #153, CISSP, et al. CCSI/JNCI-M/JNCI-J IPexpert VP - Curriculum Development IPexpert Sr. Technical Instructor [EMAIL PROTECTED] http://www.ipexpert.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tony Hidalgo Sent: Monday, February 05, 2007 5:47 PM To: [email protected] Subject: [OSL | CCIE_RS] PPP over Serial Back-to-Back Hello people from the list. I am having and issue connection two 2620's back-to-back over a serial pipe (DCE-DTE) using either PPP or HDLC as the encapsulation protocol. When I connect the two routers using S0/0 on router "A" and S0/1 on router "B" the connection comes up with either L2 encap. protocols. I can see each other through CDP, etc. In this config, I get interface UP and Line Protocol UP. When I connect the two routers using the same interface type/number on both sides (IE S0/1 on router "A" and S0/1 on router "B"), the connection does not come up 100%. I see the interface UP but the line protocol is DOWN on both sides. Of course, I am setting the clock rate on the DCE side, and when I turn on debugging for PPP events, I see the following: LCP: Timeout: State ACKsent LCP: State is Listen Both routers are 2620's and running IOS 12.3. This is the config on the interfaces in question: interface Serial0/1 no ip address encapsulation ppp no peer neighbor-route (I can have this command on or off without difference) In the Lab that I am currently working on, this is the physical connection to be used and also I have seen this same setup on other documents without any reference to a problem with using the same interface type/number on both sides. If I change the interface on either side (EI S0/0 - S0/1), the pipe comes up fully. Does anybody have a clue about this? Thanks in advanced! ____________________________________________________________________________ ________ Don't pick lemons. See all the new 2007 cars at Yahoo! Autos. http://autos.yahoo.com/new_cars.html
