At 01:18 PM 5/9/02, mark wrote: >I originally configured and maintain several Cisco routers at work so I'm >not a TOTAL dumbass when it comes to routers but I sure do feel like one >about now. >I have a couple of 2500's and a 2600 router with a couple of back to back >cables. I'm not doing something correctly to allow the units to talk to each >other using those cables. I can telnet into each router or connect via >console connection and all are working.
Presumably you mean that you can Telnet to each router from a local PC?? (In other words, you can't Telnet from router to router, I would guess.) Anyway, you should start with the PHY and data-link layers first. What does show controllers say? What does show serial interface say? Is the interface up/up? Show controller (at least on some routers) will let you see which interface the DCE cable is connected to, which is nice if the cable isn't labeled. On that interface you must have the clockrate command configured. You can use any rate. Might as well go for a fast one. Note you have to set clockrate for any encap, HDLC, FR, whatever. It gets the lowest sublayer of the data-link working, or maybe the highest sublayer of the PHY depending on how you look at it. You should get HDLC or PPP working first. Back-to-back FR is a little harder, requires one to be a FR switch. We can give you more info on that once you get there.... If you still have troubles, send us your config. Thanks. Priscilla >The green lights come on the serial >connections when the b to b cables are plugged in but I can't for the life >of me get them to talk to each other. Can't ping from one serial port on >subnet A thru the b-to-b cable to the serial port on the other router on the >same subnet on any of the routers. I have checked and rechecked ip info on >all. I have tried frame-relay and PPP (which I would NOT trust my >configuraion of but I do know frame OK - or at least I thought I did). I >have RIP and EIGRP enabled on all and have them redistributing. I have tried >the DCE and the DTE at each end. This is what maybe the particularly dumbass >question - Do I need to set a clock rate or data rate for a frame connection >using these cables? If so the commands required would be helpful. I can look >at the options available. I just need to know where to start with them. If >it's not a clock rate issue, have I given enough info for anyone to give me >an educated guess as to what I'm doing wrong? If not, what other info can I >provide? >Muchas gracias. > >Mark "Gump" ________________________ Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=43765&t=43765 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
