10 Replies Latest reply: Jun 29, 2009 7:05 AM by tnewshott RSS

    GNS3 question....

    Jimmy Sands

      I was doing a frame relay ? for a fellow poster and it works great on the real life routers, but GNS3 is giving me some grief.  I think it is because I can not set the DCE cable type, my configs are at the bottom of this thread

       

      http://forums.cisco.com/eforum/servlet/NetProf;jsessionid=8D1DEB7D914BA2B20D84E2297A2C8771.SJ3A?page=netprof&forum=Network%20Infrastructure&topic=Getting%20Started%20with%20LANs&topicID=.ee7c7c1&fromOutline=&CommCmd=MB%3Fcmd%3Ddisplay_location%26location%3D.2cd3f74c

       

      I do not see any options in Dynaimps to set the DCE/DTE cable type, any feedback?  I am using a FR switch (router) and two other routers, only one serial connection, nothing to crazy.

       

      Thanks

      Jimmy

        • 1. Re: GNS3 question....
          Jimmy Sands

          I should of been more specific, the serial ints are showing up/down.  And since these configs worked fine on real life routers, and since I can not set the DCE cable type anywhere, I am certain its related to the clock rate cmd and DCE/DTE cables.

          • 2. Re: GNS3 question....
            Conwyn

            Hi Jimmy

             

            Just set the clock rate on both ends.

            Remember if your router is acting as a frame-relay switch you need

            frame-relay switching

            and int x

            frame-relay intf-type dce

             

            Check syntax typing from memory

             

            Regards Conwyn

            • 3. Re: GNS3 question....
              Jimmy Sands

              So when you say

              'Just set the clock rate on both ends.'

               

              You saying on the FR switch and on the serial int its connecting too I need to have clock rate 64000 set?

              From R1:

              interface Serial0/1
              ip address 10.13.13.1 255.255.255.0
              encapsulation frame-relay
              frame-relay interface-dlci 131

               

              From FR Switch:

              !
              interface Serial0/0
              description R1
              no ip address
              encapsulation frame-relay
              no fair-queue
              clock rate 64000
              frame-relay intf-type dce
              frame-relay route 131 interface Serial0/1 232
              !

              I need to add the clock rate command also to R1 S0/1 config?  At work now, cant check it out until I get back home.

               

              Thanks

              JImmy

              • 4. Re: GNS3 question....
                Conwyn

                Hi Jimmy

                 

                You need the frame-relay switching  config command on the router acting as the FR switch

                 

                Regards Conwyn

                • 5. Re: GNS3 question....
                  Jimmy Sands

                  I have all that, see this thread (my full configs are posted at the bottom message), I didnt want to tie up the eyes here but posting it.

                   

                  http://forums.cisco.com/eforum/servlet/NetProf;jsessionid=8D1DEB7D914BA2B20D84E2297A2C8771.SJ3A?page=netprof&forum=Network%20Infrastructure&topic=Getting%20Started%20with%20LANs&topicID=.ee7c7c1&fromOutline=&CommCmd=MB%3Fcmd%3Ddisplay_location%26location%3D.2cd3f74c

                  The configs work on real life routers, but trying to port them over to GNS3, to fiddle around with different scenarios is what I want to do.  When I did that, the ints on R1 and R2 showed as up/down, hence my clocking question.

                   

                  Thanks

                  Jimmy

                   

                  Message was edited by: Jimmy Sands

                  • 6. Re: GNS3 question....
                    tnewshott

                    What are you trying to experiment with?   With GNS3 I typically use the built-in frame-relay switch that has a graphical config and you merely setup the DLCIs to pair with the respected interfaces.  Then you set encap frame-relay on the interface and set the speed and you're good to go!

                     

                    Or, are you trying to experiment with features on the router acting as a frame-relay switch?

                    • 7. Re: GNS3 question....
                      Armen

                      Hi Jimmy,

                       

                      I think your problem is:

                      frame-relay route 131 int s0/2 (or what ever your other router is connected to frame relay switch)232

                       

                      Let us know

                      • 8. Re: GNS3 question....
                        Jimmy Sands

                        I think Travis was right.....in Cisco NetAcad program they taught us to use a router as a FR switch...but in the real world I guess they do have FR switches and not routers pretending to be such.  Problem is that in school they didnt teach us any diff configs for connecting to a FR Switch, only router.

                        So right now I have RTR1-----FR SW----RTR2

                         

                        R1:
                        interface Serial0/1
                        ip address 10.13.13.1 255.255.255.0
                        encapsulation frame-relay
                        serial restart-delay 0
                        clock rate 64000
                        frame-relay interface-dlci 131
                        end

                         

                        R2:
                        interface Serial0/1
                        ip address 10.13.13.2 255.255.255.0
                        encapsulation frame-relay
                        serial restart-delay 0
                        clock rate 64000
                        frame-relay interface-dlci 232
                        end

                         


                        On FR Switch:

                         

                        Port 1
                        DLCI 131

                         

                        Port 10
                        DLCI 232

                         

                        The ints are showing up/down, anything that I am missing (again, I was only used to using FR w/routers acting as FR switch)?

                         

                        Thanks all that responded,

                        Jimmy

                         

                        Here is my debug, which shows the DTE down, but that side of the cable is connected to the FR Switch, and on GNS its being shown as an green uplink.

                         

                        *Mar  1 01:01:05.623: Serial0/1(out): StEnq, myseq 3, yourseen 0, DTE down
                        *Mar  1 01:01:05.627: datagramstart = 0x7B91894, datagramsize = 13
                        *Mar  1 01:01:05.627: FR encap = 0xFCF10309
                        *Mar  1 01:01:05.627: 00 75 01 01 00 03 02 03 00
                        *Mar  1 01:01:05.635:

                         

                        Message was edited by: Jimmy Sands

                        • 9. Re: GNS3 question....
                          Jimmy Sands

                          Issue fixed, had it connected to the wrong ports, and because GNS3 showed the (graphical) indicators as green, I was led down the wrong path, but back to basics.  Once I had noticed wrong connections and fixed it, its working now w/the FR Switch, thanks everyone for your feedback.

                           

                          Cheers

                          Jimmy

                          • 10. Re: GNS3 question....
                            tnewshott

                            Glad you got the issue fixed!