Sam, Yes that back-to-back config works, yet you will not gain the knowledge and skills that I think you are after.
It's true, you do need a third router to be the frame cloud, but that doesn't buy you much either. The key is to make the frame switch, also a DTE Hub router. However, you must have at least 4 interfaces (like a 2520). This will allow you to connect a DCE/DTE cable between two of the ports, thus allowing the 2520 to also be a hub router. As you grow your lab, and add two more routers, the 2520 can still serve a frame switch for 4 routers, it just can't be a hub router anymore. Here is the config that makes this work - remember ports 2 and 3 are connected with a back-to-back cable. ------- 2120 Hub router with 4 interfaces, interfaces S2 and S3 are looped via a DCE/DTE cable, R2 is connected to S0, R3 is connected to S1. This config allows R1 (the 2520) to not only become a frame switch for R2, and R3, but it allows R1 to be a DTE device (or hub router). R1 Config: frame-relay switching interface Serial0 description -- Serial Connection to R2 clockrate 64000 bandwidth 64 no ip address encapsulation frame-relay frame-relay intf-type dce frame-relay route 100 interface Serial 2 150 interface Serial1 description -- Serial Connection to R3 clockrate 64000 bandwidth 64 no ip address encapsulation frame-relay frame-relay intf-type dce frame-relay route 200 interface Serial 2 250 interface Serial2 description -- To Terminating FR DTE sub-if -- S3.x clockrate 64000 bandwidth 64 no ip address encapsulation frame-relay frame-relay intf-type dce frame-relay route 150 interface Serial0 100 frame-relay route 250 interface Serial1 200 interface Serial3 description -- Terminated FR DTE sub-if bandwidth 64 no ip address encapsulation frame-relay interface Serial3.1 point-to-point bandwidth 64 ip address 192.168.1.1 255.255.255.0 frame-relay interface-dlci 150 ! interface Serial3.2 point-to-point bandwidth 64 ip address 192.168.2.1 255.255.255.0 frame-relay interface-dlci 250 Have fun, Vinnie ""sam sneed"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > Is this possible? On Cisco's site, their example uses 2 1604 routers. I have > a 2501 router and would like to know if this works before i buy a 2611.Need > to learn Frame Relay. > > Thanks alot in advance. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=39712&t=39617 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
