Serial Connection between Routers
I am trying to set up a CCIE pratice lab. Due to short of routers, I have to use a few Cisco c3250 mobile routers that I have. My cisco c3250 routers has two DB-9 serial ports with male connectors. I am trying to connect the serial port of the c3250 router to the serial port of my frame-relay switch (Cisco c2811 router with HWIC) with a CAB-SS-232FC cable (DB25F to Smart) + a Straight Serial cable (DB25M to DB9F). I got a link. The frame-relay switch shows as DCE V.24 and c3250 shows as DTE V.24. However, the LMI does not work with keepalive on. The DTE side keeps sending the keepalive message with "youseen=0". The DCE side shows "DCE LMI timeout". The interfaces on the both ends show "UP", but the line protocol is down. If I disable the keepalive, the interfaces show "UP, UP". However, I could not pass any traffic. Do any of you know what problem that I have and how should I resolve it?
Thank you in advance!