Frame Relay back to back

From: Wei Zou (wzou) (wzou@cisco.com)
Date: Wed Jun 25 2003 - 05:39:16 GMT-3


Hi:
I have following topology with Frame relay back to back:

R3-3640 ---304(dlci) ----403(dlci)----R5-4500

I have following configurations:
R3-3640#sh run int s3/0

interface Serial3/0
  ip address 1.1.1.1 255.0.0.0
  encapsulation frame-relay
  clockrate 64000
  frame-relay map ip 1.1.1.2 304 broadcast
  no frame-relay inverse-arp
  frame-relay intf-type dce
end

R4-4500#sh run int s4/0

interface Serial4/0
  ip address 1.1.1.2 255.0.0.0
  encapsulation frame-relay
  frame-relay map ip 1.1.1.1 403 broadcast
  no frame-relay inverse-arp
end

Questions:
1) If I don't configure intf-type dce on R3-3640, why the interface and
line protocol will be both down at two routers, do I have to configure one
side as FR switch?

2)with above configuration, why I can not ping each other. R4-4500 "show
frame map" shows 403 pvc deleted. in show frame pvc, R4-4500 shows 304
unused. If I change 403 to 304 which is the same as 304 in R3-3640,
everything works fine. Can not I have two different DLCI in this topology?
Is that because the switch side advertise 304 which get messed up with
static map 403 in the R4-4500?

can somebody share some thoughts here?
Thanks
Wei



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