FR cloud without dedicated FR switch router

From: Wojciech.Gebka@ssk.com.pl
Date: Fri Mar 07 2003 - 09:08:03 GMT-3


Hello everybody,

I'm working hard to prepare myself to Lab exam. Now I'm working about FR
cloud and IGP's. To test all features it is good to have min. 3 routers
connected to cloud (plus a FR switch router). Sametimes it is not possible
to have so many equipments for own usage (costs), particulary FR switch
router must to have many serial ports.
I found solution. In following lines are configs how to make a FR cloud
without dedicated FR switch router. :

Physical topology:

R1 (s0/0) ______________________________
               |
          (s0/1)
                                     R0 (s0/0) --------------(s0/0) R2

Logical topology:

R1 (s0/0) ________ ______________ (s0/0) R2
                                      | |
                                   (s0/0)
                                      R0

Configs:

R0 (must to by a FR DCE device):

frame-relay switching
!
interface Serial0/0
 ip address 10.1.1.1 255.255.255.0
 encapsulation frame-relay
 frame-relay map ip 10.1.1.2 100 broadcast
 frame-relay map ip 10.1.1.3 300 broadcast
 frame-relay intf-type dce

R1 (standard FR configuration):

interface Serial0/0
 ip address 10.1.1.3 255.255.255.0
 encapsulation frame-relay
 clockrate 128000

R2 (terminates one PVC and routes second)

interface Serial0/0
 ip address 10.1.1.2 255.255.255.0
 encapsulation frame-relay
 clockrate 2000000
 frame-relay route 300 interface Serial0/1 300
!
interface Serial0/1
 no ip address
 encapsulation frame-relay
 frame-relay intf-type dce
 frame-relay route 300 interface Serial0/0 300

It is working !

Any suggestions ?

Wojtek



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