08-04-2007 05:26 PM - edited 03-03-2019 06:11 PM
I have the following setup on a router to a DR site and I would like to simulate this in a lab environent.
The connection is a DS3 and is frame relay.
Is there any way to simulate this on a regular point-to-point T1 connection with a crossover cable from WIC T1 CSU/DSU to WIC T1 CSU/DSU?
I know I can simulate frame-relay with a third router, but I was hoping to do something with just a point-to-point and two routers.
The existing config is this on one side:
interface Serial1/0
description connected to DS3
no ip address
encapsulation frame-relay IETF
ip route-cache flow
load-interval 30
dsu bandwidth 44210
framing c-bit
cablelength 50
clock source internal
serial restart-delay 0
frame-relay lmi-type ansi
frame-relay intf-type dce
!
interface Serial1/0.4 multipoint
description Bridge VLAN 4
frame-relay map bridge 4 broadcast
frame-relay interface-dlci 4
bridge-group 3
!
interface Serial1/0.100 point-to-point
ip address 1.1.2.65 255.255.255.252
frame-relay interface-dlci 100
!
interface Serial1/0.101 multipoint
description Bridged VLAN 5
frame-relay map bridge 101 broadcast
frame-relay interface-dlci 101
bridge-group 1
!
interface Serial1/0.250 multipoint
description Bridge VLAN 2
frame-relay map bridge 2 broadcast
frame-relay interface-dlci 2
bridge-group 2
08-04-2007 06:07 PM
As long as I know you can connect 2 wics CSU/DSU back to back, you just need to make a crossover cable, you can find the pin-out at cisco.com
About the Frame-relay configuration check this link http://www.cisco.com/warp/public/125/frbacktoback.html
there are the configs to setup a frame-relay lab with two routers in the above link, and in the link below you will find the way to config the cross cable.
http://www.cisco.com/en/US/products/hw/routers/ps233/products_tech_note09186a00800a3f09.shtml
Let us know how works the lab!!!
08-04-2007 08:44 PM
Richard
It certainly is possible to set up 2 routers with a back to back serial connection and to configure the link as frame relay. But since there is no device to provide the Frame Relay switching, the ability to really emulate Frame Relay is pretty limited. I am not clear from your description how closely and exactly you need to emulate the Frame Relay environment.
Your configuration has 4 subinterfaces (with multipoint and point to point). You might be able to emulate 1 of the point to point but I think you can not really emulate the multipoint. And I do not believe that 1 router back to back can possibly emulate 4 subinterfaces.
HTH
Rick
08-04-2007 08:45 PM
Thanks
08-04-2007 09:42 PM
You may also try this software, although still under developement, with it you can emulate your above configuration.
08-05-2007 12:13 AM
As Rick said, you need to configure frame-relay switching and also specify the DCE terminal
Here is what i do for a lab but again the capabilities are limited
router1
frame-relay switching
int serial 2/0
encap frame-relay ietf
frame-relay lmi-type ansi
frmae-relay intf-type dce
int serial 2/0.16 point-to-point
ip address x.x.x.x y.y.y.y
frame-relay interface-dlci 16
router 2
int serial 1/0
encap frame-relay ietf
frame-relay lmi-type ansi
int serial 1/0.16 point-to-point
ip address x.x.x.x y.y.y.y
frame-relay interface-dlci 16
HTH
Narayan
08-05-2007 08:56 AM
Many thanks to everyone.
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