01-28-2009 07:08 AM - edited 03-06-2019 03:42 AM
Hi all, can anyone tell me what labs I can do at home with some cisco 1700/1800 routers, both with serial / isdn cards and ethernet cards. I want to do some wan stuff, poss frame relay, isdn etc
01-28-2009 08:49 AM
For ISDN, you need buy a ISDN simulator.
For Frame-relay, you can configure your cisco router as a frame-relay switch.
01-28-2009 01:25 PM
do I need 3 routers for this then, 2 routers and 1 router as the frame relay switch?
Do ISP's use cisco routers for there frame relay switches?
how would I set up the frame relay switch?
01-29-2009 08:31 AM
Carl
1) You will need the following
3 x Cisco 2501's - or similar
2 x Cisco Back to Back DCE/DTE Cables
You need to connect them as follows
R1 DTE -- Cable -- DCE R2 DCE -- Cable DTE R3
2) ISP do not use Cisco routers as frame switches - not Cisco 2501's anyway this is purely for Labs etc
3) The frame switch will be configured like this
------------------------------------
hostname R2
!
frame-relay switching <-- look up this command
!
interface Serial0
no ip address
encapsulation frame-relay
clockrate 64000
frame-relay intf-type dce
frame-relay route 103 interface Serial1 301
!
interface Serial1
no ip address
encapsulation frame-relay
clockrate 64000
frame-relay intf-type dce
frame-relay route 301 interface Serial0 103
-----------------------------------------
01-29-2009 12:43 PM
do I have to use 2501's ? can I not use 2600, or 1700 with serial interfaces?
01-29-2009 01:32 PM
can I not use 2600, or 1700 with serial interfaces?
That shouldnt be a problem, and again it all depends on the type of config you wish to perform, if Frame-Relay then as the last post you can use a Frame-Switch. I use a Cisco 2500 series (specifically 2522 router)
Just remember a few helpful hints
1. Always check the clock rate and interface
you can do this via the sh controller interface command. make sure they match correctly Ex Rtr 1:DTE->Frame switCh-> DCE-> DCE -> Rtr2:DTE
2. If not using FR, tou can test by using the interface(HDLC) for testing
3.If using Frame remember that Point-to-Point uses frame-relay interface dlci "dlci#" and and Point-to-Multipoint uses the below to build ip adjacency
Ex: Frame-relay map ip x.x.x.x dlci y braodcast, where x.x.x.x is remote ip, and y is your local dlci number"
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