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Apr 1st, 2008

what other solution I can do to use my frame relay switch router to remote other connected routers. I have two routers connected to this frame switch using back-to-back serial connector. My understanding is that frame switch is transparent to other routers. Are there any other configurations I can use to use my frame switch to telnet to other routers?

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mohammedmahmoud Wed, 04/02/2008 - 01:09

Hi Oliver,

Your understanding is correct. The only thing that can pop up to my mind, is a work around that i've used during my CCIE lab preparation, i was out of routers, and i needed to use the router acting as the FR Switch as a router in the scenario. Ok, all you need is a couple of serial interfaces on the FR Switch, connect them together (imagine that its another router connected to the FR Switch) and configure 2 new PVCs on the FR Switch with both your routers, and now you can access both routers from the router acting as the FR Switch.

BR,

Mohammed Mahmoud.

korbenda11as Wed, 04/02/2008 - 20:00

Are you trying to say, I will make a loop connection between two serial interfaces?

can you share me the configuration you used for that workaround? thanks...

nikhil.engineer Thu, 04/03/2008 - 18:45

hi,

Try this. It should work

FR

---------------------------------

frame-relay switching

!

interface Serial1/0

no ip address

encapsulation frame-relay

serial restart_delay 0

frame-relay intf-type dce

frame-relay route 102 interface Serial1/1 201

!

interface Serial1/1

no ip address

encapsulation frame-relay

serial restart_delay 0

frame-relay intf-type dce

frame-relay route 201 interface Serial1/0 102

R1

---------------------

interface Serial1/0

no ip address

encapsulation frame-relay

!

interface Serial1/0.102 point-to-point

ip address 172.16.12.1 255.255.255.0

frame-relay interface-dlci 102

R2

-----------------------------

interface Serial1/0

no ip address

encapsulation frame-relay

!

interface Serial1/0.201 point-to-point

ip address 172.16.12.2 255.255.255.0

frame-relay interface-dlci 201

HTH.

Cheers,

Nikhil E.

mohammedmahmoud Sun, 04/06/2008 - 01:46

Hi Oliver,

Sorry for the late reply, i was checking the old threads and found your respond to my reply, anyway yes that was my opinion, below is how the configuration should look like:

frame-relay switching

interface serial2/1

description FRSW routed interface

encapsulation frame-relay

no frame-relay inverse-arp

ip address 10.1.1.1 255.255.255.0

frame-relay map ip 1.1.1.2 102 broadcast

frame-relay map ip 1.1.1.3 103 broadcast

!

interface Serial2/2

description FR Switching port connected to the FRSW

no ip address

encapsulation frame-relay

clock rate 64000

frame-relay intf-type dce

frame-relay route 102 interface Serial2/3 201

frame-relay route 103 interface Serial2/4 301

!

interface serial 2/3

description FR Switching port connected to R1

no ip address

encapsulation frame-relay

clock rate 64000

frame-relay intf-type dce

frame-relay route 201 interface Serial2/2 102

frame-relay route 203 interface Serial2/4 302

!

interface serial 2/4

description FR Switching port connected to R2

no ip address

encapsulation frame-relay

clock rate 64000

frame-relay intf-type dce

frame-relay route 301 interface Serial2/2 103

frame-relay route 302 interface Serial2/3 203

BR,

Mohammed Mahmoud.

Giuseppe Larosa Thu, 04/03/2008 - 09:39

Hello,

interesting question.

A FR switch is still a router and can do what you want if you use an additional DLCI that is not Frame Relay switched using the command frame-relay route

see the following from my lab:

interface Serial3/3

description verso c3745b-ser3/0

no ip address

encapsulation frame-relay

serial restart_delay 0

frame-relay intf-type dce

frame-relay route 705 interface Serial3/2 507

frame-relay route 706 interface Serial3/5 607

!

interface Serial3/3.701 point-to-point

ip address 192.168.37.6 255.255.255.252

frame-relay interface-dlci 701

!

Of course on other interfaces the FR switch can be a PE router for example.

Hope to help

Giuseppe

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