alternative solution

korbenda11as · ‎04-01-2008

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?

mohammedmahmoud · ‎04-02-2008

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 · ‎04-02-2008

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 · ‎04-03-2008

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 · ‎04-06-2008

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 · ‎04-03-2008

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