How to make a Frame relay cloud ...Help

Answered Question
Oct 10th, 2008

Hai,

i ve 3 routers and 2 L3 switches ...

2 1721 series

1 1821 series

2 3750 series

can i create "Simple" frame relay cloud using this ..if not how many routers are needed for this ....thought of doing ospf in frame relay cloud ...Help pls

ujil

Correct Answer by Giuseppe Larosa about 8 years 4 months ago

Hello Ujil,

a good link is the following to FR switching config examples

http://www.cisco.com/en/US/docs/ios/12_1/wan/configuration/guide/wcdfrely.html#wp1002491

http://www.cisco.com/en/US/docs/ios/12_1/wan/configuration/guide/wcdfrely.html#wp1003624

When connecting routers back to back with serial interfaces you need :

to provide clock with clockrate on the interface were the DCE V.35 cable is connected (V.35 female to check cable use sh controller serial x/y but not supported on all platforms)

to define one side as the FR DCE that will behave as the FR switch (that here is not present).

Frame-relay DCE is defined on the router that performs frame-rel switching

Topology is simple : have every router connected with a serial interface to a serial interface of the router acting as FR switch

using the notes above.

Use on DTE routers point-to-point and point-to-multipoint subifs according to your needs to deploy different topologies.

Hope to help

Giuseppe

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Giuseppe Larosa Fri, 10/10/2008 - 09:02

Hello lijesh,

to be able to emulate a FR cloud with a Hub router and two spokes you will need another router.

Try to find a 2500 router with 3 serial interfaces

Hope to help

Giuseppe

bagvanliju Fri, 10/10/2008 - 09:30

hai Giu,

thanks alot ...will try the same ....one more help reqrd ...cud u share the config/toplogy ...so it wud b easy for me ..to execute the same ...

ujil

Correct Answer
Giuseppe Larosa Fri, 10/10/2008 - 12:55

Hello Ujil,

a good link is the following to FR switching config examples

http://www.cisco.com/en/US/docs/ios/12_1/wan/configuration/guide/wcdfrely.html#wp1002491

http://www.cisco.com/en/US/docs/ios/12_1/wan/configuration/guide/wcdfrely.html#wp1003624

When connecting routers back to back with serial interfaces you need :

to provide clock with clockrate on the interface were the DCE V.35 cable is connected (V.35 female to check cable use sh controller serial x/y but not supported on all platforms)

to define one side as the FR DCE that will behave as the FR switch (that here is not present).

Frame-relay DCE is defined on the router that performs frame-rel switching

Topology is simple : have every router connected with a serial interface to a serial interface of the router acting as FR switch

using the notes above.

Use on DTE routers point-to-point and point-to-multipoint subifs according to your needs to deploy different topologies.

Hope to help

Giuseppe

bagvanliju Fri, 10/10/2008 - 21:59

Hai Giu,

Thanks a lot for the help will try to execut the same and let you know the status ...

thanks a lot once again

ujil

sdoremus33 Fri, 10/10/2008 - 09:32

I currently am working on CCIE and had to emaulate a frame switch (frame cloud) I used (3) 3620 routers and as the frame switch 2514 I believe

If you need any help with the config let me know. Thanks and have a great day

bagvanliju Fri, 10/10/2008 - 09:37

hai,

unfortunatly i dont ve higher end router in my lab ..so ...would b difclt for me ...what i wanted was to get familiar with NBMA (practically) ...which used to me confuse me a lot ......if u can share the topology and config (if its simple ) i can go tru that ..

thanks alot

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