How many routers for Frame Relay?

[likes2hack]

To setup FR over serial I know you only need two routers that have serial connections. Set one up as DCE and the other as DTE. But a friend of mine said that to do "true" Frame Relay you need at least 3 routers.

I'm not sure what he means since I'm new to FR. Is he talking about routing the frame or am I missing something else? What's the minimum number of routers needed to actually do Frame Relay routing for a home lab for example?

 

[wybnormal]

What your friend means is that in order to have DLCIs, you need a frame switch. That is the function of the 3rd router. You turn it into a frame switch and now you can set up with real DLCIs and LMIs just like a real frame installation.

When you run two routers back to back, you cna use the frame encapsulation but you have to disable things like LMI.

MikeS
Find me at

http://www.packetattack.com

"Take advantage of the enemy's unreadiness, make your way by unexpected routes, and attack unguarded spots."
Sun Tzu

 

[techkiwi]

How do you configure the third router to act like a frame relay switch?

 

[webkidme]

you might want to take a look at the sample config here:

http://www.cisco.com/warp/public/125/fr_switching.html

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"Real men don't use backups, they post their stuff on a public ftp server and let the rest of the world make copies."
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[wybnormal]

hostname america
!
frame-relay switching
!
!

read this:

http://www.cisco.com/warp/public/125/fr_switching.html

MikeS


Find me at

http://www.packetattack.com

"Take advantage of the enemy's unreadiness, make your way by unexpected routes, and attack unguarded spots."
Sun Tzu