frame relay question for learning DLCIs
Posted on 2010-11-09
I am studying for my CCNA and have a few questions regarding frame relay DLCI's. I am trying to understand how they work on a router and what they refer to.
For an example we have the following setup:
R1---------Frame Relay Switch--------------R2
Now on R1 I use the commands for a point-to-point connection
ip address 192.168.1.1 255.255.255.0
frame-relay interface-dlci 100
On R2 i use
ip address 192.168.1.2 255.255.255.0
frame-relay interface-dlci 200
First thing that I need to be sure about, is that there is only one PVC in this example. It is my understanting that a PVC refers to a router to router connection, in this example from R1 to R2. Is this correct?
Secondly am I correct in saying that the DLCI refers to section of the PVC between the router and the frame relay switch?
Lastly when you configure the command "frame-relay interface-dlci 100" on R1, the DLCI 100 is refering to the link between itself (R1) and the frame relay switch. It is then the frame relay switch's job to pass the frame received from R1 along the DLCI 200, then reaching R2 (after switching the DLCI identifier). Does this sound correct?