A Frame Relay Topology In GNS3
You can reproduce this topology -and its configuration- for your CCNP Routing&Switching or CCNP Collaboration studies on GNS3.
A lot of CCNP’s like me remember this famous topology from the old BSCI exam. In the new CCNP Routing&Switching syllabus, frame relay has been wiped out.
Frame relay topology
We’re going to use this topology:
And the logical topology in terms of frame relay DLCI circuits is the following:
PSTN router has three DLCIs:
- DLCI 401 with HQ router
- DLCI 402 with BR1 router
- DLCI 403 with BR2 router
The other routers connect to the frame relay networks as follows:
- HQ router has DLCI 101
- BR1 router has DLCI 102
- BR2 router has DLCI 103
In this topology:
- Traffic from any router goes through PSTN router before it reaches its final destination. It’s a hub-and-spoke topology; PSTN router is the hub, the remaining routers are the spokes.