Hello Ramnet,
for a point-to-multipoint communication you would need a FR WAN service because having a collection of leased lines is not enough to achieve this.
In the case you have bought access links to a FR service you can implement a classic hub and spoke topology with your central site acting as hub.
the FR service provider will give you the right DLCI to be used on each PVC.
You need three FR PVCs
Central site - remote site1
Central site - remote site2
Central site - remote site3
Hub router 2800
R2800#
int ser0/0
enc frame-relay
no ip address
int ser0/0.100 multipoint
ip address 10.10.10.1 255.255.255.0
frame-relay map ip 10.10.10.2 101 broadcast
frame-relay map ip 10.10.10.3 102 broadcast
frame-relay map ip 10.10.10.4 103 broadcast
Remote1
int ser0/0
enc frame-relay
no ip address
int ser0/0.100 multipoint
ip addr 10.10.10.2 255.255.255.0
frame-rel map ip 10.10.10.1 201 broadcast
you need a routing protocol to advertise the local client vlan subnets
using EIGRP or RIPv2 the central site needs split-horizon to be disabled
central site
router eigrp 100
network 10.0.0.0 0
no auto-summary
int ser0/0.100
no ip eigrp 100 split-horizon
on each remote (the EIGRP AS must be the same)
router eigrp 100
network 10.0.0.0
network 192.168.x.0
no auto-summary
x=1 for remote site1, 2 for remote site2 and so on
Hope to help
Giuseppe
