R1#sh run | i dlsw
dlsw local-peer peer-id 17.57.100.1
dlsw remote-peer 0 frame-relay interface Serial0/0 102
dlsw bridge-group 1   <------------ on all routers with ethernet
R1#sh run int e 0/0
Building configuration...

Current configuration : 96 bytes
!
interface Ethernet0/0
 ip address 17.57.100.1 255.255.255.0
 half-duplex
 bridge-group 1  <--------------- on all routers with ethernet
end

R1#