Frame Relay config on Ethernet interface?

[Cesar D'Suze Scott]

        Hi Guys.

        I was just looking at the help results on a ethernet interface, and it shows up some frame relay related commands. Between them is arp frame-relay, frame-relay intf-type nni, etc.

        Does it means that I can simulate a Frame-Relay Switch over an ethernet interface?. I think it's a crazy question, but with all of these "X over Y" features in the Cisco Routers, maybe this can be done.

        I did the "arp frame-relay", but when I try to put an frame-relay intf-type dce, it shows up the following message:

%Ethernet0 :Frame Relay not configured on interface

        Does anyone has tried this stuff?. It really could help me if it works, because I can use 2 2501 routers as a FR Switch with 2 interfaces (what a dreamer :).

        Some of the routers of the lab has the frame-relay commands, but some of them not. Even some of the with 11.3 does not have it.

        I really think this can't be done, but with all of these commands I get confused.

        Well, thanks in advance for your help. Below is the output of what I did.

        Bye.

C�sar Enrique

R6(config)#int eth 0
R6(config-if)#arp ?
  arpa         Standard arp protocol
  frame-relay  Enable ARP for a frame relay interface
  probe        HP style arp protocol
  snap         IEEE 802.3 style arp
  timeout      Set ARP cache timeout

R6(config-if)#frame-relay ?
  broadcast-queue      Define a broadcast queue and transmit rate
  de-group             Associate a DE group with a DLCI
  dlci-bits            Set number of bits in the DLCI
  interface-dlci       Define a DLCI as part of a subinterface
  intf-type            Configure a FR DTE/DCE/NNI interface
  inverse-arp          Enable/disable inverse ARP on a DLCI
  ip                   Frame Relay Internet Protocol config commands
  keepalive            Set LMI keepalive interval
  lmi-dlci             Replaced by LMI-TYPE command
  lmi-n391dte          set full status polling counter
  lmi-n392dce          LMI error threshold
  lmi-n392dte          LMI error threshold
  lmi-n393dce          set LMI monitored event count
  lmi-n393dte          set LMI monitored event count
  lmi-t392dce          set DCE polling verification timer
  lmi-type             Use CISCO-ANSI-CCITT type LMI
  local-dlci           Set source DLCI when LMI is not supported
  map                  Map a protocol address to a DLCI address
  multicast-dlci       Set DLCI of a multicast group
  payload-compression  Use payload compression
  priority-dlci-group  Define a priority group of DLCIs
  route                frame relay route for pvc switching
  short-status         Get short status from switch

R6(config-if)#frame-relay intf-type ?
  dce  Configure a FR DCE
  dte  Configure a FR DTE
  nni  Configure a FR NNI