Cisco Discovery Protocol (CDP) support has been introduced in 12.2(8)T via CSCdt03339. Currently, CDP is only supported on AAL5SNAP RFC1483 PVCs and only on point-to-point Subinterfaces. Multipoint subinterface support is not planned as yet. So assuming you are using aal5snap encapsulation and the code specified and point to point sub-interfaces you should be able to use CDP.
Also the following versions are supported if you were interested:
So you are doing ATM to Frame Relay (FRF.x?). I did not get this for some reason out of your original post. In this case CDP will not work. ATM end to end is supported with the criteria specified. What is your requirement? Possibly there is something other than CDP that will get this to work for you.
Within your network discovery setup on CWSI can you not specify a ping spray as well as a discovery method? CDP is one way of doing discovery but the ping option (given a network range) should do the trick. Also within newer Cisco works discovery (don't know the version) there are some enhancements being made to allow some routing protocols to be used in this process as well (BGP/OSPF) that would possibly help you.
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