You can configure the router to accept or reject SA request
                messages from a specified MSDP peer or all peers. If an
                SA request filter is specified, only SA request messages from those groups permitted
                are accepted. All others are ignored.
        
        - 
                Configure the router to accept SA request messages
                    from a specified MSDP peer or all peers using the command:
                
enable msdp [{peer} remoteaddr | peer
                        all] process-sa-request {sa-request-filter
                        filter-name } {vr
                        vr_name} 
             - 
                Configure the router to reject SA request messages
                    from a specified MSDP peer or all peers using the command:
                
disable msdp [{peer} remoteaddr | peer
                        all] process-sa-request {vr
                        vrname} 
             - 
                Display configuration and run-time parameters
                    about MSDP peers using the command:
                
show msdp [peer
                            {detail} | {peer} remoteaddr] {vr
                        vr_name}