HI Ravinder Kumar,
check that device telnet had successful or not,if these devices cannot telnet the 1610/1611 ports on the relay, this means there is no communication. It is the prerequisite of BCM that these ports should be opened on all the systems which have BCM agent installed. If we does not meet this requirement we cannot have these devices in the BCM.
so kindly open below mention port and check and then check.
General agent communication port as configured (default is 1610)
General console management port as configured (default is 1611)
Bandwidth management port on relay servers (default is 1609)
MyApps port on master server (default is 1612)
Port used for third-party integrations and set with a specific SSL certificate (default is 1616)
TCP ports scanned for auto-discovery (default is 23,25,139)
Multicast transfer agent listening port as configured (default is 2500)
Active directory LDAP
LDAP port (default is 389)
Thanks and Regards,