radtest failed to send request to radius server having ipv6 address.

Hello, I have made radius server 3.0.5 setup in my PC. It worked fine with IPV4 addresses, radtest fails to send request with IPV6 addresses. Below command worked fine,user authenticated. radtest -x USER 72e#05 192.168.242.43 1812 testinglab Where as with IPV6 address it throws an error. radtest -x -6 USER 72e#05 2001:e30:1400:1:208:c7ff:fecf:9f0f 1812 testinglab (0) Error parsing "-": ip_hton: No address associated with hostname Please let me know how i should send radius auth requests with IPV6 address. Thanks, Manjunath