Cannot contact any KDC in realm

[kannan rbk]

Dear Team,

I am trying to connect a remote machine (using kerberos
authentication) using ssh. But , I cannot able to connect the machine.
It is the below ssh trace.

 OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
    debug1: Reading configuration data /Users/bharathi/.ssh/config
    debug1: Reading configuration data /etc/ssh_config
    debug1: /etc/ssh_config line 17: Applying options for *
    debug1: Connecting to 192.168.15.14 [192.168.15.14] port 22.
    debug1: Connection established.
    debug1: identity file /Users/bharathi/.ssh/id_rsa type -1
    debug1: identity file /Users/bharathi/.ssh/id_rsa-cert type -1
    debug1: identity file /Users/bharathi/.ssh/id_dsa type -1
    debug1: identity file /Users/bharathi/.ssh/id_dsa-cert type -1
    debug1: Enabling compatibility mode for protocol 2.0
    debug1: Local version string SSH-2.0-OpenSSH_6.2
    debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3
    debug1: match: OpenSSH_5.3 pat OpenSSH_5*
    debug1:  Miscellaneous failure (see text)
    unable to reach any KDC in realm ZMEDIA.COM, tried 3 KDCs

    debug1:  An invalid name was supplied
    unknown mech-code 0 for mech 1 2 752 43 14 2

    debug1:  Miscellaneous failure (see text)
    unknown mech-code 0 for mech 1 3 6 1 5 5 14

    debug1:  Miscellaneous failure (see text)
    unknown mech-code 2 for mech 1 3 6 1 4 1 311 2 2 10

    debug1:  An unsupported mechanism was requested
    unknown mech-code 0 for mech 1 3 5 1 5 2 7

    debug1:  Miscellaneous failure (see text)
    unknown mech-code 0 for mech 1 3 6 1 5 2 5

    debug1: SSH2_MSG_KEXINIT sent
    debug1: SSH2_MSG_KEXINIT received
    debug1: kex: server->client aes128-ctr hmac-md5 none
    debug1: kex: client->server aes128-ctr hmac-md5 none
    debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
    debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
    Connection closed by 192.168.15.14


Remote Machine : Cent Os 6.4 final

Client Machine : Mac OS X 10.9


Please help me to fix the problem. This problem is intermittent ,
sometimes I can able to connect the machine.

If you need any other information , let me know.