ORACLE EM-error add host

 Error Message: The Oracle Management Server (OMS) host and port specified via OMS_HOST and EM_UPLOAD_PORT is not available. Pass in a valid hostname and port number for the OMS to successfully deploy the agent.

make sure that your oms host and agent host are able to resolve each other. which means their entries should be present in /etc/hosts on each other and both able to ping each other using hostname

oms hosts

[root@oel6-rac01 agent_13.1.0.0.0]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.189.111 oel6-rac01.localdomain oel6-rac01
192.168.189.101 oel6-node01.localdomain oel6-node01
192.168.189.103 oel6-node03.localdomain oel6-node03 ==>
 agent host


[root@oel6-rac01 agent_13.1.0.0.0]# ping oel6-node03.localdomain
PING oel6-node03.localdomain (192.168.189.103) 56(84) bytes of data.
64 bytes from oel6-node03.localdomain (192.168.189.103): icmp_seq=1 ttl=64 time=0.380 ms
64 bytes from oel6-node03.localdomain (192.168.189.103): icmp_seq=2 ttl=64 time=0.937 ms
^C

agent hosts

[root@oel6-node03 ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.189.105 oel6-node05.localdomain oel6-node05
192.168.189.103 oel6-node03.localdomain oel6-node03
192.168.189.104 oel6-node04.localdomain oel6-node04
192.168.189.111 oel6-rac01.localdomain oel6-rac01 ===>
 oms host

[root@oel6-node03 ~]# ping oel6-rac01.localdomain
PING oel6-rac01.localdomain (192.168.189.111) 56(84) bytes of data.
64 bytes from oel6-rac01.localdomain (192.168.189.111): icmp_seq=1 ttl=64 time=0.702 ms
64 bytes from oel6-rac01.localdomain (192.168.189.111): icmp_seq=2 ttl=64 time=0.576 ms
^C

============================================

[root@epsdc53 ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
172.16.19.5  epsdc53.yogya.com  epsdc53
172.16.7.236  emserver.yogya.com emserver
172.26.30.250 srvem.localdomain  srvem
[root@epsdc53 ~]# ping srvem.localdomain
PING srvem.localdomain (172.26.30.250) 56(84) bytes of data.
64 bytes from srvem.localdomain (172.26.30.250): icmp_seq=1 ttl=58 time=4.78 ms
64 bytes from srvem.localdomain (172.26.30.250): icmp_seq=2 ttl=58 time=4.46 ms

-------------------

[root@srvem ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
172.26.30.250 srvem.localdomain  srvem
172.16.19.5 epsdc53.yogya.com  epsdc53
[root@srvem ~]# epsdc53.yogya.com
bash: epsdc53.yogya.com: command not found...
[root@srvem ~]# ping epsdc53.yogya.com
PING epsdc53.yogya.com (172.16.19.5) 56(84) bytes of data.
64 bytes from epsdc53.yogya.com (172.16.19.5): icmp_seq=1 ttl=60 time=4.40 ms
64 bytes from epsdc53.yogya.com (172.16.19.5): icmp_seq=2 ttl=60 time=3.95 ms

==========================================================

user=dbsnmp

pass=dbsnmp