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Wrong NIC configuration causing CORBA user frequently logout.

Publication Date:  2012-07-25 Views:  50 Downloads:  0
Issue Description
It was escalated by customer that EMS session between HP TemIP (OSS) and N2000 BMS disconnecting frequently. CORBA NBI is used to integrate the N2000 BMS with HP TemIP for alarm extension. The network connectivity is as follows;

N2000BMS V200R010>>AR-4046>> Backbone network>>OSS

OS: Windows2003
Alarm Information

NULL
Handling Process
We checked the corba configuration and found normal. PING between OSS and N2000 found OK. Then analyzing user logs of N2000, we found CORBAuser is logout and from logs user logout after 5 minutes of login repeatedly. The logs show that user login with correct IP of OSS but logout with wrong IP (169.254.159.140) which was from local link IPs as mentioned in user logs.
-------------------------------------------------------------------------------------------------------------------------
|  User Logout      |  n2000corba1      |  2012-02-13       |  169.254.159.140  |  Security         |  Succeed          |  
|                   |                   |  11:46:18         |                   |  Management       |                   |  
|                   |                   |                   |                   |  Module           |                   |  
-------------------------------------------------------------------------------------------------------------------------
|  User Login       |  n2000corba1      |  2012-02-13       |  172.31.71.29     |  Security         |  Succeed          |
|                   |                   |  11:46:30         |                   |  Management       |                   |
|                   |                   |                   |                   |  Module           |                   |
-------------------------------------------------------------------------------------------------------------------------
|  User Logout      |  n2000corba1      |  2012-02-13       |  169.254.159.140  |  Security         |  Succeed          |
|                   |                   |  11:56:18         |                   |  Management       |                   |
|                   |                   |                   |                   |  Module           |                   |
-------------------------------------------------------------------------------------------------------------------------
|  User Login       |  n2000corba1      |  2012-02-13       |  172.31.71.29     |  Security         |  Succeed          |
|                   |                   |  11:57:03         |                   |  Management       |                   |
|                   |                   |                   |                   |  Module           |                   |
-------------------------------------------------------------------------------------------------------------------------
|  User Logout      |  n2000corba1      |  2012-02-13       |  169.254.159.140  |  Security         |  Succeed          |
|                   |                   |  12:02:18         |                   |  Management       |                   |
|                   |                   |                   |                   |  Module           |                   |
-------------------------------------------------------------------------------------------------------------------------
|  User Login       |  n2000corba1      |  2012-02-13       |  172.31.71.29     |  Security         |  Succeed          |
|                   |                   |  12:02:36         |                   |  Management       |                   |
|                   |                   |                   |                   |  Module           |                   |
-------------------------------------------------------------------------------------------------------------------------
The server has two NIC but only one is used for OSS and NE integration. The used NIC is manually configured according to plan IPs. The second NIC is not used for any connectivity but was enabled and getting local link IP configurations. This was the problem that IP is not accessible for OSS, and user automatically logout using this IP. When we disable this interface the EMS session becomes stable.

Root Cause
1- Incorrect CORBA configuration.
2- Network time out.
3- Network Interface configuration.

Suggestions

Do not enable unwanted NIC interface otherwise configure the naming service with external IP address and port that is always accessible from OSS.

END