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Wrong opposite NE due to NE ID conflict

Publication Date:  2012-07-25 Views:  67 Downloads:  0
Issue Description

We have a network as per the above scenerio. When we login from NE1 and search for all NEs in the network, we cannot login NE3. When we try to seach for the opposite NE of NE1, we get NE3 as the opposite NE instead of NE2 whereas we have link of NE1--NE2---NE3--NE4. The situation became very tricky and we needed to find out the solution.
Alarm Information
Null
Handling Process
We first changed the NE ID of NE1 to some other ID not in the network. Now we got all the NEs visible. After that we changed the NE ID of NE3 to different as per planning and then logged all NEs. At last we changed the NE ID of NE1 to the NE ID given by planning team.Now we checked the opposite NE from NE1 and got NE2 as expected instead of NE3.Thus the issue got resolved.
Root Cause
When we checked for all the configurations, we found out that two sites NE1 and NE3 NE ID is same. Due to this when we search for the opposite NE, from NE1 we search for the opposite NE, we get NE3 instead of NE2 as the identity of two NEs became same and NE3 gave the reply to NE1 instead of NE2.
Suggestions
We should always be cautious while giving NE ID in any NE and provide it as per planning and not arbitarily. If we face the issue as above, we should check for the opposite NE and troubleshoot in the same way.

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