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ZfS Failure to Communicate Error

Novell Cool Solutions: Trench
By Sally Barker

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Posted: 13 May 2002
 

Version: ZENworks for Servers 3

I think I can further help with this Q&A. Here's what you said:

Question:
I've installed ZfS 3 using NetWare 6 as my Management and Monitoring Server. I've also installed the Management Agent on a Windows 2000 Server. So far, the NetExplorer agent has been running for 3 hours but has not been "found" with Windows 2000 server. I also do not have an "Area" listed under Atlas; only "WAN" and "Islands". Under "Islands"; I have the 10.0.0.0 subnet which contains the NetWare 6 and the workstation IP Address I used to install ZfS3. If I click on the "Segment Dashboard" for the subnet object; I get this error. Failed to communicate with the device. Possible causes are:

  1. The Device is down or not responding
  2. The community strings are not correct
  3. The network is slow or unresponsive

However --

  1. I can login to and access the server specific ZfS3 functions
  2. I have set and verified the community strings as public
  3. I'm using the NetWare 6 DigitalAirlines Demo Image with a 10/100 switch with only the two nodes (NW6DA1 and W2K-S1)

Answer:
Here are a few troubleshooting suggestions.

Try using TCPCON on the server and change the IP address to be the node you want to discover. This will verify whether your SNMP community strings are right.

You might need to use a seed router and add additional routers in NXPCON.

Be patient. It often takes four days or so to discover everything.


My Solution

If I click on the "Segment Dashboard" for the subnet object; I get this error.

Failed to communicate with the device. Possible causes are:

1.The Device is down or not responding
2.The community strings are not correct
3.The network is slow or unresponsive

Segment Dashboard is functionality found within the Traffic Analysis (LANalyzer) component of ZfS. Traffic Analysis requires that the WRITE SNMP community string be enabled. I will assume the reader is running the Traffic Analysis component on the NetWare 6 Site Server box. By default, NetWare has the WRITE SNMP community string disabled. Therefore, use INETCFG to enable the WRITE SNMP community string and set the community name to "public" (or whatever your standards are).

Another possible cause: This segment is using the "traffic analysis/LANalyzer" feature from another device, e.g., an SNMP-enabled switch. There is a way in ConsoleOne to determine and change the default SNMP device the segment is using. From memory, (but can't verify): Right-click on the segment, go to Properties(?), there will be a checkmark next to the SNMP device this segment is currently using. You can change it, if necessary, to the NetWare 6 box.

I've seen the above error many times - and one of these two solutions has always fixed it for me. Good Luck!!

If you have any questions you may contact Sally at sbarker@tenacious.ws


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