Troubleshooting Networking Issues

Name Server Unresponsive

Description

All NIS, LDAP, or DNS servers are unreachable or not responding.

Workaround

For each server:

 

1.

Ping the server from a client on NAS cluster solution subnet and verify it

 

 

responds.

 

2.

Issue a request to the server from a client on the NAS cluster solution subnet and

 

 

verify it responds.

 

3.

Check server logs to understand the cause the server fails to respond to requests.

Specific Subnet Clients Cannot Access The NAS Cluster Solution

Description

Cause

Workaround

Users (new or old), accessing from specific network(s) or cannot access the NAS cluster solution.

This issue is due to a conflict between the users' subnet addresses and the NAS system internal network's address. The NAS system routes the response packets to the incorrect network.

1.Check the internal network addresses of the NAS system and verify if there is a conflict with the problematic client network addresses.

2.If a conflict exists, manually change the conflicting NAS internal network address using either the NAS Manager or CLI.

Troubleshooting DNS Configurations

Description

Unable to connect to the NAS cluster solution using the system name and/or unable

 

to resolve host names.

Cause

Probable causes may be:

 

• Unable to ping system using Fully Qualified Domain Name (FQDN).

 

• Unable to connect to the NAS Manager using system name.

Workaround

1.

Verify that the client IP information is set correctly.

 

 

2.

Verify that the NAS cluster solution controller is configured to the correct DNS

 

 

server.

 

3.

Contact DNS server administrator to verify the DNS record creation.

Determining The IQN Of The NAS Cluster Solution Controllers Using CLI

Description

Workaround

Determining the IQN of the NAS cluster solution controllers using CLI.

Using an ssh client and the NAS Management VIP, log in to the NAS cluster solution CLI as an admin.

From the command line, type the following command:

system maintenance luns iscsi-configuration view

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Dell NX3610, NX3500, NX3600 Troubleshooting Networking Issues, Name Server Unresponsive, Troubleshooting DNS Configurations

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