Chapter 8 Troubleshooting Tips

High Availability and Failover

Conflicts in Datastore Control Center history

Symptom With high availability, messages appear in the comment column in the subscription agent history. To see the message from CRS Administration, select Datastore Control Center > History for a subscription agent.

Error Message A message similar to Downloaded 111 data changes (0 inserts, 111 updates, 0 deletes, 111 conflicts)appears.

Possible Cause To support high availability, SQL merge replication is being used to replicate data between the subscriber node and the publisher. As part of this, SQL logs these messages in the subscription agent history.

Recommended Action No user action required.

Cannot make configuration changes in HA cluster

Symptom Unable to make configuration changes in a high availability cluster when one node is down.

Error Message None.

Possible Cause If one node is down, configuration changes cannot be made because the changes are written to both configuration datastores at the same time.

Recommended Action Do the following:

Step 1 Make sure that the Publisher is the active node. If it is not, use CRS Administration to make it the active node for all datastores.

Step 2 Deactivate CDS and HDS for the inactive node using the Component Activation link.

Cannot make configuration changes in RmCm Subsystem

Symptom In a high availability deployment, the user cannot make changes to the configuration in the RmCm subsystem, such as add/remove skills, team and so forth.

Error Message There was an error reading/updating the database. Please contact your administrator.

Possible Cause Unified CCX stores configuration data in Configuration Datastore, which is managed by the Microsoft SQL database. The high availability databases use Microsoft Distributed Transaction Coordinator (MS DTC) service to communicate with each other, and MS DTC service uses the NetBIOS name of its peer to talk to other MS DTC services. This problem is caused by invalid name resolution of the database nodes so that MS DTC cannot communicate.

Recommended Action Make sure the two database nodes can communicate with each other, not just by IP address, because DTC also requires that you are able to resolve computer names by way of NetBIOS or DNS. You can test whether or not NetBIOS can resolve the names by using ping and the server name. The client computer must be able to resolve the name of the server, and the server must be be able to resolve the name of the client. If NetBIOS cannot resolve the names, you can add entries to the LMHOSTS files on the computers.

Cisco Customer Response Solutions Servicing and Troubleshooting Guide, Release 5.0(1)

8-73

Page 136 Page 138
Page 137
Image 137
Cisco Systems 5.0(1) manual Conflicts in Datastore Control Center history, Cannot make configuration changes in HA cluster
Page 136 Page 138

5.0(1) specifications

Cisco Systems 5.0(1) marks a significant development in the realm of networking technology, providing an upgraded platform designed to accommodate the ever-evolving demands of modern enterprises. This version is characterized by its robust set of features and cutting-edge technologies, enabling organizations to optimize their network performance, streamline operations, and enhance security.

One of the hallmark features of Cisco Systems 5.0(1) is its improved security protocols. The system introduces advanced encryption methods and enhanced access control mechanisms that ensure data integrity and confidentiality. These features are particularly important in a world where cyber threats are increasingly sophisticated. The integration of Security Intelligence capabilities allows administrators to detect anomalies and respond to potential threats in real-time, thus safeguarding sensitive information.

Another key characteristic of Cisco 5.0(1) is its support for software-defined networking (SDN). This technology allows for more effective resource management by enabling dynamic allocation of bandwidth in response to user needs. The network becomes more agile, facilitating rapid deployment and scalability. Cisco’s SDN capabilities also include enhanced automation features, which significantly reduce the manual effort required for network configuration and management, leading to increased operational efficiency.

In addition to SDN, Cisco 5.0(1) embraces innovations in cloud computing. The platform seamlessly integrates with cloud-based services, allowing organizations to manage their resources without the constraints of hardware limitations. This not only improves flexibility but also reduces operational costs, aligning with the financial strategies of modern businesses.

Moreover, Cisco 5.0(1) boasts improved user interfaces and management tools. The intuitive dashboard provides administrators with comprehensive visibility into network performance, allowing for quick identification of issues and facilitating better decision-making. Enhanced analytics capabilities provide insights into traffic patterns and device usage, empowering organizations to make informed adjustments to enhance network performance.

Finally, the platform is designed with interoperability in mind. Cisco Systems 5.0(1) supports a wide array of devices and integrates smoothly with other vendor technologies, which is essential in diverse networking environments.

In summary, Cisco Systems 5.0(1) delivers advanced security features, embraces software-defined networking, enhances cloud integration, offers user-friendly management tools, and supports interoperability. Together, these characteristics position Cisco as a leader in the networking industry, prepared to meet the challenges of tomorrow’s technological landscape.
Top Page Image Contents