That has slowed me down fixing some DB replication issues. Its does a great job of explaining how to troubleshoot issues with DB rep beyond "just restart the servers and hope for 2's". If no, contact Cisco TAC. This is used to determine to which servers replicates are pushed. If the Sqlhosts are mismatched along with the host files, follow For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. admin:utils dbreplication runtimestate Verify database replication is broken. This is likely the best summary of dbreplication I've found yet. Example: 12 Servers in of sync ornot requested statuses. This document will explain a little about the output to assist people in their learning and in their troubleshooting efforts. "RPC" only instead of DB/RPC/DBMonii. This state indicates that replication is in the process of trying to setup. After you complete Step4, if there are no issues reported, run the. Required fields are marked *. (RTMT) & details, ----------- ------------ ------ ---- ----------- ----- ------- ----- -----------------, PUB X.X.X.80 0.173 Yes Connected 0 match Yes (2) PUB Setup Completed, tftp1 X.X.X.81 0.259 Yes Connected 0 match Yes (2) Setup Completed, tftp2 X.X.X.82 0.203 Yes Connected 0 match Yes (2) Setup Completed, sub1 X.X.X.83 0.267 Yes Connected 0 match Yes (2) Setup Completed, sub2 X.X.X.84 0.358 Yes Connected 0 match Yes (2) Setup Completed, sub3 X.X.X.85 0.247 Yes Connected 0 match Yes (2) Setup Completed, sub4 X.X.X.86 0.952 Yes Connected 0 match Yes (2) Setup Completed, Replication Status Definitions: a. Ensure Replication Server List (cdr list serv) is populated for all the nodes. During normal operation the subscribers will not use their read only copy of the database, they will use the publisher's database for all read and write operations. If any errors/mismatches are discovered, they are shown in the output and the RTMT state changes accordingly, as shown in this image. Cisco Unified Reporting on Cisco Unified Communication Manager (CUCM). The following table lists each command and it's function. 'utils dbreplication runtimestate' then shows the actual status of the server. (, All nodes in the cluster are in Replication State = 3. database replication issues when theservers are defined using the 12:47 PM. Publisher must be able to reach all subscribers and network connectivity result must be completed successfully. Ensure that: The nodes are in the same Data Center/Site: All the nodes are Please run the command 'utils dbreplication runtimestate' and make sure all nodes are RPC reachable before a replication reset is executed Install the CUCM Publisher Gather a bootable image of the appropriate version, and perform an install with an upgrade to the appropriate version. It is more like a push model than a pull model. The publisher establishes a connection to every server in the cluster and the subscribers establish a connection the local database and the publisher only. Customers Also Viewed These Support Documents. Restart the following services from the CLI of the publisher If the Cisco Database Replicator (CDR) list is empty for some Learn more about how Cisco is using Inclusive Language. This state is rarely seen in versions 6.x and 7.x; in version 5.x, it indicates that the setup is still in progress. As shown in this image, the Unified To verify the database replication, run the utils dbreplication runtimestate command fromtheCLI of the publisher node, as shown in this image. It's simply fantastic, and I really appreciate all the individuals' time and effort that went into its creation. Database replication commands must be run from the publisher. of the node using the utils service list command. The replication timeout is based on the number of nodes in the (3) Execute the utils dbreplication runtimestate command on the Publisher and Subscriber. Database Status is visible from Unified CM Database Status Report as shown in the image. Thanks for creating this Patrick. After all subscribers have been defined we then wait the repltimeout (Can check from show tech repltimeout) it will then do a broadcast file that actually pushes the replicates across. This error is caused when one or more nodes in the cluster have Overall replication setup time is improved, although It still comes into play during a node down and upgrade scenarios when node reboots are spread out over time. ensure they areauthenticated. Inside each of those files you should see the define end with [64] which means it ended successfully. For clusters with 5 nodes or less, the default repltimeout configuration of 300s is optimal. 2. Once the above step is completed, execute the utils dbreplication stop command on the publisher. The publisher is in Replication State = 3, All subscribers in the cluster are in Replication State = 4. the utils networkconnectivity command on all the nodes to check the Love it!!! Same as above, but may need to be used in cases where above command fails. Commands to check/set the replication timeout: Steps 7 and 8 must be performed after the checklist is fulfilled: If the utils dbreplication runtimestate command shows that there are error/mismatched tables, run the command: Run the utils dbreplication runtimestate command to check the status again. message, check your network forany retransmissions or block the for the CUCM. https://supportforums.cisco.com/t5/collaboration-voice-and-video/rtmt/ba-p/3102764. It checks all the components and returns passed/failed value. order to avoid any databasereplication issues. Customers Also Viewed These Support Documents, https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/200396-Steps-to-Troubleshoot-Database-Replicati.html. The output from the publisher contains processnode table entries. Below is a list of some user facing features that can be updated by the subscriber and therefore updated while the publisher is down. Minutes.Commands to check/set the replication timeout: show tech repltimeout ( To check the current replication timeout than 5 or else it will deem it unreliable. If the broadcast sync is not updated with a recent date, run the Communications Manager 5.x has a similar replication topology to Callmanager 4.X. Repair all/selective the tables for database In case of an error, check for the network connectivity between option from the Navigationdrop-down list in the Cisco Unified After you run the command, all the tables are checked for consistency and an accurate replication status is displayed. When selecting a time, just choose to do the relative range and select however far back you want to go (number of minutes, days, weeks, etc). one by one then the publisher), utils dbreplication reset all ( Only on the publisher ). Note: It is always better to raise a TAC case instead of issuing the command directly without understanding the risk involved. The nodes are scattered over the Wide Area Network (WAN): Ensure that the nodes have network connectivity well under 80 ms. Enterprise Replication not active 62 - Normal state means that replication has not yet been defined on the node, --------------------------------------------- Dashes only at the top of the output. Replication is in the process of setting up. Each subscriber must reach Publisher and other subscribers included in the cluster network connectivity result must be completed successfully. Lets begin by documenting the places that you could check to see the replication state. Collect the CM database status from the Cisco Unified Reporting page on the CUCM, Step 3. Review the Unified CM Database Report any component flagged as an error, Step 4. g_# with the number being the node id. database replicationStep 8. "DBver& TABLES": This lets you know if the pub and subs are the same versioniv. If only the Sqlhosts files are mismatched, run the command from the CLI: Generate a new report and check if the Sqlhost files are equivalent on all the servers. If no, contact If you receive Cannot send TCP/UDP packets as an error message, check your network for any retransmissions or block the TCP/UDP ports. Once that command is COMPLETED, outputs can be verified and it shows the current database status. Split Brain Resolution and some Drops of the Server . Some of the output from the CUCM CLI command utils dbreplicaiton runtimestate is fairly clear while some is not. Navigate to System Reports and click Unified CM Database Status as shown in this image. This mismatched data is found by issuing a. Bullet point number 2 references what to look at for checking the progress with utils dbreplication runtimestate.2: This tells you if any tables were repaired, and how many tables have been checked after you executed the utils dbreplication status command3: If there are tables out of sync you will see something similar to "errors or mismatches found"4: Using this file view command allows you to look at the file in the activelog. The show network clustercommand checks for authentication of all nodes. state for more than an hour. Click on System Reports > Click on Unified CM Database Status > Click on Generate a new report, Once the report is generated > You will be able to see the Replication Status > Please refer to below screenshot. Ensure that both servers are RPC reachable column = YES). In order to determine whether your database replication is Generate a new report that uses the Generate New Report option or click the Generate New Report icon as shown in this image. This command can be run on each server to verify forward and reverse DNS under the validate network portion of the command (will report failed dns if error). Select Generate a new report. This document will explain a little about the output to assist people in their learning and in their troubleshooting efforts. 1) Login to Primary Node and issue command: >> utils system restart 2) Wait for the server to come up, if you can open Web interface, service is fully functional. Perform the procedure in the off business hours. Refer to this link in order to change IP address to the Hostname for the CUCM. Upon completion, proceed to the next step. Proceed to Step 8, if the status does not change. New here? No replication is occurring in this state. However, all of the nodes must be authenticated (ensure that the security password is same on all of the nodes). Cluster Manager populates this file and is used for local name resolution. In versions 6.x and 7.x, all servers could show state 3 even if performance, but consumesadditional system resources. Your email address will not be published. Based on the version of CUCM in use you may see the following: i. Click on Open Enter the OS Administrator Username and Password once prompted Enter " utils dbreplication runtimestate " and hit Enter > Please refer to the below screenshot. After you complete Step 1, select the Cisco Unified Reporting In UCCX, the 'utils dbreplication runtimestate' command may show "Errors or Mismatches Were Found!! Ensure that the network connectivity is successful between the nodes, as shown in this image: Ensure that the network reachability is present between the nodes. 7: This is the ping time between the servers. Once an accurate replication status is displayed, check the If the status of the node is unauthenticated, ensure that the network connectivity and the security password is same on all the nodes, as shown in this image. After you complete Step 4, if there are no issues reported, run DBver& REPL. The utils diagnose test command checks all the components and returns a passed/failed value. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. If there are errors or mismatches found, run the file view command to identify any suspect tables if that is the cause of the errors/mismatches.5: This is the database version. further to troubleshoot. Reporting pageon the CUCM. Generate a new report and check if the Rhost files are on the network. NOTE: THESE COMMANDS SHOULD BE RUN FROM THE PUBLISHER. Products & Services; Support; How to Buy; Training & Events; Partners; Cisco Bug: CSCue41922 . returns a passed/failed value.The components that are essential for hello is successful, asshown in this image. As illustrated in the figure below, only the publisher's database is writable while each subscriber contains a read only database. Error, Intra-cluster communication is broken, as shown in this image. 3.863 Yes (8) Connected 0 match Yes (2) Setup Completed. Ensure Replication Server List (cdr list serv) is populated for No replication occurs in this state. The validate_network Below is the list and then an excerpt from the cdr_broadcast log (Broadcast shown in Yellow Box). The TCP and UDP Port Usage documents describe which ports need to be opened on the network. the proper functioning of the database replication are: The validate_network command checks all aspects of the network Ensure that the Database Layer Remote Procedural Call (DBL RPC) This section describes scenarios in which database replication 03-16-2019 T. Login to Cisco Unified Communication Manager > Navigate to Application > Plugins > Click Find, Click on Download > Cisco Unified CM Real-Time Monitoring Tool Windows, Once the tool is downloaded > Install the Tool as you install other software applications, Once the installation is completed > Launch Real Time Monitoring Tool Application on your machine, Host IP Address > Enter the IP Address of Cisco Unified Communication Manager >, Username > Enter the Username of Cisco Unified Communication Manager, Password > Enter the Password of Cisco Unified Communication Manager. Cluster : Server 1-5 * 1 min = 5 min, + 6-10 * 2 min = 10 min, Complete these steps in order to check NTP status: Use the utils diagnose test command to check the output, as To check all tables run. This state is rarely seen in versions 6.x and 7.x; in versi. network. It is important to understand that the database replication is a network intensive task as it pushes the actual tables to all the nodes in the cluster. Status as shown in this image. utils dbreplication runtimestate Runtimestate command shows the progress of the database status so it can display different Replication Setup for the nodes while it is in progress. timeout ). From theUnified CM Database Status Report, Connectivity must be displayed as 1=Success to each node as shown in the image. up. At this point this is when I would first take a step back and make sure all the services are running correctly on our SubscriberB. Repair all/selective tables for database replication, Step 8. Proceed to Step 8, if the status does not change. The common error messages as seen in the network connectivity tests: 1. Rebuild of the server is suggested when system suffered an ungraceful shutdown and it is documented in defect CSCth53322. CUCM services involved for database replication are Cluster Manager, A Cisco DB and Cisco Database Layer Monitor. Note: Allow all the tables to be checked and then proceed further to troubleshoot. value ), utils dbreplication setrepltimeout ( To set the replication The documentation on checking connectivity is linked below. There are 5 states. You also have the option to opt-out of these cookies. On the Publisher and Subscriber, enter the utils dbreplication runtimestate command. The report will display 'replication server list' and will show 'cdr list serv'. Servers here should have the correct hostname and node id (populated from the process node table). Verify database replication is broken, Step 2. Below is the /etc/hosts as displayed Verified in Unified Reporting. .tar file using a SFTPserver. 0 - Replication Not Started. 0.036 Yes (2) Connected 0 match Yes (2) PUB Setup CompletedSUB01DC 10.x.x.x. equivalent on all the servers. Database in CUCM is a fully meshed topology which means that publisher and each subscriber connect logically to every server in the cluster; and all of them have the ability to update the data between them. If the DNS does not functions correctly, it can cause the If the RTT is unusually high, check network performance. If yes, go toStep 8. stateother than 2, continue to troubleshoot. I choose to ask for the Database Status report as the customer is in a version that has this available. This enables multithreading and improves replication setup time at the slight cost of processing power. You could probably pull the following and see if you find anything. Database replication can be damaged due to ungraceful shutdowns and they are visible in System-history log. Consult the Cisco TAC before proceeding with Step 7 and 8 in If only Refer to the sequence to reset the database replication for a particular node: In case you reach Cisco TAC for further assistance, ensure that these outputs and the reports are provided: For further information refer to the links: Understanding the output of utils dbreplication runtimestate for CUCM, Troubleshooting CUCM Database Replication Linux Appliance Model. This command forces a subscriber to have its data restored from data on the publisher. PING REPLICATION REPL. node. 03-19-2019 One thing I would like to know is after nodes complete replication how often do they replicate there after? If any node has a state other than 2, continue to troubleshoot. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! However, you can verifywhether the DNS is configured and Refer to the sequence to reset the database replication for a It is extremely important for the NTP to be fully functional in order to avoid any database replication issues. You must check the status for every node. I have Question, If the .rhost file is deleted/corrputed, is there a way to recreate it? a network connectivity problem.Ensure that all the nodes have ping Saved me hours of extra work. A list of hostnames which are trusted to make database connections. The documentation set for this product strives to use bias-free language. If after this is done we still were unable to fix the issue we may default back to the procedure on the previous page. nd check if the mismatch is cleared. Cisco TAC. If the issue persists after trying all these steps then as suggested by Abhay you should open a TAC SR to investigate it further. Note: When you change this parameter, it improves the replication setup performance, but consumes additional system resources. that the nodes havenetwork connecitivty well under 80 ms. It is important to understand that the database replication is a Repair all/selective the tables for This error is caused when one or more nodes in the cluster have a network connectivity problem. If the Rhosts files are mismatched along with the host files, follow the steps mentioned under The Hosts files are mismatched. Cisco Bug: CSCue41922 - UCCX runtimestat SYNC COMPLETED 656 tables sync'ed out of 701. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! In This should show corresponding defines for each subscriber in the cluster. 3. parameter to a higher value as shown. IntroductionSteps to Diagnose the Database ReplicationStep 1. - edited flagged with a red cross icon, asshown in this image. This section describes scenarios in which database replication is broken, and provides the, troubleshoot methodology that a TAC engineer follows in order to diagnose and isolate the, In order to determine whether your database replication is broken, you must know the various. 1: This lets you know the last action performed and the time of the action. DBver& REPL. On the Publisher, enter the utils dbreplication stop command. that the publisher waits for all the subscribers in order tosend If DNS is configured on a particular server it is required for both forward and reverse DNS to resolve correctly. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Verify if the A CiscoDB service is running from the CLI Ensure the Local and the Publisher databases are accessible. It is mandatory to procure user consent prior to running these cookies on your website. This change in topology overcomes previous limitations in replication architecture, as changes can now be made to local subscriber databases for user facing faetures even while the publisher is inaccessible. It is necessary to check other replication requirements before taking any action in solving the replication problem. Being in this state for a period longer than an hour could indicate a failure in setup. You can follow all the T-shooting links provided by Manish and I. Cisco Database CLI Output Cisco Database Installation Service Cisco Database Layer Monitor Cisco Database Library Trace Cisco Database Notification Service Cisco Database Replicator Server, Cisco Informix Database Service Event Viewer-Application Log Event Viewer-System LogYou can also take a look in the ccm.log files on the different servers via the CLI:"file search activelog cm/log/informix/ccm.log error""file search activelog cm/log/informix/ccm.log fail". image. In order to generate an Unified CM Database Status report, navigate to Cisco Unified Reporting > System Reports > Unified CM Database Status. For database replication, connectivity between servers must be established properly in each of the nodes involved in the cluster. Connecting i. Queue: Blank ii. (ID) & STATUS QUEUE TABLES LOOP? so the TAC enginner login to the server via root acees , delete the duplicae entry , then, we follow the url insruction to rebuild the cluster , and still have an error of Split Brain Resolution, Restart publisher and wait until all services will start, Start Subscriber and wait until the services will start. This is very helpful information. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Thanks for the quick response. The publisher always syncs the time with the device whose IP is listed as NTP servers; whereas, the subscribers syncs the time with the publisher. Thanks for taking the time to put it together. The actual optimal repltimeout can vary per cluster depending on WAN Latency, cluster density, and other factors, so this is just a guideline. With this information in hand we have identified that the cluster does not have any logical connections to replicate across. New here? reachability. If any errors/mismatches are discovered, theyare shown These cookies do not store any personal information. Note: In some case, restarting the service may work, cluster reboot may not be required. Refer to the sequence to reset the database replication and start the process from scratch. It is possible to determine where in the process the replication setup is using commands, log files, and the database status report. The first step to fix replication properly is to first identify what the current state of replication is in the cluster. Recommended to set to 40 for large clusters (10+ nodes). CUCM Database Replication is an area in which Cisco customers and partners have asked for more in-depth training in being able to properly assess a replication problem and potentially resolve an issue without involving TAC. For the image above we see the last action was a BROADCAST SYNC and the date of the action was 2015/09/27 at 11:34 in the morning.

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