# Knowledge Base | ManageEngine OpUtils

## OpUtils - Knowledge Base

This section provides you with the common hiccups that you might encounter with OpUtils along with their possible reasons. Contact [Technical Support](mailto:oputils-support@manageengine.com) with the Logs for assistance.

### Installation & Startup

1. [I am not able to get OpUtils installed on a Windows Machine. It fails to unpack the jars and the installation quits.](https://www.manageengine.com/products/oputils/installation-startup-knowledge-base.html#startup-installation-kbase1)
2. [How do I install OpUtils as a service in Linux OS?](https://www.manageengine.com/products/oputils/installation-startup-knowledge-base.html#startup-installation-kbase9)
3. [I do not want OpUtils start along with the system. What should I do?](https://www.manageengine.com/products/oputils/installation-startup-knowledge-base.html#startup-installation-kbase2)
4. [Whenever I start OpUtils, the browser opens to launch the client? Is there a way I can disable this?](https://www.manageengine.com/products/oputils/installation-startup-knowledge-base.html#startup-installation-kbase3)
5. [After logging into the OpUtils client, clicking any links or tabs from the welcome screen takes me back to the login page. Why?](https://www.manageengine.com/products/oputils/installation-startup-knowledge-base.html#startup-installation-kbase4)
6. [When I run OpUtils in a Linux machine, I get an error as "Problem while Starting Server !! System halted". What should I do to resolve this?](https://www.manageengine.com/products/oputils/installation-startup-knowledge-base.html#startup-installation-kbase5)
7. [I am not able to run OpUtils in Windows Vista?](https://www.manageengine.com/products/oputils/installation-startup-knowledge-base.html#startup-installation-kbase6)
8. [Is it possible to move the installation to a new machine with the configurations and data intact?](https://www.manageengine.com/products/oputils/installation-startup-knowledge-base.html#startup-installation-kbase7)
9. [Is it possible to use OpUtils to monitor my devices in WAN?](https://www.manageengine.com/products/oputils/installation-startup-knowledge-base.html#startup-installation-kbase8)
10. [When I apply the license, it throws an error.](https://www.manageengine.com/products/oputils/installation-startup-knowledge-base.html#startup-installation-kbase10)
11. [How to upgrade OpUtils using command line options?](https://www.manageengine.com/products/oputils/install-sp-command-line.html)
12. [How can I make Oputils use a specific IP Address?](https://www.manageengine.com/products/oputils/binding-to-one-ip.html)
13. [What are the ports that are required to be opened on the firewall for managing devices across WAN?](https://www.manageengine.com/products/oputils/oputils-ports-used.html)

### Switch Port Mapper

1. [Error on Adding a Switch - Not a Switch](https://www.manageengine.com/products/oputils/adding-switch-fails.html)
2. [Failed to Add a Router - Not a Router](https://www.manageengine.com/products/oputils/add-router-failure.html)
3. [Failed to Add a Router - Unable to Connect](https://www.manageengine.com/products/oputils/add-router-cli-failure.html)
4. [Switch Port Mapper does not show any MAC Addresses.](https://www.manageengine.com/products/oputils/swicth-port-mapper-knowledge-base.html#switch-port-mapper-kbase1)
5. [Switch Port Mapper displays only the MAC Address and not the IP Address.](https://www.manageengine.com/products/oputils/swicth-port-mapper-knowledge-base.html#switch-port-mapper-kbase2)
6. [I did a 'Switch Port Mapping' using the Switch Port Mapper tools in OpUtils. In the results, I can see several devices connected to a single switch port? How is this possible?](https://www.manageengine.com/products/oputils/swicth-port-mapper-knowledge-base.html#switch-port-mapper-kbase3)
7. [I imported several switches from a CSV file. I get a message that scanning failed for xx switches. What should I do?](https://www.manageengine.com/products/oputils/swicth-port-mapper-knowledge-base.html#switch-port-mapper-kbase4)
8. [I have different router for each VLAN. How can I add to configure it ?](https://www.manageengine.com/products/oputils/swicth-port-mapper-knowledge-base.html#switch-port-mapper-kbase5)
9. [Switch Port Mapper do not show all the ports of the switch?](https://www.manageengine.com/products/oputils/swicth-port-mapper-knowledge-base.html#switch-port-mapper-kbase6)
10. [Why are CISCO SNMPv3 switches not showing mac addresses?](https://www.manageengine.com/products/oputils/mac-address-mapping-not-working.html#switch-port-mapper-kbase7)

### Bandwidth Monitor

1. [Bandwidth Monitor does not show any utilization information.](https://www.manageengine.com/products/oputils/bandwidth-monitor-knowledge-base.html#bandwidth-monitor-kbase1)
2. [The interface speed shown in the Bandwidth Monitor tool is incorrect? Is there a way I can change this manually?](https://www.manageengine.com/products/oputils/bandwidth-monitor-knowledge-base.html#bandwidth-monitor-kbase2)
3. [What is the significance of the SNMP version shown while adding an interface? Do I need to change it?](https://www.manageengine.com/products/oputils/bandwidth-monitor-knowledge-base.html#bandwidth-monitor-kbase3)

### Cisco Tools

1. [Error on Adding a Device - Not a Cisco Device](https://www.manageengine.com/products/oputils/cisco-device-failure.html)
2. [Unable to Bind to Port 69](https://www.manageengine.com/products/oputils/tftp-server-port-binding-failure.html)
3. [Failed to Add a Router - Not a Router](https://www.manageengine.com/products/oputils/add-router-failure.html)
4. [Failed to Add a Router - Unable to Connect](https://www.manageengine.com/products/oputils/add-router-cli-failure.html)
5. [In the Config File Manager tool, I am not getting the Startup Config file. It says "Cisco Config Copy MIB" is not supported?](https://www.manageengine.com/products/oputils/cisco-tools-knowledge-base.html#cisco-tools-kbase1)
6. [Why do I get the error "E5003: Unable to bind to Port -69" in Config File Manager?](https://www.manageengine.com/products/oputils/cisco-tools-knowledge-base.html#cisco-tools-kbase2)
7. [I tried to retrieve a config file from a Cisco device. But, when I click to view the config files, it is blank.](https://www.manageengine.com/products/oputils/cisco-tools-knowledge-base.html#cisco-tools-kbase3)
8. [When I try to get the Access Lists, I get an error as "E4002: Wrong CLI authentication parameters". How do I fix this?](https://www.manageengine.com/products/oputils/cisco-tools-knowledge-base.html#cisco-tools-kbase4)
9. [How to enable SNMP in Cisco Routers and Switches?](https://www.manageengine.com/products/oputils/enable-snmp-cisco-router.html)
10. [I get an error as "Error Retrieving Config File" during both scheduled and manual operations. What could be the problem?](https://www.manageengine.com/products/oputils/cisco-tools-knowledge-base.html#cisco-tools-kbase5)

### Rogue Detection

1. [Failed to Add a Router - Not a Router](https://www.manageengine.com/products/oputils/add-router-failure.html)
2. [Failed to Add a Router - Unable to Connect](https://www.manageengine.com/products/oputils/add-router-cli-failure.html)
3. [I am not seeing the data in the Rogue Detection. Why ?](https://www.manageengine.com/products/oputils/rogue-detection-knowledge-base.html#rogue-detection-kbase1)
4. [The Rogue Detection tool shows the newly discovered devices, but do not show the Switch details of the discovered device?](https://www.manageengine.com/products/oputils/rogue-detection-knowledge-base.html#rogue-detection-kbase2)
5. [I have marked few devices as Rogue. It is not getting rediscovered. Why?](https://www.manageengine.com/products/oputils/rogue-detection-knowledge-base.html#rogue-detection-kbase3)
6. [Rogue Device Alert comes only with the MAC Address and not the IP Address. Why?](https://www.manageengine.com/products/oputils/rogue-detection-knowledge-base.html#rogue-detection-kbase4)

### IP Address Manager

1. [When I access the IP Address Manager, it takes a long time to load.](https://www.manageengine.com/products/oputils/ip-address-manager-knowledge-base.html#ip-address-manager-kbase1)
2. [The details like the sysname, location, contact etc., are not available for all the IP Addresses.](https://www.manageengine.com/products/oputils/ip-address-manager-knowledge-base.html#ip-address-manager-kbase2)
3. [Failed to add a domain - Domain Controller Not Reachable](https://www.manageengine.com/products/oputils/domain-controller-not-reachable.html)
4. [Failed to add a domain - Invalid Username or Password](https://www.manageengine.com/products/oputils/error-adding-domain.html)
5. [Insufficient Privileges for WMI Queries](https://www.manageengine.com/products/oputils/insufficient-domain-privileges.html)
6. [Microsoft DHCP Server scan completed but not showing Scope, Leased IP details. Why?](https://www.manageengine.com/products/oputils/dhcp-scope-not-displayed.html)

### SNMP Tools

1. [Unable to Bind to Port](https://www.manageengine.com/products/oputils/snmp-trap-port-binding-failure.html)
2. [The Trap Receiver tool does not show any traps?](https://www.manageengine.com/products/oputils/snmp-tools-knowledge-base.html#snmp-tools-kbase1)
3. [I do not get the description of the Trap Varbinds in the Trap Receiver tool. Why?](https://www.manageengine.com/products/oputils/snmp-tools-knowledge-base.html#snmp-tools-kbase2)
4. [I am not able to GET the values in the MIB Browser; it says "Request Failed or Timed Out. No Error".](https://www.manageengine.com/products/oputils/snmp-tools-knowledge-base.html#snmp-tools-kbase3)

### Wake on LAN

1. [Wake on LAN does not boot all the machines.](https://www.manageengine.com/products/oputils/wake-on-lan-knowledge-base.html#wake-on-lan-kbase1)

### Miscellaneous

1. [What is SNMP Community?](https://www.manageengine.com/products/oputils/miscellaneous-knowledge-base.html#miscellaneous-kbase1)
2. [How to install/enable SNMP?](https://www.manageengine.com/products/oputils/miscellaneous-knowledge-base.html#miscellaneous-kbase2)
3. [No Response to SNMP Queries](https://www.manageengine.com/products/oputils/snmp-community-failure.html)
4. [Error on Adding a Device - Unreachable Host](https://www.manageengine.com/products/oputils/device-unreachable.html)
5. [Error on Adding a Device - Unknown Host](https://www.manageengine.com/products/oputils/unknown-host.html)
6. [Failed to Retrieve Data using SNMP - Specified OID Not Implemented](https://www.manageengine.com/products/oputils/mib-implementation-error.html)
7. [When I use the Send Email option, I get an error: "E6002 : Unable to send mail".](https://www.manageengine.com/products/oputils/miscellaneous-knowledge-base.html#miscellaneous-kbase3)
8. [How to restore the data from a database backup file?](https://www.manageengine.com/products/oputils/restoring-backed-up-database.html)