TroubleShooting - Network Simulator

Unable to start SNMP Agent at Port : 8001 and at IpAddress : 121.111.50.2

Unable to start SNMP Agent at Port : 8001 and at IpAddress : 121.111.50.1

Unable to start Network Simulator !!!

The above error will occur in Network Simulator in any one of the following cases:

• The port may be occupied by some other application.

• There is a IP clash in the network. (i.e) the virtual IP configured in the simulator already exists in the network

• Product is installed in C:\Program Files . Actually this is a limitation of our product. Installation directory name should not have spaces.

You have to configure a unique virtual IP address so that the device can be associated with the IP address, check if the port is occupied, check if the product installation directory contains white spaces.

Problem with MySQL Server startup in Linux OS

In linux when the file./etc/my.cnf is present there will be problem in mysql server startup.

The specified file should be moved or renamed.

Database does not exist / Table does not exist

The above error will occur if the database is corrupted.

 ---

"Could not get registration info. The database XXX cannot be found"

 The above error will occur, if you have got connected to a wrong MySQL. That is, you would have got connected to a MySQL which does not have the simulated data

Make sure you connect to the MySQL where your simulated data resides.

If you have your MySQL running in a separate machine, make sure your simulated data resides there and that you are connecting only to that MySQL .

Device configuration corrupted

This could happen when you have accidentally deleted any of the system configuration files.

You will have to delete the corrupted file and recreate the device..

The virtual interfaces added in the server machine ( where simulator is running) is not accessible from the Manager machine ( where the manager application is running ).

This could happen if you are running the simulated network and the manager application in different machines.

To access the simulated network from the manager application running in a different system,  execute the following command in the system where the manager application is running :

In Linux/Solaris :

The following command has to be executed from the console as superuser.

Command Syntax :

 /sbin/route add -net <network address >  netmask 255.255.255.0 gw <manager machines IP Address>

For example :-

 /sbin/route add -net 190.191.192.0  netmask 255.255.255.0 gw 192.168.1.41

In Windows :

The following command has to be executed from the console as superuser.

Command Syntax :

route  add  <network address > mask 255.255.255.0 <manager machines IP Address>

For example :

route  add 190.191.192.0  mask 255.255.255.0 192.168.1.41

 "Too many open files in system"

The error log displays "Too many open files in system" error if the number of file descriptors set is not sufficient to start the required number of devices in the network. The command "ulimit -n" will display the file descriptors set on the system. .

Set the required number of file descriptors as specified in the topic "Simulating Large Networks -> Changing the system settings in Linux",  restart the system for the settings to take affect and then start  the network

Unable to download file through FTP/TFTP

1. Check if the ipaddress and port of the host (where TFTP Server is running), is correct.

2. Check if the sourcefile to be downloaded exists in the host.

3. Check if any Firewall has been configured who has blocked the FTP request..

Specify the correct values, if firewall is configured, disable the firewall and then send the request.