Network Monitoring

DAG Tech Network Monitoring Services

What is your first reaction on a network fault? A direct login to the device is not a recommended approach to start troubleshooting an alert. Providing an access to every team member for all the devices in the network has associated risks and is an option that does not scale in expanding teams. That said, you would like the team to be equipped with the required utilities that lets them quickly troubleshoot the network performance problems. Instant accesses to the network troubleshooting tools help isolate a fault quickly and embark on the actions needed to resolve a fault as early as possible.

Here is collection of DAG Tech’s network monitoring tools that helps perform the first and second level troubleshooting based on the nature of the network fault.

ICMP Ping

When you receive a ‘device down’ alert, the first condition that you might want to assess is if the device is reachable. From the device snapshot page in OpManager, do an instant ping and check for response. You can troubleshoot further using the other network monitoring tools if a ping to the device fails, or if the response time is very high.

Traceroute

When you troubleshoot a device down alert using Ping and the device fails to respond, you can Traceroute to determine if the device is not reachable because of a failure in the path. Trace the route from OpManager to the destination device, check the number of hops to the monitored device and spot the exact point of delay or outage. Again, this serves as a first level troubleshooting and based on the response, you can switch to other monitoring tools to drill down a fault.

Switch Port Mapper

This tool helps you see the port-wise connectivity of devices to the network switches which is necessary to help troubleshoot high traffic issues. The Switch Port Mapper is a network monitoring tool that gives you the MAC address, IP Address and DNS names of the devices connected to the switch.

Real Time Reports

When there is high system resource utilization, an instant check on the current resource performance helps in assessing how severe the performance impact is. An unattended resource crunch can lead to severe downtimes. Let’s assume you receive a threshold violation alert for memory utilization on a critical server. The first step would be to determine if it is a transient spike or it has been that way for some time. The administrator can instantly access and resolve them quickly.

Remote Process Diagnostics

This network monitoring tool is very specific to server performance monitoring. Use this tool to launch the list of Top 10 processes by CPU or Memory utilization from the device snapshot page. This option lets you terminate the offending process immediately and avert a server crash.

Syslog Viewer

The syslog viewer lets you view the syslog packets sent by the devices to the syslog server. This network tool helps an administrator find out if the monitored devices are correctly forwarding the messages to the configured syslog server. You can choose to monitor specific syslog messages by configuring syslog monitoring rules by filtering the rules that match specific criteria.

Telnet/SSH

Establish a CLI session with the Unix devices to troubleshoot quickly. You might want to execute some CLI commands on the device to check what is causing a high CPU utilization on the device and decide to terminate a process or kill a service to free-up the resource. This tool serves as a first and second level troubleshooting utility as it lets you act immediately on certain alerts using CLI commands.

From Wikipedia:

Network monitoring is the use of a system that constantly monitors a computer network for slow or failing components and that notifies the network administrator (via email, SMS or other alarms) in case of outages. It is part of network management.

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