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This is the latest documentation for BMC Helix Network Management (formerly known as Netreo).

 

FAQ

 

Security

14 Articles in this category

 

How much traffic will Netreo add to my network?

How much traffic Netreo will add to your network depends on a lot of factors, primarily because basic SNMP monitoring is going to have a different load profile than a configuration with a large amount of NetFlow traffic or IP telephony call reco...

Updated on : 09 Jan 2023

Why does the MAX value in the legend not show up in the graph?

A common question our customers ask is something similar to “Why does the text on the bottom of the graph have a ‘Max Blocks written’ value of 81.023K, yet the Y-axis of the graph only goes to 40K”? The shortest (and easiest) explanation is th...

Updated on : 09 Jan 2023

Why does the Y-axis on some graphs not start at zero?

Sometimes Netreo needs to display data in a graph where the full range of data values displayed never approach the zero or max. values of the graph. To avoid compressing the (vertical) display of such data (which could blunt the appearance of impo...

Updated on : 09 Jan 2023

Monitoring VMs that use recycled IP addresses

When performing auto-discovery of network resources to monitor (hardware devices, virtual machines, cloud resources, etc.), Netreo relies heavily on the IP addresses used by those resources. If, while scanning the network, an unknown IP address is...

Updated on : 08 Jan 2024

What does it mean when Netreo shows that a device poll time is “slow?”

Netreo uses an adaptive polling system to manage devices that may be responding slowly, so that they do not interfere with data collection on devices that are responding normally. This feature was introduced in version 7.2. When the polling proce...

Updated on : 09 Jan 2023

Can a URL be monitored without specifying a device?

Yes. A URL can be monitored without specifying a device using a WebART Check .

Updated on : 20 Sep 2023

How do I monitor a cluster of Windows Servers?

This can be confusing, because it is not a very straightforward situation. First let's get a high-level overview of how the clusters work. Usually there are two or more physical servers. Each running the cluster service and logically, if not phys...

Updated on : 09 Jan 2023

Why is there a notification delay after an alarm recovers?

Version 9 changed the behavior of some alarm notifications when it introduced the new incident management system. Now, when an alarm is no longer critical, rather than immediately returning to an OK state (and sending the related notifications), i...

Updated on : 09 Jan 2023

Does Netreo's Looking Glass feature support non-Cisco network devices?

Yes. Any manufacturer with a working SSH or telnet interface is already supported, although there are no prebuilt commands for them. The Looking Glass Administration page ( Administration > Tools > Looking Glass ) allows you to add custom ...

Updated on : 09 Jan 2023

Netreo says my Cisco device configuration is not saved, but it is. What’s happening?

In certain cases, Cisco configurations may show as “Changed but not saved!” even though they have been saved, or not changed in a long time. This is caused by a quirk in the way Cisco counts time. Netreo uses SNMP to check configuration “save sta...

Updated on : 09 Jan 2023

Why does the last reboot time for a device listed in Netreo show a different time than the device itself does?

Netreo measures the last reboot time for a system by collecting data from the system.sysUptime MIB in MIB-2. This is an industry standard and a widely supported method. The variable collected is defined as “The time (in hundredths of a second) si...

Updated on : 09 Jul 2025

How do I use WMI management through a firewall?

Netreo monitors Windows using the WMI protocol, and sometimes SNMP on very old versions. The ports that will need to be opened across the firewall are the same as those required for any WMI access to Windows, namely TCP/135 and all high ports (1024...

Updated on : 19 Jul 2023

When using WMI, do I have to give administrator privileges to the user account?

Not strictly speaking. Although it is highly recommended  to use a dedicated service account  for the purposes of WMI management when monitoring Windows servers. While a Domain Administrator account is the easiest to use, it is ...

Updated on : 11 Jan 2023

When monitoring Windows services I get a “WMI Generic failure” or “ERROR Login to remote object” message. What’s wrong?

Using Service Accounts Netreo requires a dedicated service account for use with WMI/WinRM monitoring that is not shared with any other management application in order to prevent the error described here. The error messages “ERROR: Login to remot...

Updated on : 11 Jan 2023

How is device latency determined in Netreo?

To determine the latency between the Netreo server and a device, Netreo send a series of six pings from its appliance address to the primary address of the device and averages the result. The first ping is used to “prime” the network path by popu...

Updated on : 09 Jan 2023

Why does Netreo sometimes show over 100 percent utilization on some interfaces?

Netreo detects interface bandwidth speed using SNMP. Specifically, it reads the ifSpeed and ifHighSpeed MIBs. First, Netreo checks the ifSpeed MIB. If it responds with a proper speed value, then that value is reported in the user interface. If it ...

Updated on : 09 Sep 2024

What is the "blackhole" action group used for?

Netreo uses the concept of a “black hole” for routing messages that aren’t supposed to go anywhere, something known as an “email black hole” (thus the name). It can be thought of as a placeholder for “none,” since in early releases of Netreo it w...

Updated on : 09 Jan 2023

Why am I getting a zlib1.dll error when trying to deploy an on-premise virtual instance of Netreo?

Sometimes attempts to deploy the Netreo OVA file using vSphere result in the following error:  This error message is the result of a known bug in the VMware vSphere 5 client application. More information about the bug can be found in this ...

Updated on : 19 Jul 2023

Which web browsers are compatible with Netreo?

The user interface in Netreo is designed for most modern web browsers, but utilizes some newer features of those browsers to deliver a richer user experience. As a result, some customers using older-version browsers may experience some issues when...

Updated on : 09 Jan 2023

Why are email alerts formatted strangely in Outlook 2010?

There is a setting in Outlook 2010 that removes extra carriage returns from email messages. This can cause alert and recovery emails to be mangled together and illegible. To find more information on this issue take a look at the following Microsof...

Updated on : 19 Jul 2023

Netreo to BMC Helix SaaS Migration

The following FAQ is to assist Netreo SaaS customers during the migration of their Netreo deployment to the BMC Helix data center (DC). What is the nature of this migration? Answer - BMC Helix is migrating all Netreo SaaS customers to its data...

Updated on : 12 Aug 2025

 

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BMC Helix Network Management