Creating Hierarchical Site Structure in Nectus

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Creating Hierarchical Site Structure in Nectus

In this chapter you’ll learn how to create a Hierarchical Site Structure in Nectus and populate it with Devices. This activity is fundamental to using Nectus.

Specifically, you will learn how to:

  • Create a New Site
  • Delete a Site
  • Move a Site
  • Add a Device to a Site
  • Delete a Device from a Site
  • Move a Device to a Different Site

Creating a New Site

Like everything in Nectus, creating a Site is fast and simple. Follow these instructions to get it done:

  1. In the Sites Panel on the Nectus Home screen, click Sites. The “All Sites” list appears. Right-click All Sites.

  1. In the menu that appears, click Create New Site Level.

  1. In the Create New Site Level dialog box that appears, enter the Site Level Name and any other information relevant to the Site you are creating.
  2. Click Ok to add the Site to your Nectus Hierarchical Site Structure.

Deleting a Site

Deleting an existing Site is even easier than creating a new one. Follow these steps:

  1. Click Sites in the Sites Panel on the Nectus Home Screen. The “All Sites” list appears.
  2. Open the All Sites list by clicking the plus sign ( + ) to the left of the list.
  3. Navigate to the Site you want to delete and right-click it.

  1. In the menu that appears, select Delete Current Site Level. A confirmation dialog box appears.

  1. Click Ok to delete the Site.

Moving a Site

You can move a Site to a new location in the existing hierarchy. This location can be at the same level in the hierarchy or at any other level. Any Site can be moved to any location within the hierarchy. Follow these instructions to move a Site:

  1. Click Sites in the Sites Panel on the Nectus Home Screen. Open the “All Sites” list and navigate to the Site you wish to move.
  2. Right-click the Site name.

  1. In the drop-down menu that appears, hover the cursor over the Move Current Site to… option. A list of all the top-level Sites in your hierarchy appears.
  2. Hover the cursor over a location in this list to see a list of any Sites under this location.
  3. Click a location to place your original Site under that location. Clicking All Sites in the hierarchy moves your Site to the top level.

Adding a Device to a Site

Here, we are assuming that you have already added your available Devices to the Unassigned Devices list. Follow these steps to add a Device to a Site by taking it from the Unassigned Devices pool:

  1. In the Sites Panel of the Nectus Home screen, click Sites. The “All Sites” list appears.
  2. Open the Unassigned Devices list by clicking the plus sign ( + ) to the left of the list.
  3. Right-click the Device you want to add to a Site.

  1. In the menu that appears, hover the cursor over the Move Device to… option. A list of all the available top-level Sites appears.
  2. Navigate through the Site hierarchy by hovering the cursor over Sites to view their sub-sites. Click the Site you want to add the Device to.
  3. The Device moves from the Unassigned Devices pool into the Site you selected.

Deleting a Device from a Site

Follow these steps to delete a Device from a Site by moving it back to the Unassigned Devices pool:

  1. In the Sites Panel on the Nectus Home screen, click Sites. The “All Sites” list appears.
  2. Open the All Sites list by clicking the plus sign ( + ) to the left of the list.
  3. Navigate to the Site that contains the Device you want to delete.
  4. Open the Site by clicking the plus sign ( + ) to the left of the list. The Device appears below the Site.
  5. Right-click the Device name. A menu appears.
  6. Hover the cursor over the Move Device to… option. A list of your top-level Sites appears.
  7. Select Unassigned Devices in the list to delete the device from the Site and return it to the Unassigned Devices pool.

Moving a Device to a Different Site

Moving a Device between Sites is very similar to deleting a device. Here are the steps:

  1. In the Sites Panel on the Nectus Home screen, click Sites. The “All Sites” list appears.
  2. Open the All Sites list by clicking the plus sign ( + ) to the left of the list.
  3. Navigate to the Site that contains the Device you want to delete.
  4. Open the Site by clicking the plus sign ( + ) to the left of the list. The Device appears below the Site.
  5. Right-click the Device name. A menu appears.
  6. Hover the cursor over the Move Device to… option. A list of your top-level Sites appears.
  7. Navigate through the hierarchy of Sites and click the Site you want to move the Device to.

 

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Editing Site Properties in Nectus

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Edit Site Properties

You can easily edit the properties of any existing Site. In this chapter, you’ll learn how to edit the properties of an existing Site. We’ll also discuss the functions of each editable property.

Opening the Edit Site Properties Dialog Box

It takes just a few clicks to open the Edit Site Properties dialog box for any existing Site. Follow these instructions:

  1. Click Sites in the Sites Panel on the Nectus Home Screen. The “All Sites” list appears.
  2. Open the All Sites list by clicking the plus sign ( + ) to the left of the list.
  3. Navigate to the Site you want to edit and right-click it.

  1. In the menu that appears, select Properties. The Edit Site Properties dialog box appears.

  1. Make your desired edits (details about each editable property follow). Click Ok when done.

Editable Properties

You can edit the following properties from the Edit Site Properties dialog box. Here is a complete explanation of each field:

  • Site Gateways Button: Opens the Site Gateways dialog box and displays all the potential gateway Devices for this Site.
  • Site Level Name: A unique identifier for the Site Level. You can assign any name you wish.
  • Site Specific Hostname Prefix: Setting a hostname prefix here will automatically assign to this Site any unassigned Devices with the same prefix. This feature is currently disabled.
  • Site Color: The color to use for Devices that are assigned to this Site. Click the colored block to select a color, or enter the ASCII color name.
  • Outage Map Icon: A clickable list of icons that can be used to identify this Site. The options are Circle, Triangle, or Star.
  • Outage Map Icon Size: Allows you to adjust the size of the icon that represents this Site. Typically used to make the icons for more important Sites larger.
  • Address: The street address of the Site. Can be used to generate the GPS Latitude and Longitude of the Site.
  • Find GPS from Address Button: When you click this button, Nectus uses Google Maps to find the GPS Latitude and Longitude of the Site.
  • GPS Latitude: The Latitude of the Site. You can enter a value manually, or let Nectus populate this field using the “Find GPS from Address” button.
  • GPS Longitude: The Longitude of the Site. You can enter a value manually, or let Nectus populate this field using the “Find GPS from Address” button.
  • Maintenance Window: Shows the time frame when Site administration is allowed. Click to select from a list of available maintenance windows. These windows are defined at Settings / General Settings / Scheduled Maintenance Settings.

 

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Aruba Wireless Dashboard added to Nectus 1.2.30

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Support for monitoring Aruba wireless controllers was added to most recent release of Nectus NMS.  It brings visibility to most loaded wireless APs, SSIDs and controllers.

It displays basic antenna info, current AP channels, gives list of rogue APs and rogue clients and allows generation of Wireless HeatMaps over floorplans.

 

 

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Cisco Wireless Dashboards

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After support for wireless devices was added in Nectus, specific monitoring dashboards were created to track any change that can affect the wireless users, controllers or access points.
The wireless dashboards are vendor specific and this is where you can find the dashboard for Cisco wireless devices:

The focus of this article is on Cisco wireless devices, this is how the Cisco wireless dashboard looks like:

Wireless dashboard has multiple sections.
One of the sections covers the controllers and can provide information about the CPU usage, how many APs are Up, Down or Downloading:

As always, you can get device details by selecting the controller:

The interesting things starts when you select the counters related to the number of APs that are up, down or in process of being associated with the controller.
You get a list of APs in that state associated with that specific controller:

To get details about an AP, it is enough to select one of the APs and a window with multiple tabs will provide various information that can help the operator to understand how that specific AP operates.
The first tab provides the name of AP assigned by the operator, the model of AP, the operating system, the IP address and some other useful information about the AP.

The next tab provides technical information about the two frequencies in which the AP operates:

In the next tab, quality of service settings are covered:

The forth tab is about the load in terms of number of clients, receive and transmit utilization for the frequencies supported:

The next tab shows the rogue APs detected:

You can also see the neighbor APs and some of their characteristics:

And the last tab shows the CDP neighbor:

Another section of the wireless dashboard is the SSID Client load which shows how many clients are on each SSID:

The wireless dashboard allows to see how many clients and on which frequency each AP has:

And the last section of the wireless dashboard is the one showing how many clients are on the two frequencies, 2.4Ghz and 5Ghz, in total and you can see some history of how many clients were at some point in time.

Nectus Cisco Wireless dashboard can provide useful information about the wireless devices, controllers and access points.

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Cisco Wireless client search and tracking tools

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In this post we will cover some new functionality added to Nectus in latest Wireless release.

The “Wireless Client Search” allows the operator to find any wireless client by its MAC, IP address or Username.

The client search is located under main menu “Tools”:

In the menu, you have an option to search for a client based on the MAC, IP or Username. You can also restrict the scope where the search will take place:

Here is how a result of a MAC search looks like. You can search using part of a MAC address as well, but you need to provide at least 3 characters (two numbers and “:” )

You can view the client details by clicking either on MAC address or IP address and the new window will show Client’s basic info like like SSID, RSSI etc.:

The second tab will show the RSSI from various APs that detects client’s signal:

If AP name is clicked, then you will get detailed information about the AP:

Next, you can search for an IP address (again, you do not have to specify full IP address):

The last option is to search using an username:

The username is shown in the client detailed information:

Coming back to the search window, there is the possibility to track a client. You actually track the MAC address of the client to see if and where the client roamed across the wireless network. One or more clients can be tracked in the same time:

You need to specify how often Nectus should check this MAC address and for how long. If you know the client goes on and off often or it moves around the wireless network, then you might want to use an aggressive timer for frequency to get accurate data about availability:

The list of the tracked clients can be seen here:

And the list is this:

A client can be added for tracking from this menu as well:

And here is how the tracking information looks like for a client:

This shows that the client did not move to another AP, so there was no or little movement of the client.

 

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Cisco Wireless Heat Maps

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In this post, we will cover the wireless heat maps and how they are created in Nectus.

A heat map will allow to visualize the state of the wireless coverage and help to take decision in order to improve the coverage.

Using the information from APs along with a map of physical location, you can find out where are the hot and cold spots.

A heat map is a L2 topology diagram where you can add access points and optionally the controller to which the access points are associated with.

You can add the controller and the APs from the list of controllers:

If the controller and several APs are added to the topology, it will look like this:

In the topology toolbar settings option, you must check the option to see access points in the topology:

Afterwards, the topology looks like this:

You can see which channel is used on each AP and how many clients are connected to each AP.

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Ruckus Wireless Antenna info SNMP OID

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Ruckus “Antenna Info” SNMP OIDs
===========================

Antenna Type (0 = 802.11bg, 1 = 802.11a, 2 = 802.11ng, 3 = 802.11na, 4 = 802.11ac)

‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.3.[6.108.170.179.26.66.144].[0]’ => “2”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.3.[6.108.170.179.26.66.144].[1]’ => “3”

Antenna Gain (dB)
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.44.[6.108.170.179.26.66.144].[0]’ => “7”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.44.[6.108.170.179.26.66.144].[1]’ => “7”

Tx Power Level (0 = Full, 1 = Half, 2 = Quarter, 3 = Eighth)
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.5.[6.108.170.179.26.66.144].[0]’ => “0”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.5.[6.108.170.179.26.66.144].[1]’ => “0”

Channel Number
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.4.[6.108.170.179.26.66.144].[0]’ => “1”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.4.[6.108.170.179.26.66.144].[1]’ => “36”

Number Of Current Users
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.8.[6.108.170.179.26.66.144].[0]’ => “0”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.8.[6.108.170.179.26.66.144].[1]’ => “0”

Utilization (%)
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.40.[6.108.170.179.26.66.144].[0]’ => “0”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.40.[6.108.170.179.26.66.144].[1]’ => “0”

Average Client RSSI (dBm)
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.9.[6.108.170.179.26.66.144].[0]’ => “0”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.9.[6.108.170.179.26.66.144].[1]’ => “0”

Antenna MAC Address
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.1.[6.108.170.179.26.66.144].[0]’ => “lª³B”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.1.[6.108.170.179.26.66.144].[1]’ => “lª³B”

Antenna Mesh Enabled (1 – Yes, 2 = No)
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.6.[6.108.170.179.26.66.144].[0]’ => “2”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.6.[6.108.170.179.26.66.144].[1]’ => “2”

Power Management Enabled (1 = Yes, 0 = No)
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.18.[6.108.170.179.26.66.144].[0]’ => “1”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.18.[6.108.170.179.26.66.144].[1]’ => “1”

Max. Number of Clients Allowed
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.19.[6.108.170.179.26.66.144].[0]’ => “256”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.19.[6.108.170.179.26.66.144].[1]’ => “256”

Antenna Rx Packets
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.10.[6.108.170.179.26.66.144].[0]’ => “1047794”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.10.[6.108.170.179.26.66.144].[1]’ => “5447”

Antenna Rx Bytes
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.11.[6.108.170.179.26.66.144].[0]’ => “223745214”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.11.[6.108.170.179.26.66.144].[1]’ => “1050697”

Antenna Tx Packets
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.13.[6.108.170.179.26.66.144].[0]’ => “42252”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.13.[6.108.170.179.26.66.144].[1]’ => “6080”

Antenna Tx Bytes
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.14.[6.108.170.179.26.66.144].[0]’ => “8941040”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.14.[6.108.170.179.26.66.144].[1]’ => “921628”

Number of Tx Fails
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.16.[6.108.170.179.26.66.144].[0]’ => “0”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.16.[6.108.170.179.26.66.144].[1]’ => “0”

Number of Tx Retries
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.17.[6.108.170.179.26.66.144].[0]’ => “2875”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.17.[6.108.170.179.26.66.144].[1]’ => “8”

Authentication Requests
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.25.[6.108.170.179.26.66.144].[0]’ => “1”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.25.[6.108.170.179.26.66.144].[1]’ => “0”

Authentication Responses
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.26.[6.108.170.179.26.66.144].[0]’ => “1”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.26.[6.108.170.179.26.66.144].[1]’ => “0”

Authentication Success
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.27.[6.108.170.179.26.66.144].[0]’ => “1”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.27.[6.108.170.179.26.66.144].[1]’ => “0”

Authentication Failed
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.28.[6.108.170.179.26.66.144].[0]’ => “0”
‘1.3.6.1.4.1.25053.1.2.2.1.1.2.2.1.28.[6.108.170.179.26.66.144].[1]’ => “0”

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Support for Ruckus Wireless Controllers added to Nectus

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Support for  Ruckus Wireless Controllers was added to Nectus.

AP Name:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.2

AP Name:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.2

AP Model:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.4

Operation Status: 1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.3   (0 = Down, 1 = Up,  2,3,4 = Prep)

Connected Clients:      1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.15

Coverage: 1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.59  (1 = Indoor, 2 = Indoor-Distribute, 3 = Outdoor)

Connection mode:      1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.17  (0 = Layer2, 1 = Layer3)

Serial Number:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.5

Software Version:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.7

HW Version:          1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.8

Uptime:              1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.6

CPU Utilization:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.29

MAC Address:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.1

IP Address:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.10

Mask:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.100

Gateway:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.101

DNS Server 1:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.105

DNS Server 2:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.106

Max Number of Clients:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.110

Rogue Clients:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.16

Wireless Bytes Rx:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.61

Wireless Bytes Tx:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.62

LAN Bytes Rx:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.21

LAN Bytes Tx:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.25

LAN Drops:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.53

LAN Flaps:    1.3.6.1.4.1.25053.1.2.2.1.1.2.1.1.39

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Wireless Heat Map Vizualization added to Nectus starting from build 1.2.24

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Nectus goes wireless. Starting from version 1.2.24  we added support for Cisco Wireless.

Powerful dashboards and RSSI heatmaps now available to all Nectus customers.    Download your copy of Nectus

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Working with SNMP Traps in Nectus NMS

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One of the key features of Nectus is ability receive SNMP traps.  This allows the operator to quickly detect physical (links failures, flaps) or logical (adjacencies failures, flaps) changes in the network followed by restoration procedures or root cause analysis.
Let’s see how does it work on example of this Layer 2 diagram:

The SNMP traps are located in top menu “Logs” -> “SNMP traps and Syslog”.

More exactly here:

Once the devices starts sending SNMP traps, they appears withing 2-3 minutes in Nectus:

At the time of the writing, the new SNMP traps decoding is added manually by the Nectus support team, but in the future the operator will have the ability to add the traps decoding with no external assistance.
All these traps were sent by R1 and R2 when GigabitEthernet0/1 on R1 was shut down. Because OSPF was running between R1 and R2, disabling the interface lead to OSPF adjacency between the two routers to go down.
As you can see, some OIDs are represented their original format, whereas some OIDs are represented in a more human readable format.
The details of a trap might look like this:

With the above trap details, you can tell that this is “link down” trap.
However, with other traps, you might need additional knowledge to figure what they represent.
Let’s take another example of detailed trap:

This trap was sent by R1 and it is a neighbor state change(.1.3.6.1.2.1.14.16.2.2):

And it can be read like this: Router-ID 192.168.0.2(.1.3.6.1.2.1.14.1.1) declared neighbor 192.168.0.3(.1.3.6.1.2.1.14.10.1.3) with IP address on the interface 10.0.0.14(.1.3.6.1.2.1.14.10.1.1) as Down(.1.3.6.1.2.1.14.10.1.6 with value of 1).
Obviously this is not very intuitive and Nectus should do all the the decoding so that the operator will not go through all the effort to find what each OID means.

In the future releases user will have an option  to add the decoding for new or unknown SNMP traps via GUI.

 

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Topology mapping for SDN OpenFlow networks with Nectus

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Nectus can monitor OpenFlow capable devices in the same way as the non-OpenFlow devices.
In this article we will show how Nectus can discover and monitor switches that are SDN OpenFlow ready.
We will use following sample topology  for demonstration with Floodlight OpenFlow controller and three OpenFlow switches: Read more

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Network Engineer Toolset in Nectus NMS

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Under the Tools menu, there are quite a few tools that can help the operator to understand better the network, to perform troubleshooting and to gather information from devices.
These are the options: Read more

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Syslog server functionality in Nectus NMS

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This post will cover the SysLog server functionality of  Nectus network monitoring software.
As with any modern network monitoring software Nectus has the ability to receive and store the syslog messages from routers, switches or servers.
Syslog messages can be accessed from Top menu “Logs”: Read more

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Which US city uses the most IPv4 public addresses?

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Note: Information is based on Nectus IP geo-location service

State City IPv4 Addresses
Ohio Columbus 225326103
California Los Angeles 54776440
Arizona Fort Huachuca 54644594
Texas Houston 42689210
District of Columbia Washington 32721834
New York New York City 31867103
Virginia Ashburn 31828300
Indiana Indianapolis 26421929
Georgia Atlanta 25527566
California Palo Alto 25105708
Washington Redmond 24885468
Michigan Dearborn 23705811
North Carolina Durham 21588969
New Jersey Newark 21491795
California San Diego 21485402
Illinois Chicago 20074587
North Carolina Raleigh 18955414
New Jersey Bedminster 17843408
Texas Richardson 17241943
Texas Dallas 16869204
Massachusetts Cambridge 15868348
California San Jose 15336783
Washington Seattle 15260827
Alabama Montgomery 14906638
California Cupertino 13954110
Washington Bellevue 13800919
Connecticut Fairfield 13507953
California San Francisco 12561267
Pennsylvania Philadelphia 12464449
Virginia Reston 11731922
Florida Lake Mary 10572081
New Jersey Mount Laurel 10087552
Colorado Denver 9869523
Missouri Saint Louis 9426794
California Norwalk 9273764
Virginia Virginia Beach 9107341
Michigan Ann Arbor 8772940
California Mountain View 8474238
Connecticut Middletown 8241397
Texas San Antonio 7877211
Texas Austin 7734993
Arizona Phoenix 7649529
Oregon Portland 7600141
New Jersey Rahway 7312241
Florida Miami 6713810
Ohio Cincinnati 6688810
California Concord 6607183
Virginia Dulles 6470388
Missouri Town and Country 5898488
Massachusetts Boston 5557232
Louisiana Monroe 5300043
Colorado Greenwood Village 5070591
Pennsylvania Pittsburgh 4780729
Missouri Kansas City 4578123
Virginia Herndon 4492530
Michigan Detroit 4336217
Pennsylvania Doylestown 4203957
North Carolina Charlotte 4085710
Tennessee Nashville 3916537
Georgia Duluth 3805720
Nevada Las Vegas 3792683
Illinois Naperville 3716723
Florida Orlando 3665033
California Sacramento 3601243
Utah Salt Lake City 3592200
Alabama Redstone Arsenal 3428226
Minnesota Minneapolis 3412363
Florida Tampa 3400441
New Jersey Morristown 3304100
California Santa Clara 3252933
New York Rochester 3189712
Maryland Baltimore 3079657
Minnesota Saint Paul 3019512
Arizona Kingman 2983075
Massachusetts Springfield 2927039
Wisconsin Milwaukee 2811053
Colorado Fort Collins 2752782
Wisconsin Madison 2732615
California Belmont 2725536
Texas Plano 2671935
Virginia Arlington 2668836
Connecticut Stamford 2609471
Ohio Cleveland 2600011
Kansas Overland Park 2528866
Texas Irving 2512563
Kentucky Richmond 2509411
Texas Fort Worth 2494944
Arkansas Little Rock 2446145
Florida Jacksonville 2423627
Missouri Columbia 2266295
Oregon Beaverton 2224613
New York Buffalo 2210272
California San Ramon 2131203
Ohio Akron 2098568
California Pleasanton 2097585
Maryland Rockville 2072266
California San Mateo 2044008
Nebraska Omaha 2020147
New York Albany 2018827
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Meltdown and Spectre bugs in simple words.

Meltdown and Spectre bugs in simple words.

All modern processors have very important feature called “Speculative Execution” where CPU tries to predict all possible operations that might be required to be executed next and actually executing those without knowing for sure which one will be the next.

Those guesses are called Speculative Branches. By the time when next operation is determined CPU already executed it as part of “Speculative Execution” but it also executed all other branches that no longer needed. Not only it executed unneeded operations it also kept the data for those branches. Data that was processed during unneeded Speculative Execution branches remains accessible for some time before it is completely discarded.

But data protection is only enforced for main execution branch, but not for Speculative Execution branches making it possible to access sensitive data that normally should not be accessible. Good intentions causes harm..

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View routing tables in Nectus GUI

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One of the latest features that was added this week is “Routing Table” view in device context menu. Read more

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Nectus features presentation. January 2018

PowerPoint Nectus features presentation as of January 2018

Nectus Overview

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Will SDN kill CLI?

Trust me. CLI is not going anywhere. CLI is the only way to troubleshoot SDN.
There will be plenty of new CLI commands to “show” flow tables logic, operation
and debug communications between data plane and controller.

I would say importance of CLI is even greater in SDN as you now has
to observe operation between Control plane and Data plane which previously “just worked”.

CLI is here to stay, it just going to be used mostly for monitoring rather than configuration.

 

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Monitoring of OpenFlow SDN networks

So.. you upgraded your network from legacy dedicated hardware to OpenFlow based SDN, laid off all of your network engineers who know CLI and ask yourself a question: How do I monitor my SDN now?

How do I pull a power supply status or CPU temperature? How to read TCAM utilization level? How to see an SFP status or number of CRC errors?

If we look into OpenFlow specifications, it defines communication protocol between OpenFlow controller (control plane) and OpenFlow switch (data plane) it goes into details of flow creation and management but there is nothing that tells how hardware monitoring has to be implemented on OpenFlow SDN switch.

Access to operational monitoring features that we love so much is not a part of OpenFlow specifications and will not be a part of SDN controller functionality. Old and proven SNMP-based monitoring is likely to continue to be a primary way to monitor your Data plane operation as it was with legacy dedicated hardware unless OpenFlow specs get expanded with new monitoring specifications.

 

Download the best SDN monitoring tool

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