***Network Management and Monitoring Using Observium ***
Welcome to Part-2!!
Step-9: While we wait for the traffic to appear, we can navigate the interface.
Go to http://observiumX.ws.gpontutorials.com/
Click on “Devices” in menu at the top.
Find the router for your group in the list, and click on its name.
You will land on the Overview page for your device.
You will notice that Observium has automatically detected many, many things about your router!
At the top, under your router’s hostname, you will see a list of tabs, all of them presenting information about your device:
Overview | Graphs | Health | Ports | Routing | Map | Inventory | Logs | Alerts
Under “Graphs”, you will see all information which can be presented in the form of a graph: Network IO, Disk IO, Memory and CPU usage, etc…
You will also see the “Health” tab, which offers various metrics on how the device is doing hardware wise – if this information is available – such as temperature, voltage, fan speed, etc… Notice that some of this information is already shown in the overview page for the device (which you get when you click on the name of the device).
Next we’ll take a look at the Ports menu tab. Under “Ports” you will find a summary of traffic for all ports, including bits per second and packets per second, port speed, and the type of connection (Ethernet or other).
Note that all elements can be clicked on, including the small graphs, and you will be taken to the corresponding page for the data source.
The Routing tab will present you with an overview of enabled routing protocols. If you have enabled OSPF or BGP on your routers, you will get information about the active sessions, neighbors or peers, and other protocol specific information.
The Map tab is an automatically generated diagram of the topology of your network, as seen from the point of view of your router. This will only function for CDP/LLDP enabled devices (Cisco, IOS, …)
Inventory contains a full list of hardware modules and serial numbers for equipment installed on your router. Note that this will not work on all vendors.
Under Logs you will see a list of events for your router: changes that have taken place in the configuration of the device, or in the state of interfaces, services, etc.
Alerts is currently empty for your router – we will see more about this later.
Step-10: Add a location and contact for your router
If you navigate back to the Overview page for your router (Go to Devices, click on your router’s name), you will see that Observium has picked up the Hardware platform, the Operating System and the Uptime for your device.
Now, log into your router with SSH and add the following information to your SNMP configuration:
– Set the location (whatever you want: city, country, etc…)
– Set the contact (email address or name)
To do this:
rtr8# conf terminal
Enter configuration commands, one per line. End with CNTL/Z.
rtr8(config)# snmp-server contact firstname.lastname@example.org
rtr8(config)# snmp-server location Here in Bhutan, Thimphu
rtr8# write memory
If you wait a few minutes (maximum 5), you should see this information appear automatically on the Overview tab for your router in Observium. While you are still logged in to your router, add a pseudo interface to your router, to see if Observium will pick it up:
rtr8(config)# interface loopback123
rtr8(config-if)# description A useless interface
rtr8# write memory
This should also show up in Observium after a while – try and find it under “Ports”
Step-11: IP address lookup
From Observium’s main page, you will find, under the Overview menu (at the TOP of the page), 4 options:
IPv4 search -> http://observiumX.ws.gpontutorials.com/search/search=ipv4/
IPv6 search -> http://observiumX.ws.gpontutorials.com/search/search=ipv6/
MAC search -> http://observiumX.ws.gpontutorials.com/search/search=mac/
ARP tables -> http://observiumX.ws.gpontutorials.com/search/search=arp/
Using the IPv4 and ARP table searches, try and search IPs of equipment in the class:
– IP of the GW (10.10.0.254)
– IPs of the routers (10.10.0.X, 10.10.X.254)
– IPs of the PCs (10.10.1.1, 10.10.5.17, etc…)
– Try and search IPs for your OWN laptop!
Find the IP of you own laptop, and see if you can search it in Observium. Can you ? Why ?
Step-12: Add the switch
From the TOP menu “Devices”, choose “Add device”.
Fill out the fields:
Click on “Add Host”. After a few seconds, it should have added the switch.
After a few minutes, data should appear in Observium for the switch.
Notice the “Ports” line at the TOP right of the Observium interface.
Does it say that ports are down ? Which ones ?
Try and click on the ‘X down’ ports message to see which ports are down on which devices.
Step-13: Let’s disable ports that are unused!
Find the Overview page for “sw.ws.gpontutorials.com”.
From there, you can configure the device (the “key” icon on the top right). You are then presented with a configuration page for the device.
Click on Ports, then you will get an overview of the Port status
on the switch. Look at the ones that are “down”.
For those that are “down”, check the “Ignore” box, then “Save” under “Index”.
If you call back the main Observium page:
… Observium should no longer complain about these ports!
Step-14: Have you tried adding your PC yet ? Other peoples ?
– From the top menu, choose Devices -> All devices
– Find your router, and click on it on the list.
– Below the graph summary, you’ll see a list of the interfaces on your router:
Fa0/0, Fa0/1, Null0
– Click on Fa0/0
– Click on “Real Time”