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DEMO: Configuring SNMP

Simple Network Management Protocol (SNMP) enables centralized monitoring and control of network devices by collecting logs and event data from across the infrastructure. This content covers how to configure a wireless LAN controller to send SNMP trap messages to a designated SNMP server.

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About this video

Simple Network Management Protocol (SNMP) is a widely used network management standard that allows devices to exchange operational data with a central server. That server can either poll devices directly for logs and status information or receive data pushed from devices in the form of SNMP traps — discrete event notifications triggered by specific conditions on the network. Centralizing this data makes it significantly easier to monitor the health and security posture of an entire infrastructure from a single point rather than reviewing each device individually. This content demonstrates how to configure a wireless LAN controller to send SNMP traps to a designated SNMP server. The process begins in the controller's management interface, where an SNMP trap receiver entry is created by assigning a community name and the IP address of the target server — typically hosted on a dedicated server or management network segment. Once enabled and applied, the controller begins forwarding trap data to that server automatically. The practical value of this configuration becomes clear in operational and security contexts. When suspicious activity occurs — such as an attempted intrusion or an unusual spike in traffic — administrators can pull up the SNMP server and review aggregated logs from all connected devices simultaneously, accelerating both diagnosis and response without the overhead of accessing each device separately.

What you'll learn

What's covered

SNMP on Wireless LAN Controller

Aligned to

Cisco CCNA
4.4 Explain the function of SNMP in network operations
2.9 Interpret the wireless LAN GUI configuration for client connectivity
4.5 Describe the use of syslog features, including facilities and severity levels

Key terms

Simple Network Management Protocol
SNMP
A protocol used to monitor and manage network devices such as routers, switches, and servers.
Log Management
The process of collecting, storing, analyzing, and monitoring log data generated by systems and applications.
Wireless Access Point
WAP
A device that allows wireless devices to connect to a wired network using Wi-Fi.
IP Address
A numerical label assigned to each device connected to a network that uses the Internet Protocol.
SNMP Trap
An unsolicited notification sent from a network device to an SNMP server to report a specific event or condition.
SNMP Trap Receiver
A configured destination, typically an SNMP server, that accepts and collects trap messages sent by managed network devices.
Wireless LAN Controller
WLC
A network device that provides centralized management of multiple lightweight wireless access points, handling functions such as client authentication, roaming, radio frequency management, and security policy enforcement. WLCs communicate with APs using CAPWAP and allow network-wide wireless configuration from a single management point.

Topics

Snmp Network Monitoring Wireless Lan Controller Snmp Traps Network Management Networking

Transcript

There's a protocol that we haven't talked a lot about up until now, and it's called Simple Network Management Protocol. We will be getting a little bit deeper into it later, but essentially SNMP, or Simple Network Management Protocol, is a protocol that allows a server to talk back and forth between devices and do a couple of different things. Number one, it can actually control certain behavior on those devices and be able to pull in logs and information from those devices. Or we can set up our devices to send data to the SNMP server. What we're going to do is set up our wireless LAN controller to be able to send SNMP messages to an SNMP server.

Setting up the trap receiver

The setup for this is actually pretty simple. What we're going to do is click on this Management tab right here, and on the left hand side we can see that there's this SNMP area. We're going to open up the SNMP area. We have several selections through here, and this is depending on how we want to set up SNMP to either receive or grab this data.

What we're going to actually do is set up a trap receiver. This SNMP trap receiver means that there are traps, or different information, that we're going to capture and send to the SNMP server. So that's what we have right here, SNMP trap receiver, and we're going to create new.

We've got to create a community name, and I'm just going to call this snmp1 for the community name. Then the IP address: this is where we would put an IP address into this field, of the server that we want to send this to. I just use the example here of 10.1.20.45, and this would be something that's on our server network that's capturing this data. Or perhaps we'd want this on our management network, but since we have a whole network devoted to being for servers, we're going to just say our SNMP server's on that network.

Then we'll enable this and we'll hit apply. IPsec is if we want to secure the transfer of this. I'm just going to hit apply here, and then we would actually have this configured.

Why it's useful

So that is how you set up SNMP — or this is not a server, this is sending data to the server, so the server then can collect this data. Then we would have one single point at which we could go and see all the logs of our devices.

This is really helpful for trying to see certain information, what's happening on these different devices. As an example, maybe our network is trying to be hacked, and then we'll be able to pull up the server and look at all of these logs that are coming into the server from the different devices and see what's happening on all of our devices at the same time, rather than going to each individual device and taking a look at the logs of each individual device.

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