The cutting edge Cisco 7600 Series is an edge router that delivers robust, high performance IP/MPLS features for service provider and enterprise WAN/MAN applications. There are some common Cisco 7600 NetFlow problems that you should be aware of when enabling Cisco 7600 NetFlow exports.
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Good news, with the 7.4 release, the Cisco Wireless LAN Controller will now start exporting Netflow v9 entries. Together with the Cisco Application Visibility & Control innovation, the Cisco Wireless NetFlow support includes features such as:
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Read about virtual routing first before reading this post. VRF aware Netflow is available in Scrutinizer since v7 and in IOS starting with 12.4(11)T, however I also saw in some documentation that support for VRF input was added in 15.0(1)M. This is of course via Flexible Netflow. You can set the input VRF as a key field in the NetFlow record, then use the VRF ID to filter reports based on that VRF in scrutinizer.
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Are you looking for Catalyst 3750 NetFlow Support? Unless you own the X model (i.e. Catalyst 3750X) you will need to span a port to an nBox, a SonicWALL in bridge mode or similar. The Catalyst 3750X NetFlow support is only available if you have invested in the 3KX module. Without the 3KX, this switch only supports Smart Logging and Telemetry Flexible NetFlow exports.
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Are you in need of a Cisco NetFlow collector for network traffic analysis? Do you have an overwhelming amount of traffic on your network, but no way to tell who is using all the bandwidth? You’ve come to the right place! Our NetFlow reporting tool has the most flexible reporting engine available, so you can always find the flows you’re looking for.
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Here’s how to configure the 3KX NetFlow support on the Cisco Catalyst 3750X. I also outlined exporting CoS with NetFlow or really Flexible NetFlow (FnF).
Setting up Flexible NetFlow is a simple process if you fully understand the 4 steps. Here’s what I ran to get it working:
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What is packet loss and how do I troubleshoot packet loss with NetFlow and IPFIX? I remember when I was growing up we had a satellite connection for our television and when we would get a big snow storm while watching a movie the quality would become so poor that the movie would look like the image in this post and the movie would become unwatchable. We can attribute the poor video quality to network packet loss, as it’s hard to send network traffic through a blizzard.
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This is part 2 of a two part blog on using Cisco IOS within routers to capture specific packets which can be downloaded and viewed locally. Part 1 explains how to setup the packet capture. The second part outline below explains how to use Medianet Performance Monitoring with Embedded Event Manager (EEM) and embedded packet capture functionality to automatically provide the packets involved with a connection problem. In this example, we are capturing VoIP traffic.
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I wanted this blog to be about using Flexible NetFlow Immediate Cache to capture packets. The problem from my limited understanding is that it can only be done on all TCP or UDP frames as there is currently no filtering capability. For example you can’t setup a Flexible NetFlow (FnF) Immediate Cache to capture only UDP voice traffic for a specific host. However, I recently learned about Cisco EEM (Embedded Event Manager) which basically allowed us to do what we needed.
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Are you looking for NetFlow configuration help for the Cisco 4500-E, 2960, 3560, or 3750-X series? Well, you’ve come to the right place then!
Several months ago I blogged about configuring the Cisco 4500 Sup7e for NetFlow v9 and have since had calls asking how to configure a 4510 or 4503. Hmmmmmm…… I had blogged about that, but hadn’t included all the models it applied to. So if you have any of these devices: Cisco 4503-E, 4506-E, 4507-E, or 4510R+E, you should check out my blog on Cisco 45xx-E NetFlow configuration.
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