I also learned that the Blue Coat Crossbeam security automation solution also supports NetFlow as does the Checkpoint firewall and the Packeteer PacketShaper. I’m particularly concerned about where it says “ or two minutes after the first flow record is collected” because I noticed that there is no active or inactive timer setting in the above configuration and this could lead to spikes in the utilization trends. Visit your NetFlow Analyzer to verify that the flows are coming in and give us a shout if you are having any issues. Use the show netflow CLI command to verify that the MACH5 appliance is sending flow records. Verify The Blue Coat MACH5 NetFlow Configuration Flow records are actually bundled together into NetFlow packets the MACH5 appliance sends a packet to the collector after it reaches the maximum of 30 flow records, or two minutes after the first flow record is collected, whichever comes first. The Blue Coat MACH5 appliance will now send flow detail records of data seen on the specified interface to the defined flow collectors. We have seen this become a problem with Riverbed NetFlow exports as well. If the active flow cache timer on each flow exporter is not set correctly, NetFlow Interface resource(s) can show utilization peaks higher than NPM utilization or higher than the interface bandwidth. Please send us a packet capture of your flows and we will verify that the direction bit is being exported. 115k flow entries if cache has to many flows then flows are dropped (lower Inactive timer) Alleviate load problems by using sampled netflow Use flow masks on 65k Use. This is VERY important because the MACH5 is compressing data and users will want to compare the in traffic on interface 1 to the out traffic on interface 2, to verify compression ratios. Memory -Netflow Cache Timers: Inactive timer (Normal Aging) on 6k its default is 256 sec - should set it to 30 sec Active timer (Long Aging ) 32 minutes PFC3B can hold approx. If this is the case, a direction bit needs to be exported. I’m assuming that this means ingress and egress metering. If no parameter is specified, the default is used (inout). NetFlow input (in), output (out), or both (inout).AD is primarily used to store, give permissions, and manage information about users and their resources. It comes with any Windows Server that has the Active Directory Domain Services role (AD DS) installed. (Optional) If you want to limit the number of flow detail records that are sent to the collector, specify the MACH5 interface(s) that you want to monitor: Active Directory (AD) is a directory service for Windows domain networks.Define additional collectors, if available.When the timer expires, the statistics of the active flow are exported to. Enter the collector’s IPv4 or IPv6 address and the port on which it is listening. A company can use NetStream to understand the network traffic patterns and.Type the following CLI commands to define a flow collector:.Type conf t to go into configuration mode.Access the MACH5 CLI, with enable (write) access.In the Blue Coat MACH5 NetFlow configuration, you need to define the port and IP address of the flow collector(s), specify which interfaces you want to monitor, and enable NetFlow processing. Setup The Blue Coat MACH5 NetFlow configuration The MACH5 is a WAN optimization solution and combines protocol acceleration, compression, object and byte caching and QoS to help accelerate key applications. IPFIX is the official standard for all flow technologies and although interest in the proprietary sFlow technology has begun to shrink over the past few years, the IPFIX standard includes provisions for real-time packet sampling as well. Reference Documentation: Flexible Netflow Configuration Guide for IOS Release 15.Good news, the Blue Coat MACH5 NetFlow support is now part of a growing community of vendors supporting NetFlow and or IPFIX. show flow record - Displays information about NetFlow flow records.p - Displays the contents of the cache for the flow monitor, in the format specified.Create a flow record and enter the flow record config mode:.Flexible NetFlow allows you to define an optimal flow record for a particular application by selecting the keys from a large collection of predefined fields. NX-OS supports the Flexible NetFlow feature that enables enhanced network anomalies and security detection. In this post, I'll go over NetFlow configuration on NX-OS and IOS Catalyst switches NX-OS Flexible Netflow Configuration for 7.x: This is a continuation of my previous post.
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