What Is A Flow Exporter?

What is IP flow export version 9?

The use of templates with the NetFlow Version 9 export format provides several other key benefits: You can export almost any information from a router or switch including Layer 2 through 7 information, routing information, IP Version 6 (IPv6), IP Version 4 (IPv4), and multicast information.

What is NetFlow and how is it used?

NetFlow is a network protocol system created by Cisco that collects active IP network traffic as it flows in or out of an interface. The NetFlow protocol is used by IT professionals as a network traffic analyzer to determine its point of origin, destination, volume and paths on the network.

How many flow exporters are needed per network device in the Flexible NetFlow configuration?

Flow exporters support up to ten exporters per flow monitor. Original NetFlow is limited to only two export destinations per cache.

What is IP Flow Monitor?

NetFlow is a Cisco technology that provides statistics on packets flowing through a router. NetFlow provides data to support network and security monitoring, network planning, traffic analysis, and IP accounting.

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What is SFlow vs NetFlow?

SFlow is a pure packet sampling technology. The most notable difference of SFlow vs NetFlow is that SFlow is network layer independent and has the ability to sample everything and to access traffic from OSI layer 2-7, while NetFlow is restricted to IP traffic only.

What is IP route cache flow?

The route cache allows outgoing packets to be load-balanced on a per-destination basis. The ip route-cache command with no additional keywords enables fast switching. Our routers generally offer better packet transfer performance when fast switching is enabled, with one exception.

Is NetFlow a Layer 3?

NetFlow only summarizes traffic that passes from one VLAN to another (interVLAN) or routed traffic which does not show layer 3 switched traffic. This is due to disabled NetFlow on the VLAN interface. Enables Netflow on the layer 3 interface.

Why do we need NetFlow?

NetFlow is a technology developed by Cisco that allows you to collect IP traffic information so you can monitor your traffic and see who is using your bandwidth and why. It is a powerful and extremely useful tool for network monitoring and something every network administrator should know how to use.

Is NetFlow a protocol?

NetFlow is a protocol developed by Cisco Systems to record all IP traffic flows traversing a router or switch that is NetFlow enabled.

Is NetFlow TCP or UDP?

NetFlow records are traditionally exported using User Datagram Protocol (UDP) and collected using a NetFlow collector. The IP address of the NetFlow collector and the destination UDP port must be configured on the sending router. A common value is UDP port 2055, but other values like 9555 or 9995, 9025, 9026 etc.

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What does ip flow ingress command do?

The command ip flow ingress is issued to ensure that all flows passing through the router can be monitored regardless of direction. Traffic may be monitored in any direction, which makes options B, C, and D incorrect choices.”

How do you configure net flow?

Configuring NetFlow and NetFlow Data Export Using the Version 9 Export Format

  1. enable.
  2. configure terminal.
  3. ip flow-export destination {ip-address | hostname} udp-port.
  4. Repeat Step 3 once to configure a second NetFlow export destination.
  5. ip flow-export version 9.
  6. interface interface-type interface-number.

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