What is the difference between NetFlow and SNMP?

SNMP datagrams are continuously sent across the network in real-time (i.e. every second) as responses to SNMP queries, while the exporting of NetFlow records depends on active/inactive timers. It may take up to 30 minutes to export a flow when NetFlow is used.

What is difference between NetFlow and sFlow?

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. Does not capture any packets.

What is Ipfix vs NetFlow?

An IETF standard that emerged in the early 2000s, Internet Protocol Flow Information Export (IPFIX) is extremely similar to NetFlow. In fact, NetFlow v9 served as the basis for IPFIX. The primary difference between the two is that IPFIX is an open standard, and is supported by many networking vendors apart from Cisco.

What is sFlow protocol?

sFlow, short for “sampled flow”, is an industry standard for packet export at Layer 2 of the OSI model. sFlow was originally developed by InMon Corp. It provides a means for exporting truncated packets, together with interface counters for the purpose of network monitoring.

Is NetFlow TCP or UDP?

The standard or most common UDP port used by NetFlow is UDP port 2055, but other ports, such as 9555, 9995, 9025, and 9026, can also be used. UDP port 4739 is the default port used by IPFIX.

What is the difference between NetFlow and syslog?

What is important to keep in mind is that while some NetFlow information is available in syslog events, in general the information is different. Syslog handles system events and auditing, while NetFlow has disparate understanding of packets being sent and received.

Is NetFlow Cisco only?

As more network device hardware vendors come into the industry, sFlow and other Flow protocols will become more widely used since Netflow cannot be used with any device other than Cisco.

Does Cisco support IPFIX?

An account on Cisco.com is not required. IPFIX is an IETF standard based on NetFlow v9. The Flexible NetFlow IPFIX Export Format feature enables sending export packets using the IPFIX export protocol. The export of extracted fields from NBAR is only supported over IPFIX.

Is sFlow UDP or TCP?

By default, sFlow uses UDP port 6343 (this can be changed if required – see Section 13.2.

What layer is NetFlow?

Netflow will only summarize Layer 3 traffic. This means you will only see traffic that passes from one VLAN to another (interVLAN) or routed traffic.

Is NetFlow still used?

NetFlow and IPFIX The NetFlow protocol itself has been superseded by Internet Protocol Flow Information eXport (IPFIX).