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Version 8 Formats and Fields

A detailed explanation of version 8 packet formats and fields is shown as follows:

Figure 1: Version 8 Template Flow Format

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Table 1: Version 8 Flow Template Fields

Field

Description

Version

8

Count

The number of records in the protocol data unit (PDU) or packet

sysUptime

Current time elapsed, in milliseconds, since the router started

UNIX seconds

Current seconds since 0000 UTC 1970

UNIX nanoseconds

Residual nanoseconds since 0000 UTC 1970

Flow sequence number

Sequence counter of total flows received

Engine type

Type of flow switching engine

Engine ID

ID number of the flow switching engine

Aggregation method

Aggregation method used

Aggregation version

Version of the aggregation export

Reserved

Empty field reserved for future usage

Figure 2: Version 8 AS Aggregation Flow Entry Format

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Table 2: Version 8 AS Aggregation Flow Entry Fields

Field

Description

Flows

Total number of flows

Packets

Total number of packets received in a flow

Bytes

Total number of bytes received in a flow

Start time of flow

System up time, in seconds, at the start of the flow

End time of flow

System up time, in seconds, at the end of the flow

Source AS

AS number of the source address

Destination AS

AS number of the destination address

Input interface

SNMP index value for the input interface where the router receives flows

Output interface

SNMP index value for the output interface where the router forwards flows

Figure 3: Version 8 Protocol/Port Aggregation Flow Entry Format

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Table 3: Version 8 Protocol/Port Aggregation Flow Entry Fields

Field

Description

Flows

Total number of flows

Packets

Total number of packets received in a flow

Bytes

Total number of bytes received in a flow

Start time of flow

System up time, in seconds, at the start of the flow

End time of flow

System up time, in seconds, at the end of the flow

IP protocol

IP protocol number

Padding

Bytes available to ensure a minimum packet length

Reserved

Empty field reserved for future usage

Source port

Source application port

Destination port

Destination application port

Figure 4: Version 8 Prefix Aggregation Flow Entry Format

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Table 4: Version 8 Prefix Aggregation Flow Entry Fields

Field

Description

Flows

Total number of flows

Packets

Total number of packets received in a flow

Bytes

Total number of bytes received in a flow

Start time of flow

System up time, in seconds, at the start of the flow

End time of flow

System up time, in seconds, at the end of the flow

Source prefix

Source IP address prefix

Destination prefix

Destination IP address prefix

Source mask length

Source address network mask length

Dest. mask length

Destination address network mask length

Reserved

Empty field reserved for future usage

Source AS

AS number of the source address

Destination AS

AS number of the destination address

Input interface

SNMP index value for the input interface where the router receives flows

Output interface

SNMP index value for the output interface where the router forwards flows

Figure 5: Version 8 Source Prefix Aggregation Flow Entry Format

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Table 5: Version 8 Source Prefix Aggregation Flow Entry Fields

Field

Description

Flows

Total number of flows

Packets

Total number of packets received in a flow

Bytes

Total number of bytes received in a flow

Start time of flow

System up time, in seconds, at the start of the flow

End time of flow

System up time, in seconds, at the end of the flow

Source prefix

Source IP address prefix

Source mask length

Source address network mask length

Padding

Bytes available to ensure a minimum packet length

Source AS

AS number of the source address

Input interface

SNMP index value for the input interface where the router receives flows

Reserved

Empty field reserved for future usage

Figure 6: Version 8 Destination Prefix Aggregation Flow Entry Format

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Table 6: Version 8 Destination Prefix Aggregation Flow Entry Fields

Field

Description

Flows

Total number of flows

Packets

Total number of packets received in a flow

Bytes

Total number of bytes received in a flow

Start time of flow

System up time, in seconds, at the start of the flow

End time of flow

System up time, in seconds, at the end of the flow

Destination prefix

Destination IP address prefix

Dest. mask length

Destination address network mask length

Padding

Bytes available to ensure a minimum packet length

Destination AS

AS number of the destination address

Output interface

SNMP index value for the output interface where the router forwards flows

Reserved

Empty field reserved for future usage

For more information about version 5 and version 8 packet formats and fields, see http://www.caida.org.


Published: 2010-04-15

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