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Aggregation mode
Aggregation criteria
ToS-prefix aggregation
•
ToS
•
Source AS number
•
Source prefix
•
Source address mask length
•
Destination AS number
•
Destination address mask length
•
Destination prefix
•
Inbound interface index
•
Outbound interface index
ToS-protocol-port aggregation
•
ToS
•
Protocol type
•
Source port
•
Destination port
•
Inbound interface index
•
Outbound interface index
If packets are not forwarded according to the BGP routing table, the AS number or BGP next hop
cannot be obtained.
NetStream export formats
NetStream exports data in UDP datagrams in one of the following formats:
•
Version 5
—Exports original statistics collected based on the 7-tuple elements and does not
support the NetStream aggregation data export. The packet format is fixed and cannot be
extended.
•
Version 8
—Supports the NetStream aggregation data export. The packet format is fixed and
cannot be extended.
•
Version 9
—Based on templates that can be configured according to the template formats
defined in RFCs. Version 9 supports exporting the NetStream aggregation data and collecting
BGP next hop statistics.
•
Version 10
—Similar to version 9. The difference between version 9 and version 10 is that
version 10 export format is compliant with the IPFIX standard.
NetStream filtering
NetStream filtering uses an ACL to identify packets. Whether NetStream collects data for identified
packets depends on the action in the matching rule.
•
NetStream collects data for packets that match permit rules in the ACL.
•
NetStream does not collect data for packets that match deny rules in the ACL.
For more information about ACL, see
ACL and QoS Configuration Guide
.
NetStream sampling
NetStream sampling collects statistics on fewer packets and is useful when the network has a large
amount of traffic. NetStream on sampled traffic lessens the impact on the device's performance. For
more information about sampling, see "
."