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For questions about Internet Protocol Flow Information Export (IPFIX), where it is an IETF protocol that was created based on the need for a common, universal standard of export for Internet Protocol flow information from routers, probes and other devices. See RFC 3917, 7011, 7015 and 5103.

1 vote

ipfix - variance of size packets in a flow

RMON can show the number of frames by size class, e.g. for HP Provision switches show rmon statistics <portno>: Status and Counters - Port Counters for port 24 Drop events : 0 …
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1 vote
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IPFIX vlanId element in access switchports

If there's no explicit VLAN tag (802.1Q), vlanId is the VLAN ID associated with an untagged frame for the ingress port.
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Best practices to build network flow monitoring

IPFIX support is still somewhat scarce. sFlow support across device vendors is broader, so that might be the most promising path. …
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Identifying Application Information and MAC Addresses Using IPFIX Data

That isn't usually done on the IPFIX exporter but further up in the workflow. … . - isn't defined by IPFIX standards. The field itself is defined in RFC 6759. Data link layer (L2) information is not commonly included in IPFIX data. There's a draft RFC 7133. …
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