ipv6 flow. ipv6 flow options netflow v9 (aka cflow/jflow) sflow ipfix
TRANSCRIPT
IPv6 Flow
IPv6 Flow Options
• Netflow v9 (aka cflow/jflow)
• Sflow
• IPFix
Common Netflow versions
• Netflow v5 - Fixed record format, no support for IPv6– Supported by Cisco, Juniper, Alcatel
• Netflow v9 - Variable record format/template, supports IPv6– Supported by Cisco and Juniper although
Juniper doesn’t yet support IPv6 traffic reporting in cflowd v9
Cisco IPv6 Netflow v9 Configuration
• General Configuration– ipv6 flow-export version 9– Ipv6 flow-export destination <ip-address>
<port-no>– Ipv6 flow-export template refresh-rate
<rate-value>– Ipv6 flow-export template timeout <timeout-
value>
Cisco IPv6 Netflow
• Interface specific commands– Ipv6 flow ingress– Ipv6 flow egress
CLI Management Commands
• Show ip cache flow
• Clear ip flow stats
IPFix
• IETF working group effort
• Improves on Cisco’s Netflow v9
• See: http://www.nanog.org/meetings/nanog41/presentations/nanog41-ipfix.pdf
Sflow
• Includes packet header information
• Used by Extreme, Force10, Foundry
Things to Watch For
• Simultaneous IPv6 and flow support• Impact of IPv6 flow on router or switch
performance• Corner case behavior:
– MPLS– Multicast– Dropped packets