
© 2005 Extreme Networks, Inc. All Rights Reserved
sFlow Traffic Analysis
one part of the Clearflow functionality
Protocol for traffic accounting:
•
Usage-based billing
• Baselining
• Troubleshooting
• Security (Attack Identification)
Defined in RFC 3176
Similar to Netflow
•
But takes samples and extrapolates network traffic profile
Switching
Engine
1 in N
sampling
packet header src/dst i/f sampling parms forwarding user ID URL i/f counters
sFlow
agent
forwarding
tables
interface
stats/counters
sFlow Datagram
eg 128B
rate
pool
src 802.1p/Q
dst 802.1p/Q
next hop
src/dst mask
AS path
communities
localPref
src/dst
Radius
TACACS
sFlow Collector &
Analyzer
Network
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