Reference Guide

918 | sFlow
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sFlow on LAG ports
When a physical port becomes a member of a LAG, it inherits the sFlow configuration from the LAG port.
Extended sFlow
Extended sFlow is supported fully on platform e
Platforms
c and s support extended-switch information processing only.
Extended sFlow packs additional information in the sFlow datagram depending on the type of sampled
packet. The following options can be enabled:
•
extended-switch — 802.1Q VLAN ID and 802.1p priority information
•
extended-router — Next-hop and source and destination mask length.
•
extended-gateway — Source and destination AS number and the BGP next-hop.
Use the command
sflow [extended-switch] [extended-router] [extended-gateway] enable command. By
default packing of any of the extended information in the datagram is disabled.
Use the command
show sflow to confirm that extended information packing is enabled, as shown in the
following example.
FTOS#show sflow
sFlow services are enabled
Global default sampling rate: 4096
Global default counter polling interval: 15
Global extended information enabled: gateway, router, switch
1 collectors configured
Collector IP addr: 10.10.10.3, Agent IP addr: 10.10.0.0, UDP port: 6343
77 UDP packets exported
0 UDP packets dropped
165 sFlow samples collected
69 sFlow samples dropped due to sub-sampling
Linecard 1 Port set 0 H/W sampling rate 8192
Gi 1/16: configured rate 8192, actual rate 8192, sub-sampling rate 1
Gi 1/17: configured rate 16384, actual rate 16384, sub-sampling rate 2
Linecard 3 Port set 1 H/W sampling rate 16384
Gi 3/40: configured rate 16384, actual rate 16384, sub-sampling rate 1
If none of the extended information is enabled, the show output is as shown in the following example.
FTOS#show sflow
sFlow services are disabled
Note: The entire AS path is not included. BGP community-list and local preference information are not
included. These fields are assigned default values and are not interpreted by the collector.