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• extended-router — Next-hop and source and destination mask length.
• extended-gateway — Source and destination AS number and the BGP next-hop.
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.
• Enable extended sFlow.
sflow [extended-switch] [extended-router] [extended-gateway] enable
By default packing of any of the extended information in the datagram is disabled.
• Confirm that extended information packing is enabled.
show sflow
Examples of Verifying Extended sFlow
The bold line shows that extended sFlow settings are enabled on all three types.
Dell#show sflow
sFlow services are enabled
Egress Management Interface sFlow services are disabled
Global default sampling rate: 32768
Global default counter polling interval: 20
Global default extended maximum header size: 128 bytes
Global extended information enabled: none
1 collectors configured
Collector IP addr: 100.1.1.1, Agent IP addr: 1.1.1.2, UDP port: 6343 VRF:
Default
0 UDP packets exported
0 UDP packets dropped
0 sFlow samples collected
stack-unit 1 Port set 0
Te 1/1/1: configured rate 16384, actual rate 16384
Dell#
If you did not enable any extended information, the show output displays the following (shown in bold).
Dell#show sflow
sFlow services are disabled
Global default sampling rate: 32768
Global default counter polling interval: 20
Global extended information enabled: none
0 collectors configured
0 UDP packets exported
0 UDP packets dropped
0 sFlow samples collected
0 sFlow samples dropped due to sub-sampling
Important Points to Remember
• To export extended-gateway data, BGP must learn the IP destination address.
• If the IP destination address is not learned via BGP the Dell Networking system does not export
extended-gateway data.
• If the IP source address is learned via IGP, srcAS and srcPeerAS are zero.
• The srcAS and srcPeerAS might be zero even though the IP source address is learned via BGP. The c
system packs the srcAS and srcPeerAS information only if the route is learned via BGP and it is
reachable via the ingress interface of the packet.
864
sFlow