Important Points To Remember - Dell Force10 S4810P Configuration Manual
High-density, 1ru 48-port 10gbe switch
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Figure 45-6. Confirming that Extended sFlow is Enabled
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
Figure 45-7. Confirming that Extended sFlow is Disabled
FTOS#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
•
The IP destination address has to be learned via BGP in order to export extended-gateway data, prior to
FTOS version 7.8.1.0.
•
If the IP destination address is not learned via BGP the Dell Force10 system does not export
extended-gateway data, prior to FTOS version 7.8.1.0.
•
FTOS 7.8.1.0 and later enhances the sFlow implementation for real time traffic analysis on the
E-Series to provide extended gateway information in cases where the destination IP addresses are
learned by different routing protocols, and for cases where the destination is reachable over ECMP.
•
If the IP source address is learned via IGP then 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.
The previous points are summarized in following table.
Extended sFlow settings
show all 3 types are enabled
output is as shown in
show
Indicates no Extended sFlow types
enabled.
Figure
45-7.
sFlow | 943
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Troubleshooting
