Dell Force10 S55T S55 Configuration Guide FTOS 8.3.5.3 - Page 677
Important Points to Remember, learned by different routing protocols
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Figure 37-6. Confirming that Extended sFlow is Enabled Force10#show sflow sFlow services are enabled Global default sampling rate: 4096 Global default counter polling interval: 15 Extended sFlow settings show all 3 types are enabled 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 Figure 37-7. Figure 37-7. Confirming that Extended sFlow is Disabled Force10#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 Indicates no Extended sFlow types enabled. 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 Dell Force10 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. sFlow | 677
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