Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 919
Important Points to Remember, extended-gateway data, prior to FTOS version 7.8.1.0.
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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 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. Table 50-1. Extended Gateway Summary IP SA IP DA static/connected/ IGP static/connected/ IGP BGP static/ connected/IGP BGP static/ connected/IGP srcAS and dstAS and srcPeerAS dstPeerAS Description - - Extended gateway data is not exported because there is no AS information. 0 Exported src_as & src_peer_as are zero because there is no AS information for IGP. - - Prior to FTOS version 7.8.1.0, extended gateway data is not be exported because IP DA is not learned via BGP. Exported Exported 7.8.1.0 allows extended gateway information in cases where the source and destination IP addresses are learned by different routing protocols, and for cases where is source is reachable over ECMP. BGP BGP Exported Exported Extended gateway data is packed. sFlow | 919
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