Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 913
Enable and Disable sFlow, Enable and Disable on an Interface
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• FTOS exports all sFlow packets to the collector. A small sampling rate can equate to a large number of exported packets. A backoff mechanism will automatically be applied to reduce this amount. Some sampled packets may be dropped when the exported packet rate is high and the backoff mechanism is about to or is starting to take effect. The dropEvent counter, in the sFlow packet, will always be zero. • Community list and local preference fields are not filled in extended gateway element in sFlow datagram. • 802.1P source priority field is not filled in extended switch element in sFlow datagram. • Only Destination and Destination Peer AS number are packed in the dst-as-path field in extended gateway element • If packet being sampled is redirected using PBR (Policy-Based Routing), sFlow datagram may contain incorrect extended gateway/router information. • Source VLAN field in the extended switch element will not be packed in case of routed packet. • Destination VLAN field in the extended switch element will not be packed in case of Multicast packet. • On the C-Series, Layer 3 and Layer 2 multicast traffic is not collected with sFlow sampling. • On the S-Series, up to 700 packets can be sampled and processed per second. • On the C-Series up to 1000 packets can be sampled and processed per second. • On the E-Series, the maximum number of packets that can be sampled and processed per second is: - 7500 packets when no extended information packing is enabled. - 1000 packets when only extended-switch information packing is enabled. - 1600 packets when extended-router and/or extended-gateway information packing is enabled. Enable and Disable sFlow By default, sFlow is disabled globally on the system. To enable sFlow globally, use the sflow enable command in CONFIGURATION mode. Use the no version of this command to disable sFlow globally. Command Syntax [no] sflow enable Command Mode Usage CONFIGURATION Enable sFlow globally. Enable and Disable on an Interface By default, sFlow is disabled on all interfaces. To enable sFlow on a specific interface, use the sflow enable command in INTERFACE mode. Use the no version of this command to disable sFlow on an interface. This CLI is supported on physical ports and LAG ports. Command Syntax [no] sflow enable Command Mode Usage INTERFACE Enable sFlow on an interface. sFlow | 913
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