Netgear XCM8806 - 8800 SERIES 6-SLOT CHASSIS SWITCH ユーザーズマニュアル

one global value for the entire switch. The switch software also allows you to set the 
individual port sampling rates, so you can fine-tune the sFlow statistics gathering. Per the 
RFC, sFlow sampling is done on ingress only.

You can enable sFlow and mirroring at the same time on the NETGEAR 8800.

There is no MIB support.

This section describes the following topics:

•     Sampling Mechanisms 

on page 229 

•     Configuring sFlow 

•     Additional sFlow Configuration Options 

•     sFlow Configuration Example 

•     Displaying sFlow Information 

For information on licensing, see 

.

Sampling Mechanisms

The NETGEAR 8800 switches support hardware-based sampling at a programmed interval.

With hardware-based sampling, the data path for a packet that traverses the switch does not 
require processing by the CPU. Fast path packets are handled entirely by ASICs and are 
forwarded at wire speed rate. 

With software-based sampling, the data path for the packets is still fast path; however, the 
switch copies all packets to the CPU for sampling (instead of only those that have been 
marked for sampling). Software sampling requires intensive CPU processing. 

Configuring sFlow

XCM8800 allows you to collect sFlow statistics on a per port basis. An agent, residing locally 
on the switch, sends data to a collector that resides on another machine. You configure the 
local agent, the address of the remote collector, and the ports of interest for sFlow statistics 
gathering. You can also modify default values for how frequently on average a sample is 
taken and the maximum number of samples allowed before throttling the sample gathering.

To configure sFlow on a switch, you must do the following tasks:

Configure the local agent

Configure the addresses of the remote collectors

Enable sFlow globally on the switch

Enable sFlow on the desired ports

Optionally, you may also change the default values of the following items: