Handle Large Flows in Application Filtering Intelligence
Application Filtering Intelligence detects and handles the large flows in the traffic. This feature helps to optimize the performance of the following GigaSMART cards when large flows are present in the traffic:
In tunneled traffic, this feature detects the large flows , but it doesn’t involve in optimizing the performance of the GigaSMART engine.
To detect the large flows (elephant flows) in the traffic, do the following in the GigaVUE-FM:
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1.
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On the left navigation pane, click on  , go to Physical > Nodes. |
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2.
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Click on the required Cluster ID. |
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3.
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From the device view, go to System > GigaSMART > GigaSMART Groups. |
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4.
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Click New to create a new GigaSMART Group for detecting the traffic with elephant flow. |
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a.
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Enter the name of the group in the Alias field. |
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b.
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Select the ports in the Port List. |
You can also include the detection of elephant flow in a existing GigaSMART group.
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5.
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In the GigaSMART Parameters > Eflow section, enable the Eflow checkbox to enable the detection of elephant flow. |
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6.
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Enable the Log check box to print the parameters of the large flows (elephant flows) including the 5-tuple information into the GigaSMART logs. |
Note: It is recommended to disable the check box after collecting the required parameters.
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7.
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Enter the following parameters to identify the large flows : |
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a.
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Interval — The interval within which packet-count and packet-ratio for a traffic flow are examined. The interval should be specified in seconds. The range lies between 0 to 3600. Specify the interval as 0 to ignore this parameter. The default value is 2 secs. |
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b.
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Packet Count— Enter the maximum number of packets to be received by the flow within the given interval to categorize the flow as an elephant flow. The default value is 10,000. |
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c.
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Packet Ratio — Enter the packet ratio, which is the percentage concentration of the packets in the flow to the packets seen overall by the gsgroup. Specify 0 to ignore this parameter. The default value is 0. |
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8.
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You can modify the Resource Buffer settings to scale the internal packet buffers in the GigaSMART engine, which helps reduce ingress drops caused by large flows From the device view, go to System > GigaSMART > GigaSMART Groups> GigaSMART Parameters > Resource Buffer section, select the Enable Resource Buffer Packet check box and provide packet buffer scale in the Resource Packet Buffer scale field from 1-2 scale. The default value is 1. By default for scale 1, the default buffers are allocated for each platform.
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Note: A packet buffer scale of 2 is only applicable to the GigaVUE‑HC3 Gen 2 device. When set to 2, twice the number of buffers are allocated. Make sure to reboot the card after applying any configurations.
Refer to gsgroup command in GigaVUE-OS CLI Reference Guide to configure through GigaVUE-OS CLI
You can handle the large flows in Application Filtering Intelligence Solution by using the gsgroup created to detect the flow.
Refer to theGigaVUE-OS CLI Reference Guide to learn about the commands that must be configured to detect and handle the large flow of traffic.
