---
description: >-
  Packet deduplication is a feature used to identify and eliminate duplicate
  network packets, improving network efficiency and reducing redundant data
  processing. It works by comparing incoming packets
---

# Configuring Deduplication

To configure and manage packet deduplication of ASN via the **FlowVision GUI**, navigate to:

&#x20;          **Configuration > ASN > Deduplication**

**Deduplication Configuration Options:**

1. **Packet Deduplication**: Toggle this option to enable/disable  deduplication.
2.  Selecting the Packet Source, you can choose one of the following packet sources:

    1. **Full Packet**: Deduplication is applied to the entire packet.
    2. **Routed Packet**: In real time, the packets can be routed across multiple devices/hops. Hence there are chances the duplicate packets can be received to monitoring fabric with different Src MAC/TTL/Checksum fields.&#x20;


3.  **Anchor :** Determines the starting position for packet comparison during deduplication. Available options:

    1. **Packet Start** – Begins deduplication from the start of the packet.
    2. **L3 Start** – Uses the Layer 3 (network layer) header as the reference point.
    3. **L4 Start** – Anchors deduplication at the Layer 4 (transport layer) header.
    4. **L4 Payload** – Focuses on the Layer 4 payload for identifying duplicates.


4. **Offset**: Define the byte offset from the anchor point where deduplication begins (**14 to 128 bytes**).
5. **Window Size**: The time interval within which duplicate packets will be identified. Available options: **2,4,6 & 8ms**.
6. **Deduplication Interface**: Select the network interface where deduplication should be applied.

Below image show packet deduplication for full packet

<figure><img src="https://content.gitbook.com/content/YfL8XRgjJPMQgyU7TZUv/blobs/nFzAZvTITcChitLS3pU2/Screenshot_10.png" alt=""><figcaption><p>Deduplication For Full Packet</p></figcaption></figure>

Below image show the Packet Deduplication for Routed Packet

<div align="right"><figure><img src="https://content.gitbook.com/content/YfL8XRgjJPMQgyU7TZUv/blobs/PLJEfeU2Euake41HCfPo/Screenshot_11.png" alt=""><figcaption><p>Deduplication for Routed Packet</p></figcaption></figure></div>



When the **Routed Packet** option is selected, users can exclude the following fields from packet deduplication:

* **Ignore IPv4 TTL**: Ignores changes in the TTL (Time-To-Live) field for IPv4 packets.
* **Ignore L2 Header**: Excludes Layer 2 (Ethernet) header fields from deduplication.
* **Ignore IPv4 Checksum**: Ignores differences in IPv4 checksums when comparing packets.





{% hint style="info" %}
* Packet drop for a few milliseconds is expected during configuration changes as the deduplication module reinitializes.
* The deduplication feature operates in DC mode.
* The maximum supported speed per port is 50Gbps.
{% endhint %}

