Cannot get bandwidth with GRE encapsulation by sflow

Modified on 2025-06-10 21:53:56 +0200

Hi , I have use sflow to monitor my device, and found two things:

1.I cannot get bandwidth if the traffic is thought GRE tunnel.

2.The bandwidth information seem not inaccurate, I have compare with device interface and another flow collect software(NetFlow Analyzer by ManageEngine), the bandwidth volume of PRTG seem always more then about 10M, I also have add filter by inboundinterface ,outboundinterface and IP address.

May I know how can I get bandwidth with GRE encapsulation ? and how can I add filter for specific IP and interface let the bandwidth volume more accurate ?

Article Comments

Attention: This article is a record of a conversation with the Paessler support team. The information in this conversation is not updated to preserve the historical record. As a result, some of the information or recommendations in this conversation might be out of date.

Hi there,

Unfortunately, SFlow is only able to monitor UDP and TCP based traffic. This would explain why you see this low bandwidth usage. Additionally, this Site describes what filters can be used for the Flow and Traffic-Sniffer sensors.

Nov, 2016 - Permalink

Disclaimer:
The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.

Cannot get bandwidth with GRE encapsulation by sflow

Article CommentsAttention: This article is a record of a conversation with the Paessler support team. The information in this conversation is not updated to preserve the historical record. As a result, some of the information or recommendations in this conversation might be out of date.

Search

Attention

Related Articles

Article Comments

Attention: This article is a record of a conversation with the Paessler support team. The information in this conversation is not updated to preserve the historical record. As a result, some of the information or recommendations in this conversation might be out of date.