ERSPAN Installation: Difference between revisions

ERSPAN Installation (view source)

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 === What is the '''ERSPAN''' mode ===
-The Allegro Network Multimeter works in the '''mirror port mode''' as a traffic receiving device that . It will '''NOT''' send any traffic on the measurement Ethernet ports.
+The '''ERSPAN''' is an advanced switch feature that encapsulates mirrored traffic into an IP and GRE packet. The full method is described in the RFC draft [https://tools.ietf.org/html/draft-foschiano-erspan-03 https://tools.ietf.org/html/draft-foschiano-erspan-03].
+The advantage of the '''ERSPAN''' mode is that it can be routed via IP and the ERSPAN generator can be at a different location than the Allegro network Multimeter. This allows very simple captures of a low-bandwidth remote device when.
 === How should the '''ERSPAN''' mode be used ===
-The '''ERSPAN''' quality depends on the switch performance and the bandwidth and latency between the switch and the Allegro.
+The '''ERSPAN''' quality depends on the switch performance and the bandwidth and latency between the switch and the Allegro. It will also add substantial load to the IP networks and can generate a packet storm when the ERSPAN packets themself are mirrored again into the ERSPAN tunnel.
+See [[#Limitations]] for more details.
+=== Where can I configure the '''ERSPAN''' mode ===
+Please refer to you switch manual how to set up a switch ERSPAN channel.
+The '''ERSPAN''' mode can be configured at '''Settings''' → '''Global Settings''' → '''Expert Settings''' → '''L3 Tunnel mode'''.
+[[File:L3 tunnel mode.png|800px]]
+You can enable the ERSPAN mode in parallel to the [[In-Line Installation]] or [[Mirror Port, TAP and Packet Broker Installation]] for one or multiple ports. Please be aware that the ERSPAN cannot work in parallel with the bridge mode for such a port.
-The data plane ports of the Allegro should be connected in the '''mirror port mode''' to one or multiple mirror ports on a switch. The management port of the Allegro shall be connected to a regular switch port or to the out-of-band management switch.
-See [[#Limitations]] for more details.
-=== Where can I configure the '''Mirror Port Mode''' ===
-Please refer to you switch manual how to set up a switch port as mirror port.
-The '''Mirror Port Mode''' for the Allegro can be configured at '''Settings''' → '''Global Settings''' → '''Packet processing mode'''. The Interfaces can be configured to '''Bridge Mode''' or '''Sink Mode'''. The '''Sink Mode''' will disable the packet forwarding and sending on the Ethernet ports. Please switch to '''Sink Mode''' and save the settings at the bottom of the page
-[[File:Sink mode.png|800px]]
 == Data Plane Ports of Allegro Network Multimeters ==