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Juniper mirror encapsulation (jmirror)

This file tries to help you add a new protocol to the wiki. Edit anything as appropriate to the specific protocol and replace any appearance of PROTO/proto/protofirstletter by your protocols name (and remove this text line before saving!).

XXX - add a brief PROTO description here

Juniper switches can be configured to mirror packets to another endpoint using UDP as a transport.

XXX - add some details on how this is done?


XXX - add a brief description of PROTO history

Protocol dependencies

Example traffic

XXX - Add example decoded traffic for this protocol here (as plain text or Wireshark screenshot).


The PROTO dissector is (fully functional, partially functional, not existing, ... whatever the current state is). Also add info of additional Wireshark features where appropriate, like special statistics of this protocol.

Preference Settings

The jmirror dissector has a UDP port number preference to tell it which on which UDP port to listen for jmirror packets.

Example capture file

XXX - Add a simple example capture file to the SampleCaptures page and link from here (see below). Keep this file short, it's also a good idea to gzip it to make it even smaller, as Wireshark can open gzipped files automatically.

Display Filter

A complete list of jmirror display filter fields can be found in the display filter reference

Capture Filter

You cannot directly filter jmirror protocols while capturing. However, if you know the UDP port used (see above), you can filter on that one.