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IEEE1722:Decoding AVBTP packet

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I am using Wireshark to dissect a AVBTP packet i.e IEEE1722 standard with ether type = 0x88B5. I see that for Ethertype = 0x88B5, wireshark shows unknown ethertype. Do in need to do change some default setting in wireshark, for it to decode AVB packets correctly?

asked 20 Feb '17, 03:27

pkn's gravatar image

pkn
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One Answer:

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Hi, Looking in the sources AVBTP is supposed to have Ethertype:

#define ETHERTYPE_AVBTP         0x22F0

The ethertype you are using is:

define ETHERTYPE_EXPERIMENTAL_ETH1  0x88B5  /* IEEE Std 802 - Local Experimental Ethertype 1. */

which should show up as the name.

answered 20 Feb '17, 05:15

Anders's gravatar image

Anders ♦
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edited 20 Feb '17, 07:02

grahamb's gravatar image

grahamb ♦
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Thanks Graham! I believe i was looking at an older spec.

(20 Feb '17, 21:36) pkn

You might be able to use "Decode As..." to get 0x8885 to be decoded as AVBTP. (Perhaps they were using one of the local experimental Ethertypes before an official one was assigned.)

(20 Feb '17, 21:39) Guy Harris ♦♦