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How can i create a capture filter for CS4 traffic?

When I look at the captured traffic, I see the Differentiated Services Field: 0x80 (DSCP 0x20: Class Selector 4.

asked 28 Sep '11, 16:49

miler's gravatar image

miler
26114
accept rate: 100%

edited 30 Sep '11, 09:59


That worked perfectly, using ip[1] & 0xfc == 0x80 I was able to do perform a packet capture and only capture CS4 packets. Additionally, based on your response I was able to learn how to setup a capture filter for AF41: ip[1] & 0xfc == 0x88

I tested the AF41 filter and that worked as well.

Thanks for the solution.

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answered 30 Sep '11, 10:02

miler's gravatar image

miler
26114
accept rate: 100%

That would be ip[1] & 0xfc == 0x80

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answered 28 Sep '11, 23:42

Jaap's gravatar image

Jaap ♦
11.7k16101
accept rate: 14%

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question asked: 28 Sep '11, 16:49

question was seen: 4,533 times

last updated: 30 Sep '11, 10:02

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