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PostPosted: Thu Jan 05, 2012 10:06 pm 
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Can I use an 'match protocol' in a class-map to classify packets even if 'ip nbar protocol-discovery' hasn't been enabled on an interface?

My understanding was that classification would work regardless of this setting on the interface, but perhaps I'm wrong?


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PostPosted: Fri Jan 06, 2012 12:12 am 
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You're correct. You can use 'match protocol' in a class map without enabling anything else.

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PostPosted: Fri Jan 06, 2012 12:53 am 
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I asked a similar question a little while back. The "ip nbar protocol-discovery" command is used to enable the statistics gathering on the interface.


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PostPosted: Fri Jan 06, 2012 5:14 am 
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I thought when you use the command,

Match Protocol ( this enables NBAR to match the protocol you selected) you do not need to explicitly enable NBAR, its automatic.

Hope someone can confirm :)

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PostPosted: Fri Jan 06, 2012 5:31 am 
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sirsamon wrote:
I thought when you use the command,

Match Protocol ( this enables NBAR to match the protocol you selected) you do not need to explicitly enable NBAR, its automatic.

Hope someone can confirm :)


That was my understanding too.


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PostPosted: Fri Jan 06, 2012 6:13 am 
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NBAR is enabled, but NBAR protocol-discovery is not. Protocol discovery is a seperate command that is not needed when matching protocol traffic through NBAR

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PostPosted: Sat Jan 07, 2012 9:08 pm 
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Thanks. Seems we're all in agreement.


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