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Why can't the Cisco ASA 5520 do QoS in transparent mode?

According to the ASA configuration guide, the Cisco ASA 5520 does not support QoS while running in transparent mode.

Why?

Does this mean that the firewall will not pass existing QoS information while in transparent mode or that the firewall will not add QoS info to previously untagged traffic?
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c-h-r-i-s-t-o-p-h
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c-h-r-i-s-t-o-p-h
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1 Solution
 
MikeKaneCommented:
A simple way to tell is to check for the existence of Program Files (x86).    It that exists along with normal 'program files' then its 64 bit.


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c-h-r-i-s-t-o-p-hAuthor Commented:
You may have posted this in the wrong thread.
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FrabbleCommented:
In transparent mode there shouldn't be a requirement to support QoS.
In either mode traffic tags are kept and even in routed mode you cannot re-mark the traffic.
I expect the other options of policing and traffic shaping don't figure since you're bridging the outside and inside and it's assumed the connections are the same speed, unlike routed mode where the link speeds may be different.
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MikeKaneCommented:
Opps - Yes I did post incorrectly.... sorry about that.  

And Frabbie is correct BTW.
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c-h-r-i-s-t-o-p-hAuthor Commented:
Thanks for the sanity check. I wanted to make sure that transparent mode wouldn't strip existing QoS tags.
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