how to use doccd with different ios versions

'morning everybody..

I have this doubt and I hope someone could clear it for me..

I'm searching in the doccd the conf guide regarding "link fragmentation and
interleaving".

Since I wasn't able to find it I've used google: site:cisco.com link
fragmentation interleaving configuration guide 12.4

and I've discovered that the conf guide is under ios vers 12.2.

If I do search on 12.4 I don't find it.

If I use this start page:
http://www.cisco.com/cisco/web/psa/default.htmland then I choose
Technology, Qos, Qos Link Efficiency Mechanims, MLPPP
then I fall down again on 12.2

Am I suppose to use and browse also ios version < 12.4 ? If so It would
take a lot of time, isn't ? (for sure not 10 seconds per topic as should
be).

then, what is the REAL start page of doccd and the one I should use for
convenience? this one http://www.cisco.com/cisco/web/psa/default.html or
this one?

http://www.cisco.com/en/US/products/ps6441/tsd_products_support_series_home.h
tml?

thanks in advance.

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ccie99999
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