Changelog for ZPH TOS patch of 27-Apr-2004  

Details

You can now use different TOS values for cache HITs produced locally and those by siblings and parent caches.
This is the final set of available options:

zph_tos_local (integer)
Allows you to select a TOS/Diffserv value to mark local hits.
Default: 0 (disabled)
zph_tos_peer (integer) Allows you to select a TOS/Diffserv value to mark peer hits (siblings and parent).
Default: 0 (disabled)
zph_tos_parent (on|off)

Set this to off if you want only sibling hits to be marked.
If set to on (default), parent hits are being marked too.
Default: on

Please, take a look at SQUID's tcp_outgoing_tos parameter for details about valid TOS values.

Credits

Evgeni Gechev is again solely "responsible" for these improvements. Cheers !!!