> tc is a linux tool to create network classes that you can > route/mangle/prioritize, it's not Squid specific and won't work with > any other OS, but i used it once in a setup to route TCP_REFRESH_HIT > objects to a different (much faster link), so they can have a faster > If-Modified-Since request/reply. pretty tricky and complex Tc is traffic control from iproute2. Iproute2 replaces the ifconfig and route commands with the ip and tc commands. Iproute2 offers more functionality than the ifconfig/route, especially for QoS via tc.