I found it in sources. When fwmark has no subfilters then maps fwmark directly into classid. So that 0x0002010 is classid 2:10 On Fri, 1 Mar 2002, Michael T. Babcock wrote: > On Fri, Mar 01, 2002 at 09:03:30AM +0100, Martin Devera wrote: > > By the way, you can attach fw_mark classifier WITHOUT specifying > > any marks and then it will try to directly map mark to class numbers. > > You can then specify class numbers directly in ip{chains,tables} ;) > > I saw this discussed here on the list before and when I tried to find > more details I came up dry -- do you happen to remember/know the mapping?