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Re: "mask" in tc commands
> can anyone tell me what os the signification of the keyword "mask" in tc commands
> and why it is there?
mask is used in different contexts and it has different meanings.
when you use "mask" in a dsmark qdisc, it has to do with the TOS byte.
You can read Almesberger's paper on Diffserv over Linux where it is all
explained. I give you here a brief summary. For every class in a dsmark
qdisc, you specify a "mask" and a "value". The formula is as follows:
TOS of packet when dequeued = (TOS of packet when enqueued * mask ) +
if you use "mask" in a filter, it has a completely different meaning.
Hope it helped
> is there any thing to have with the tos byte?
> are all the values possible to set for the tos byte in Linux?
> please help
> and thanks tu everybody