I am sorry if i didnt polite to you. i am full respectful to person like you as a teacher.but the english is not my first language, so may be i cant write as plolie as a nation.i am so sorry about that.best regards.yasaman

I cant accept your answer, because in cisco2960 datasheet you can see that it is possible to limit bandwidth and the command is :srr-queue bandwidth limit weightthis command limit bandwidth up to 10mbpsbut my problem is :how to limit a port to 128kbp...