The output of "tc -s class show dev ppp0" shows current flow rates like "rate 2009bit 3pps". The "bit" text should read "byte". The number given is Bytes per second (Bps), not bps. This is obvious from empirical study as well as in the source: pkt_sched.h : struct tc_stats __u32 bps; /* Current flow byte rate */ tc_qdisc.c : print_tcstats_attr fprintf(fp, "%s ", sprint_rate(st.bps, b1)); (st is struct tc_stats and so bps is BYTES as per comment above) tc_util.c : print_rate double tmp = (double)rate*8; (is bogus since it's already bytes, by are we * 8??) snprintf(buf, len, "%ubit", rate); (rate unmodified is bytes, not bits, and why do we use tmp for the other snprintfs but not here?) The easy solution is change print_rate to operate on rate in bytes, not do any *8 and change the literal strings to reflect this fact. Please see this bug also at: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=165544