I was updated kernel from 2.4.22 to 2.4.23 and tc (Traffic Control from iproute2 toolkit) tools can't correctly determine default (IMHO pfifo_fast) qdisc on interface:
# tc/tc qdisc ls dev ppp0
qdisc pfifo_fast 0: [Unknown qdisc, optlen=20]
but, if I assign f.e. cbq qdisc for some device all show correctly:
# tc/tc qdisc ls dev ppp1
qdisc tbf 8009: rate 32Kbit burst 10Kb lat 1.5s
qdisc cbq 66: rate 10Mbit (bounded,isolated) prio no-transmit
what can I do to fix this?