Hello there, : The device is 100M. : How to limit it to 1M? Maybe you wish to use IMQ? [1] Are you trying to simulate a 1MBit link? If not IMQ, is this a router, or an endstation? If a router, using HTB: tc qdisc add dev $OUTSIDE root handle 1: htb default 1 tc class add dev $OUTSIDE parent 1: classid 1:1 htb rate 1Mbit tc qdisc add dev $INSIDE root handle 1: htb default 1 tc class add dev $INSIDE parent 1: classid 1:1 htb rate 1Mbit If an endstation, using HTB and policing: tc qdisc add dev $OUTSIDE ingress tc filter add dev $OUTSIDE parent ffff: protocol ip \ u32 match ip src 0.0.0.0/0 flowid :1 \ police rate 1Mbit mtu 12k burst 10k drop tc qdisc add dev $OUTSIDE handle 1: htb default 1 tc class add dev $OUTSIDE parent 1: classid 1:1 htb rate 1Mbit -Martin [1] http://trash.net/~kaber/imq/ -- Martin A. Brown --- SecurePipe, Inc. --- mabrown@xxxxxxxxxxxxxx