Hi, All: I am tring to use STP function on bridge device that refer the BRIDGE-STP-HOWTO. And I use PING program to test it from PC1 to PC2. But the forward function is become too long when bridge topology change. How can I tuning the STP to make client connect to another again faster? I have been use follow command. But it seen not this issue. Bcause, if I run " arp -d " on PC1 and the reply will be immediately. Or if I run one ping from PC3 to PC2 (PC3 didn't have PC2 arp entry). The PC1 will also get reply immediately. Does any one know what's problem? /usr/sbin/brctl setbridgeprio mybr 0 /usr/sbin/brctl sethello mybr 1 /usr/sbin/brctl setmaxage mybr 4 /usr/sbin/brctl setfd mybr 4 /usr/sbin/brctl stp mybr on Two bridge machines are install with linux-2.4.26 and use the ebtables patch (ebtables-brnf-6-vs-2.4.26). Network environment: PC1 --------- Bridge 1 ---- PC2 |----- Bridge 2 ---| PC3 ---- Very thank for your help Regards, Matt.