How to make a mesh network using Xbee

i am trying to make a mesh network using xbee
i have 6 xbee
i wanna make a mesh network from a coord 3 Router and 2 End Device in api mode

What is the part number of the modules you have?

Have you read over http://knowledge.digi.com/articles/Knowledge_Base_Article/Range-Testing-with-a-ZigBee-Mesh-Network/?q=zigbee+range+test&l=en_US&fs=Search&pn=1

i am using S2CTH models

For the Coordinator, set CE to 1.

You don’t need to do anything for the routers as that is the default configuration.

For End nodes, set the SM command to a value greater than 0.