Hello

I have Router CRS125 and two AP RB951 and i need to build on AP's two wifi sites normal and guest. How i can do it ????

Thx

Kindly supply us with more information

You want each AP to have both the Normal SSID and the Guest SSID at the same time on different frequencies/channels, or you want each AP to take care of a different SSID?
What is the router's role in your scenario?
Will both APs and the router be on the same subnet?

If you describe your scenario it will help.

Please start by reading the pages linked from here: http://wiki.mikrotik.com/wiki/Category:Wireless

If you still have trouble, come back and ask us about the specific item which is giving you trouble.