I am trying to use 2 isps in the same network with pppoe dial up setup

Please help me guys.....................!

Hi all, I am trying to configure 2 different mikrotik for 2 different isps (say ispA and ispB) in a single network , i have configured 2 different pppoe server names for both, my network has no dhcp server configured. The issue is sometimes clients from A isp mikrotik take long time to authenticate ...