The default IP of the ER1000 is 192.168.45.1 the default IP of the ER2000 & CR48 series is 192.168.71.1. 
The default username is "root" and the password is based on the model:

ER1000:  CioER1000!

ER2500:  CioER2500!

CR48NA: cio@123$