We have 3 qty Cisco 2504 WLCs. 2 qty are configured as redundant. Another 1 WLC runs separately. Is there any method for All 3 WLCs configured as the Same availability group and WLC as primary, secondary, and Tertiary? 

The customer has a Cisco RV042-EU Dual WAN VPN Router. The RV340-K9-G5 is a compatible model for RV042-EU. but Cisco has announced the RV340-K9-G5 model end-of-sale too.  Could you please someone can suggest a compatible model for RV340-K9-G5?