One router, two ISPs, Dns external location

[IOS_support]

Setting up an external location up for dual WAM with a change to the primary ISP. Currently all PCs have a 13.1 address with DnS as 192.168.11.18 or 192.168.11.19.... this is the internal IP for DNS.... placed one Zero client in new ISP modem and it cannot communicate with DNS server... 

What would be a good suggestion..

[blau grana]

Hello,

From you minimalistic description is little bit difficult to imagine real scenario. Could you be little more specific, maybe some sketch would help.

Best Regards

Please rate all helpful posts and close solved questions

[IOS_support]

Sorry; thank you for the reply. It's been awhile since I've been on here and I am hoping my description below will work.

1. We have a current ISP; they manage the router/switch at all sites.  This questions is in relation to a satellite site; that we are adding the DUAL WAN router to.

The primary and alternate DNS is 5.27 and 5.28  respectively and the ISP has DHCP managed through their Router; giving the internal IP Range of 192.168.9.1 - 200.....  And client machines have a 'static' IP....

2. I need to setup the Primary ISP as 'another' ISP and try to keep the client machines from going down and keep the 9.1-200 still active as well as the DNS structure.

ISP A = Current ISP does DHCP 

ISP B = Will take over as PRIMARY ISP w/ CISCO Router.