I have a problem with BGP, our company is an ISP-1 BGP with a small network of AS /28 and /29, added a new ISP-2 which provides us with its own unique AS /24 network. We can not simply switch all the service and customers need to do it gradually, when everything will be connected only going to use our new AS /24. All peers connection established. it possible with the default routing configuration to operate in both peers in Uplink-1, following routes 0.0.0.0/0 gateway 10.10.234.113, and 0.0.0.0/0 gateway routing mark =ISP-2 22.214.171.124?. I can not switch the entire internal network to the new / 24, it is necessary to do so gradually. Is there solution for my problem?
I hope you understood my question, thank you and sorry for bad English.