Load balance between two ISP router

[wfqk]

Hi Please see below diagram. Router C and D are company edge router which are connected to ISP Att router A and router B respectively.  We want to do load balance between the two ISP when we reach the Server. On company side router D which is connected to router B. we setup higher local preference for inbound routes and lower AS number for outbound routes. Do you think this is better way for the purpose?

[Joseph W. Doherty]

For outbound, PfR can perform dynamic load balancing, over various routing protocol if using the PIRO or later variant.

PfR can also dynamically load balance inbound, but doing so it more complex. Ideally, the other side's egress can also be PfR managed.

[wfqk]

Thank you very much for your reply. it looks like PfR needs some additional device and redesign.

If these connections are bgp connection, we only use configuration like above first post mentioned using higher local preference for inbound and fewer AS number for outbound for one side, it should be work well? 

[Joseph W. Doherty]

For many Cisco routers, the only addition you may need is a IOS feature or feature license upgrade. For two routers, you probably don't need a "management" router.

PfR works well with BGP (in fact, earlier versions of PfR, then known as OER, only supported BGP or static routes).

Of outbound traffic, you shouldn't need to do anything but let PfR manage your routers (under the PfR policy you define). For inbound traffic, you can manage that using "traditional" BGP techniques, or allow PfR to manage that too. The latter, though, like some of the manual techniques, often requires cooperation from the other side (such as sending community strings).