We have 2 offsite locations site A and site B which are connected to MPLS cloud from where it connects to two data centres at onsite.Offshore sites has bandwidth of 512 Kbps each.These sites acts as backup to each other.We have a local loop connecting ths 2 sites.
Now we have moved our users from siteA to siteB and we wanted to utilize the MPLS link at siteB for siteA traffic.
we want both links at site A to be active-active.
attached the connecivity diagram.
our LAN is behind a pix firewall and two routers are in HSRP.Default static route in pix points to the virtual IP.
The MPLS routers are managed by service provider.
Please advice how we acheive the load balancing with minimal changes in this scenario.