BGP Load Balancing Inwards

Darren Green · Guest

Hi All,

I have been asked to deploy a new WAN. One of the key sites has 2 x
links into MPLS (separate routers). The solution sold uses GLBP outbound
on the LAN side and BGP on the WAN side.

My issue - the site with 2 x links uses a SAP cluster. All remote sites
wanting to hit this cluster will route to a single IP address. I had
provisionally planned to advertise different host addresses /32 (for
separate SAP servers) down each link as well as the LAN subnet. This
would provide a rough form of inbound load balancing i.e. one link
inbound to SAP Server 1 and another to SAP Server 2.

I need to think about other methods of inbound load balancing. Looks
like I may have to go with RIPv2 or something else that the carrier
supports. I can't see the carrier wanting to add policy routing to their
devices policy routing traffic from one source down 1 x link and another
source down another links. Also seems to me that theres no way of
getting the traffic to route symmetrically here.

NB The only servers at the site are the SAP boxes.

Any ideas ?

Regards

Darren