We have the need to load balance traffic between the US and South Africa. We have redundant links in South Africa that we need to utilize load balancing on specific traffic.
Currently we have the following setup for testing.
US side
Cisco 3640 2x FE interfaces (test network)
SA side
Cisco 6506 SUP720-3bxl (production network)
On the US Side we have SLB configured pointing to the real IP of the servers in SA. We also have 2 GRE tunnels between the single 6506 in SA to the single 3640 in the US.
We have routed 2x /30 for the tunnels and 2x /30 for secondary IP addresses on the specific server in SA.
We need to be able to have the SLB IP presented to the external host for data feeds and not the actual 2x /30 on the server in SA.
The 3640 config is below, IP addresses are not actual for obvious reasons.
ip slb serverfarm SANEWSSERVER
nat server
real 3.2.10.74
inservice
real 3.2.10.78
inservice
!
ip slb vserver SANEWSSERVER
virtual 3.2.10.44 tcp 0
serverfarm SANEWSSERVER
inservice
Any requests from 3.2.10.74 or 3.2.10.78 are not NAT’ed on the 3640 and are presented as the actual IP, therefore bypassing any return path via SLB.
Any suggestions?