Load Balancer

Unanswered Question
Nov 11th, 2009

can cisco 1800 series router be used for load balancing router to connect 2 hub/switch without changing the given ip address by the ISP?

I have this problem too.
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Giuseppe Larosa Wed, 11/11/2009 - 09:45

Hello Sherwin,

using NAT you can implement a "poor man " load balancer

see

http://www.cisco.com/en/US/tech/tk648/tk361/technologies_configuration_example09186a0080950834.shtml

or better for you :

Avoiding Server Overload Using Load Balancing: Example

In the following example, the goal is to define a virtual address, connections to which are distributed among a set of real hosts. The pool defines the addresses of the real hosts. The access list defines the virtual address. If a translation does not already exist, TCP packets from serial interface 0 (the outside interface) whose destination matches the access list are translated to an address from the pool.

ip nat pool real-hosts 192.168.15.2 192.168.15.15 prefix-length 28 type rotary

ip nat inside destination list 2 pool real-hosts

!

interface serial 0

ip address 192.168.15.129 255.255.255.240

ip nat outside

!

interface ethernet 0

ip address 192.168.15.17 255.255.255.240

ip nat inside

!

access-list 2 permit 192.168.15.1

see

http://www.cisco.com/en/US/docs/ios/ipaddr/configuration/guide/iadnat_addr_consv_ps6350_TSD_Products_Configuration_Guide_Chapter.html#wp1073492

Hope to help

Giuseppe

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