Load Balancing over Multiple Gateways: Difference between revisions

Latest revision as of 16:39, 18 January 2017

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-The typical situation where you got one router and want to connect to two ISPs:
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-Of course, you want to do load balancing. There are several ways how to do it. Depending on the particular situation, you may find one best suited for you.
-== Policy Routing based on Client IP Address ==
-If you have a number of hosts, you may group them by IP addresses. Then, send the traffic out through Gateway 1 or 2 depending on the source IP address.
-Let us assume we use for our workstations IP addresses from network 192.168.100.0/24. The IP addresses are assigned as follows:
-* 192.168.100.1-127 are used for Group A workstations
-* 192.168.100.128-253 are used for Group B workstations
-* 192.168.100.254 is ised for the router.
-All workstations have IP configuration with the IP address from the relevant group, they all have network mask 255.255.255.0, and the default gateway 192.168.100.254
-We will talk about DNS servers later.
-Next, we need to configure policy routing. We have workstations devided in groups, where we can reffer to them using subnet addresses:
-* Group A is 192.168.100.0/25
-* Group B is 192.168.100.128/25
-If you do not understand this, take the TCP/IP Basics course!
-We need to add two IP Firewall Mangle rules to mark the packets originated from Group A or B workstations. For Group A, start with specifying Chain '''forward''' and Src. Address '''192.168.100.0/25''':
-[[Image:dual_gw_20.jpg]]