BizLink RM-826-Q25-WD, User Manual, Page: 29 / 48

In most cases, you will have more than one Rule defined to handle the traffic from your network.
Some will be for specific data packets while others will be more general. When the Load
Balancing System is using Rules to match to a data packet it starts at the top of the Rules list and
works its way down until a match is made.
Because of this, the Rules that deal with specific data packets must be at the top of the list with
the more general Rules below them. Otherwise, a match will be made with a general rule and the
specific Rulle will never be used. The more specific the Rule is then the higher up the Rule list it
must be.
Rules and IPSet
In the Rule definition there is an IPSet entry that needs some explanation. IPSet is used in place
of the Destination Address and enables using URLs rather than an IP Address for the
Destination. This is required when matching to data packets for sites such as Netflix or
YouTube. These sites have hundreds of IP Addresses associated with their URL so you never
know the exact IP Address you are working with.
See DNSmasq-IPset for details on how to create an IPSet that can be used in the Rules section.
Creating the Examples
After having a closer look at the sections of the Load Balancing System, we are ready to
implement our system. We will look at what is needed to define the exmaples previously shown
above.
Example 1
All traffic goes through the Wifi Hotspot (WWAN) unless that source is disconnected. In that
case all traffic goes through Modem 1. When the Wifi Hotspot is connected again return to using
it rather than Modem 1.
•
Action : failover
•
Destination IP Address : 0.0.0.0/0 (this defines all destination addresses. ie. all traffic)
•
Primary Internet : Wifi Hotspot (WWAN).
•
Secondary Internet : Modem 1 (WAN1)
In this example we use 2 Internet sources so we will need 2 Members.
Member
Name
Interface Metric Weight
Ex1_hotspot WWAN 1 1
Ex1_modem1 WAN1 2 1