2 ISP Link

[Aboonaim Golandaz]

Hi, We have 2 ISP link and we want to divert half half traffic from both the link through a proxy. How to achieve that

[Migration User]

Hi Aboo,

 

                 Proxy don't have an direct ISP link balancing capacity. If customer is terminating the ISP links on a Router which can do link routing based on source IP address, we can do a trick on proxy side to make this work. Steps below

 

1) Add 2 extra VIPs in the Proxy from the same range as its Physical IP

2) Add a reflect IP rule in the Forwarding layer by keeping half of the subnet to use VIP-1. Another rule to send traffic with the other VIP. Example below

Lets take the entire customer subnet to be 10.1.2.0/24. Split this into 2 equal parts of 10.1.2.0/25 and 10.1.2.128/25.

Forward Rules should be as below

3) Now on the Router (or ISP Link terminator) add rule to use Link 1 when the source IP is seen as VIP1. Do the same rule for Link 2 when source is VIP2.

Note: If router supports, do add a default rule in it to route all traffic through one link, if the other is found to be down.