Sonicwall TZ570 - Split Upload and download over multiple WAN IPs

HebronICT

Hi, 

Is it possible to spread the upload and download traffic over two wanip's / subnets. 

I would like the following situation: 

- Upload traffic via X1 

- Download traffic via X2 

Is this possible? Since we are dealing with different internet speeds? 😀

Ajishlal

@HebronICT

Yes its possible. First you would have to make the X2 as your primary interface in Failover & LB ( Do not add X1 in the LB) so it will be use for your download traffic.

Once you done the above step, Create a PBR for uploading traffic and choose your X1 interface.

For example see the below screen shot for the PBR.

https://www.sonicwall.com/support/knowledge-base/how-can-i-route-some-or-all-wan-traffic-through-a-backup-wan/170505736395208/

TKWITS

This doesnt make any logical sense.

In a standard setup with NAT, any traffic going out of a WAN interface will have the interface IP address as the source. That means any reply traffic will be destined to the same WAN interface. This is how IP works.

While there is Asymmetric Routing, I don't think it'll accomplish what it sounds like you want to accomplish.

https://www.sonicwall.com/support/technical-documentation/docs/sonicos-7-0-0-0-system/Content/Interfaces/interfaces-l2-bridged-mode-asymmetric-routing.htm/