Trunk configuration

Gel

I have two WANs with 200MB Full each. How do I make it so that when WAN1 goes down, WAN2 goes up automatically?
Do I need to configure something in routing besides creating the trunk?
How do I create Trunk so it works this way?

I'm using the USG FLEX 200

Thanks

zyman2008

Hi @Gel ,

Just setup a Trunk and set it as default.

1. Create a new Trunk. Set the primary link ac active mode and backup link as passive mode.

2. Select this Trunk as default

Gel

@zyman2008

Thanks for the information. One more thing: In my corporate network I created a routing so that the internal LAN1 leaves via WAN1. With this change in the trunk that you told me about, what would this runting look like? Do I have to delete it? Or should I do some other configuration so that it works the way I said, if WAN1 goes down, WAN2 goes up and we don't run out of internet?

Thank you very much for the help.

valerio_vanni

Yes, this way LAN1 can go out only on WAN1.

You should create another policy route for LAN1.

#1 pointing to WAN1

#2 pointing to WAN2

Both with "healthy check". So, if WAN1 is working, #1 is used. When WAN1 is down, #1 gets disabled and #2 is used.

zyman2008

https://community.zyxel.com/en/discussion/comment/70739#Comment_70739

Hi @Gel,

Change the next-hop of this policy route to the new Trunk.

Note: you need to enable and setup connectivity check in the primary interface.

What valerio_vanni mentioned is also a solution.

My preference is to use trunk to set up. It makes the policy route table cleaner. Too many rules often make it difficult for me to debug.

Gel

would it be like that? Instead of interface, put configured trunk

Would this be a second option?

valerio_vanni

https://community.zyxel.com/en/discussion/comment/70827#Comment_70827

Yes, trunk method is simpler than mine.

You can SNAT to outgoing interfaces, I use the other method because I have to SNAT to different addresses.

Gel

Thank you everyone for the information. Next Saturday I will make the changes and see how the network behaves. Once again thank you all very much.