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Uplink Balancing Problem

Hello,

I have a problem with uplink balancing. This is a simple drawing of the configuration:

Little description:

We have two Internet-Links, Cable, with 8 IPs and a static LTE.

Cable-Switch is only for splitting Cable-IPs.

We work locally and remotely on a terminal server (which is what VPN-Router is for).

"Local Internet" is supplied by the Sophos, and is the network 10.10.10.0/24. The VPN-Router is also part of this network.

VPN-Router uses two internet uplinks two create two VPN-tunnels, one over Cable-Internet (WAN1) and one over LTE (WAN2). VPN-Router manages failover itself, so it needs two active links. It is not configured by us, but comes preconfigured. All we had to give them is a gateway address for the 2nd uplink (WAN2).

 

Current configuration:

Uplink Balancing:

Active Interfaces: LTE

Standby Interfaces: DSL

In this configuration the VPN-Router has no problems. However the switch between the links takes a while, causing some other problems locally (with another VPNs).

 

So I tried following configuration:

Active Interfaces: LTE (Weight 100) and DSL (Weight 0)

This configuration made for way better balancing, so that if LTE went dead, Cable took over almost instantly - locally it works better than using Standby.

 

However, and this is the actual problem:

WAN2 on the VPN-Router doesn't seem to work properly with this configuration. When I switch to the new configuration with two active interfaces, 100/0 balancing, all is working fine for a while, but only until LTE-Link drops. After that, VPN-Router doesn't connect the 2nd VPN over WAN2 any more. The only way to make it connect again is to reset the configuration to Active/Standby Interface.

 

I hope I explained this as good as possible and hope someone can help.

Thank you.



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