Packet loss

Hello everyone,

The USG6630 serves as the enterprise egress and connects to the ONTs provided by ISP-1 and ISP-2. Static routes are used to implement load balancing.

The configuration is as follows:

firewall zone trust

 set priority 85  

 add interface GigabitEthernet1/0/2

#

firewall zone untrust

 set priority 5

 add interface GigabitEthernet1/0/0

 add interface GigabitEthernet1/0/1

#

nat-policy

 rule name isp

  source-zone trust

  destination-zone untrust

  action nat easy-ip

#

ip route-static 0.0.0.0 0.0.0.0 192.168.1.1

ip route-static 0.0.0.0 0.0.0.0 192.168.2.1

When the upstream link of ISP-1 ONT-1 is faulty, some packets are lost. Check the routing table of the USG6630. It is found that the default route still takes effect when the upstream link of the ONT corresponding to isp1 is faulty. This is because the physical interface G1/0/0 is Up and the next hop 192.168.1.1 is reachable. As a result, some traffic is still transmitted through the isp1 link, and packet loss occurs.

What should I do about this? Please help me! Thank you!