Description of problem:

the static route for each host subnet will be removed after ovnkube pod restarted

 10.128.2.0/23                100.64.0.6 src-ip

**********Before restart ovnkube pod******************

ovnkube-node-pt62v
Defaulted container "ovn-controller" out of: ovn-controller, ovn-acl-logging, kube-rbac-proxy-node, kube-rbac-proxy-ovn-metrics, northd, nbdb, sbdb, ovnkube-controller, drop-icmp, kubecfg-setup (init)
IPv4 Routes
Route Table <main>:
               100.64.0.2                100.88.0.2 dst-ip
               100.64.0.3                100.88.0.3 dst-ip
               100.64.0.4                100.88.0.4 dst-ip
               100.64.0.5                100.88.0.5 dst-ip
               100.64.0.6                100.64.0.6 dst-ip
               100.64.0.7                100.88.0.7 dst-ip
            10.128.0.0/23                100.88.0.2 dst-ip
            10.129.0.0/23                100.88.0.3 dst-ip
            10.129.2.0/23                100.88.0.7 dst-ip
            10.130.0.0/23                100.88.0.4 dst-ip
            10.131.0.0/23                100.88.0.5 dst-ip
            10.128.2.0/23                100.64.0.6 src-ip
            10.128.0.0/14                100.64.0.6 src-ip

***********after recreated ovnkube pod*************

ovnkube-node-qkspb
Defaulted container "ovn-controller" out of: ovn-controller, ovn-acl-logging, kube-rbac-proxy-node, kube-rbac-proxy-ovn-metrics, northd, nbdb, sbdb, ovnkube-controller, drop-icmp, kubecfg-setup (init)
IPv4 Routes
Route Table <main>:
               100.64.0.2                100.88.0.2 dst-ip
               100.64.0.3                100.88.0.3 dst-ip
               100.64.0.4                100.88.0.4 dst-ip
               100.64.0.5                100.88.0.5 dst-ip
               100.64.0.6                100.64.0.6 dst-ip
               100.64.0.7                100.88.0.7 dst-ip
            10.128.0.0/23                100.88.0.2 dst-ip
            10.129.0.0/23                100.88.0.3 dst-ip
            10.129.2.0/23                100.88.0.7 dst-ip
            10.130.0.0/23                100.88.0.4 dst-ip
            10.131.0.0/23                100.88.0.5 dst-ip
            10.128.0.0/14                100.64.0.6 src-ip

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:

1. setup cluster with ovn-k plugin

2. check one of static route by rsh ovnkube pod

ovn-nbctl lr-route-list ovn_cluster_router

3.  restart the ovnkube pod

4. check the static route again. 

Actual results:

the static route `10.128.2.0/23                100.64.0.6 src-ip` was removed ** 

Expected results:

the static route `10.128.2.0/23                100.64.0.6 src-ip` should not be removed ** 

Additional info:

Not sure what's this route for? 

for N-S traffic of local pod, it can be taken over by `10.128.0.0/14                100.64.0.6 src-ip` if route is removed.  So N-S will not be affected. 

However at the beginning the route was added. it should not be removed after restarting ovnkube pod.