optimize the sysctl

[weizhoublue]

What would you like to be added?

for underlay network, it could optimize these values
// ? sysctl -w net.ipv4.neigh.default.gc_thresh1=0
// ? sysctl -w net.ipv4.neigh.default.gc_thresh2=512
(required) sysctl -w net.ipv4.neigh.default.gc_thresh3=8192 (in the low kernel, ipv4 and ipv6 share this)
net.ipv6.neigh.default.gc_thresh3 = 8192 ( in high kernel )
net.ipv4.conf.all.arp_notify =1
net.ipv4.ip_forward=1
net.ipv4.conf.all.forwarding=1
net.ipv6.conf.all.forwarding=1

they could be added to configmap and take effect in each node

Why is this needed?

No response

How to implement it (if possible)?

No response

Additional context

No response