High Traffic on Port 2380 (etcd over kubernetes)

[emadct]

Hi Everyone,

I have a 3-node kubernetes cluster, with internal ETCD installed on that (TLS connection). The question is that, the traffic between etcd nodes on port 2380 and 2379 is too high (200 packets in second). Is it normal ?
There are no pods, no deployments, no other resources on the cluster, and its completely pure. Calico CNI is installed, and I think the traffic is just for RAFT, Internal Sync and ... between ETCD nodes and not about changing keys, or polling them.
Is there any configuration to decrease the traffic between nodes ?

I just add following lines to etcd yaml file:

--heartbeat-interval=3000
--election-timeout=15000

But there are still traffic (high traffic) between ETCD nodes.

Thank you all