Docker(swarm) container failing to cummincate for some port in different subnet,but works in same subnet

While deploying docker etcd container on nodes on the different subnet in different datacentre.getting the below-mentioned error.

2019-02-21 16:52:42.506314 I | raft: b8b747c74aaea686 is starting a new election at term 928
2019-02-21 16:52:42.506344 I | raft: b8b747c74aaea686 became candidate at term 929
2019-02-21 16:52:42.506353 I | raft: b8b747c74aaea686 received MsgVoteResp from b8b747c74aaea686 at term 929
2019-02-21 16:52:42.506361 I | raft: b8b747c74aaea686 [logterm: 1, index: 3] sent MsgVote request to b3504381e8ba3cb at term 929
2019-02-21 16:52:42.506367 I | raft: b8b747c74aaea686 [logterm: 1, index: 3] sent MsgVote request to f572fdfc5cb68406 at term 929
2019-02-21 16:52:43.158372 W | rafthttp: health check for peer b3504381e8ba3cb could not connect: dial tcp 10.0.2.81:2380: i/o timeout
2019-02-21 16:52:43.159658 W | rafthttp: health check for peer f572fdfc5cb68406 could not connect: dial tcp 10.0.2.83:2380: i/o timeout

docker version:
[user-docker@f1cloud2201 ~]$ docker version
Client:
Version: 17.12.0-ce
API version: 1.35
Go version: go1.9.2
Git commit: c97c6d6
Built: Wed Dec 27 20:10:14 2017
OS/Arch: linux/amd64

Server:
Engine:
Version: 17.12.0-ce
API version: 1.35 (minimum version 1.12)
Go version: go1.9.2
Git commit: c97c6d6
Built: Wed Dec 27 20:12:46 2017
OS/Arch: linux/amd64
Experimental: true

Followed all the pre-requieste of docker swarm port constraints.
telnet and nc also working

etcdc compose file:

version: '3'
services:
etcd01:
image: quay.io/coreos/etcd
ports:
- 2379
- 4001
- 2380
networks:
- dbs1
volumes:
- etcd01:/etcd_data
deploy:
placement:
constraints:
- node.labels.type20 == etcd01
replicas: 1

command:
  - /usr/local/bin/etcd
  - -name
  - etcd01
  - --data-dir
  - /etcd_data
  - -advertise-client-urls
  - http://etcd01:2379,http://etcd01:4001,http://127.0.0.1:2379
  - -listen-client-urls
  - http://0.0.0.0:2379,http://0.0.0.0:4001
  - -initial-advertise-peer-urls
  - http://etcd01:2380
  - -listen-peer-urls
  - http://0.0.0.0:2380
  - -initial-cluster
  - etcd01=http://etcd01:2380,etcd02=http://etcd02:2380,etcd03=http://etcd03:2380

etcd02:
image: quay.io/coreos/etcd
ports:
- 2379
- 4001
- 2380
volumes:
- etcd02:/etcd_data
networks:
- dbs1
deploy:
placement:
constraints:
- node.labels.type20 == etcd02
replicas: 1
command:
- /usr/local/bin/etcd
- -name
- etcd02
- --data-dir
- /etcd_data
- -advertise-client-urls
- http://etcd02:2379,http://etcd02:4001,http://127.0.0.1:2379
- -listen-client-urls
- http://0.0.0.0:2379,http://0.0.0.0:4001
- -initial-advertise-peer-urls
- http://etcd02:2380
- -listen-peer-urls
- http://0.0.0.0:2380
- -initial-cluster
- etcd01=http://etcd01:2380,etcd02=http://etcd02:2380,etcd03=http://etcd03:2380
etcd03:
image: quay.io/coreos/etcd
ports:
- 2379
- 4001
- 2380
volumes:
- etcd03:/etcd_data
networks:
- dbs1
deploy:
placement:
constraints:
- node.labels.type20 == etcd03
replicas: 1

command:
  - /usr/local/bin/etcd
  - -name
  - etcd03
  - --data-dir
  - /etcd_data
  - -advertise-client-urls
  - http://etcd03:2379,http://etcd03:4001,http://127.0.0.1:2379
  - -listen-client-urls
  - http://0.0.0.0:2379,http://0.0.0.0:4001
  - -initial-advertise-peer-urls
  - http://etcd03:2380
  - -listen-peer-urls
  - http://0.0.0.0:2380
  - -initial-cluster
  - etcd01=http://etcd01:2380,etcd02=http://etcd02:2380,etcd03=http://etcd03:2380

volumes:
etcd01:
etcd02:
etcd03:

networks:
dbs1:
external: true

Start with the provided etcd Compose configuration and the Docker Swarm overlay network, focusing on peer traffic to port 2380 between nodes in different subnets. Reproduce the timeout and compare it with the stated telnet and nc results; done should mean identifying a confirmed networking cause and documenting a reproducible resolution.