# Docker swarm cluster network issue

**URL:** <https://forums.rockylinux.org/t/docker-swarm-cluster-network-issue/5335>\
**Category:** Infrastructure\
**Created:** [February 10, 2022, 6:24am UTC](https://forums.rockylinux.org/t/docker-swarm-cluster-network-issue/5335 "2022-02-10T06:24:19Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![akhiljohn](https://avatars.discourse-cdn.com/v4/letter/a/a5b964/32.png) [@akhiljohn](https://forums.rockylinux.org/u/akhiljohn)\
**Post date:** [February 10, 2022, 6:24am UTC](https://forums.rockylinux.org/t/docker-swarm-cluster-network-issue/5335/1 "2022-02-10T06:24:19Z")

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I have created docker swarm cluster with  
manager (RockyLinux 8.5 and docker 20.10.12)  
worker-1 (RockyLinux 8.5 and docker 20.10.12)  
worker-2 (RockyLinux 8.5 and docker 20.10.12)

disabled selinux and configured firewalld with all required ports and services in all nodes

I have created overlay network proxy-backend deployed a stack web with two services through proxy-backend network.  
web\_nginx running on worker1  
web\_mysql running on worker2

The issue is I’m unable to connect from web\_nginx to web\_mysql  
telnet web\_mysql 3306

But it’s working when deploying both service in same node like  
web\_nginx running on worker1  
web\_mysql running on worker1

Unable to connect services running on different nodes with same network.

I have configured same infrastructure on CentOS 7 and it working as expected.

We didn’t get any clue where it blocks in RockLinux.  
Can any one help on this?

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**Author:** ![akhiljohn](https://avatars.discourse-cdn.com/v4/letter/a/a5b964/32.png) [@akhiljohn](https://forums.rockylinux.org/u/akhiljohn)\
**Post date:** [February 10, 2022, 12:19pm UTC](https://forums.rockylinux.org/t/docker-swarm-cluster-network-issue/5335/2 "2022-02-10T12:19:53Z")

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disabling tx-checksum-ip-generic will fix this issue.  
ethtool -K ens192 tx-checksum-ip-generic off

But any option to work this without disable tx-checksum-ip-generic?

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**Author:** ![brian](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.rockylinux.org/brian/32/5777_2.png) [@brian](https://forums.rockylinux.org/u/brian)\
**Post date:** [August 25, 2023, 3:55am UTC](https://forums.rockylinux.org/t/docker-swarm-cluster-network-issue/5335/3 "2023-08-25T03:55:33Z")

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