[Openstack] Urgent! MTU size issue

Rick Jones rick.jones2 at hpe.com
Wed Nov 9 21:58:07 UTC 2016

On 11/09/2016 08:06 AM, Satish Patel wrote:
> We have 3 node cluster on Mikata openstack and we are using DVR
> network. Recently we build two puppetmaster server on openstack and
> put them behind Lbaasv2 load-balancer to share load but i found my
> none of client able to talk to correctly with puppetmaster server on
> openstack. After lots of research found openstack VM use mtu 1400 and
> my rest of puppet agent server who are not on openstack they used mtu
> 1500.
> as soon as i change puppet agent MTU size to 1400 everything started
> working. But just surprised why openstack use 1400 for VM there must
> be a reason like vxlan or GRE.
> So for experiment i change mtu 1500 on puppetmaster server on
> openstack but it didn't help. How do i fix this issue?

What happens if LBaaS isn't between the client and server?

Does Puppet do anything with UDP or is it all TCP?

rick jones

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