[Openstack] Urgent! MTU size issue

Satish Patel satish.txt at gmail.com
Wed Nov 9 20:56:46 UTC 2016

If i enable Jumbo frames on openstack in that case do i need to change
or enable anything on my external/physical network infrastructure?

On Wed, Nov 9, 2016 at 3:13 PM, Mohammed Naser <mnaser at vexxhost.com> wrote:
> Are you using any tunnelling or are you directly attaching to your physical network?
> If you're using tunnelling, I would recommend running jumbo frames on your compute and network nodes so they can transport packets with size of 1500. There is plenty of docs about this online that you can check.
> Sent from my iPhone
>> On Nov 9, 2016, at 11:06 AM, Satish Patel <satish.txt at gmail.com> 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?
>> _______________________________________________
>> Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
>> Post to     : openstack at lists.openstack.org
>> Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack

More information about the Openstack mailing list