<div dir="ltr"><span id="docs-internal-guid-be63c6ad-a154-749d-c092-39571c10a8af"><p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">Hi!</span></p>
<br><p dir="ltr" style="line-height:1.5;margin-top:0pt;margin-bottom:14pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">I feel I need a piece of advice regarding this bug [1].</span></p>
<p dir="ltr" style="line-height:1.5;margin-top:0pt;margin-bottom:14pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">The gist of the problem is that although there is an option network_device_mtu that can be specified in neutron.conf VMs are not getting that mtu on their interfaces. MTU can be specified by the dhcp agent by adding the option to dnsmasq_config_file like it’s done here [2]. So one of the solutions might be to check whether the network_device_mtu is specified during spawning of Dnsmasq process and if it is add an option to Dnsmasq options file.</span></p>
<p dir="ltr" style="line-height:1.5;margin-top:0pt;margin-bottom:14pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">But I am not sure whether this is something worth being fixed and if the above-described option is the right way to fix the bug.</span></p>
<p dir="ltr" style="line-height:1.5;margin-top:0pt;margin-bottom:14pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">By the way, as I found out, MTU cannot currently be set for instances that are running cirros, because cirros does not handle dhcp options like it’s said in the following bug. [3]</span></p>
<p dir="ltr" style="line-height:1.5;margin-top:0pt;margin-bottom:14pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">Regards, Elena Ezhova</span></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">[1] </span><a href="https://bugs.launchpad.net/neutron/+bug/1348788" style="text-decoration:none"><span style="font-size:15px;font-family:Arial;text-decoration:underline;vertical-align:baseline;white-space:pre-wrap;background-color:transparent">https://bugs.launchpad.net/neutron/+bug/1348788</span></a></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">[2] </span><a href="https://ask.openstack.org/en/question/12499/forcing-mtu-to-1400-via-etcneutrondnsmasq-neutronconf-per-daniels/" style="text-decoration:none"><span style="font-size:15px;font-family:Arial;text-decoration:underline;vertical-align:baseline;white-space:pre-wrap;background-color:transparent">https://ask.openstack.org/en/question/12499/forcing-mtu-to-1400-via-etcneutrondnsmasq-neutronconf-per-daniels/</span></a></p>
<p dir="ltr" style="line-height:1.15;margin-top:0pt;margin-bottom:0pt"><span style="font-size:15px;font-family:Arial;color:rgb(0,0,0);vertical-align:baseline;white-space:pre-wrap;background-color:transparent">[3] </span><span style="text-decoration:underline;font-size:15px;font-family:Arial;vertical-align:baseline;white-space:pre-wrap;background-color:transparent"><a href="https://bugs.launchpad.net/cirros/+bug/1301958" style="text-decoration:none">https://bugs.launchpad.net/cirros/+bug/1301958</a></span></p>
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