2016-04-18 15:58 GMT+09:00 Ihar Hrachyshka <ihrachys at redhat.com>: > Sławek Kapłoński <slawek at kaplonski.pl> wrote: > >> Hello, >> >> What MTU have You got configured on VMs? I had issue with performance on >> vxlan network with standard MTU (1500) but when I configured Jumbo >> frames on vms and on hosts then it was much better. > > > Right. Note that custom MTU works out of the box only starting from Mitaka. > You can find details on how to configure Neutron for Jumbo frames in the > official docs: > > http://docs.openstack.org/mitaka/networking-guide/adv-config-mtu.html If you want to advertise MTU using DHCP in releases before Mitaka, you can prepare your custom dnsmasq config file like below and set it to dhcp-agent dnsmasq_config_file config option. You also need to set network_device_mtu config parameters appropriately. sample dnsmasq config file: -- dhcp-option-force=26,8950 -- dhcp option 26 specifies MTU. Akihiro > > > Ihar > __________________________________________________________________________ > OpenStack Development Mailing List (not for usage questions) > Unsubscribe: OpenStack-dev-request at lists.openstack.org?subject:unsubscribe > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev >