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Bug
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Resolution: Done
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Normal
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None
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None
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False
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False
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?
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?
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?
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?
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No
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Moderate
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NFV
Previosly to OSO18, the global_physnet_mtu is set to 9000. Currently, the OSO 18.0 deployment (VA2) doesn't allow to create networks with MTU > 1442:
sh-5.1$ openstack network set --mtu 8942 dpdk-mgmt BadRequestException: 400: Client Error for url: https://neutron-public-openstack.apps.nfv.openstack.lab/v2.0/networks/5b479825-6bee-47d4-83cf-8f712e1bef4a, Invalid input for operation: Requested MTU is too big, maximum is 1442. sh-5.1$ openstack network create --provider-network-type geneve --mtu 8492 dpdk-mgmt2 Error while executing command: BadRequestException: 400, Invalid input for operation: Requested MTU is too big, maximum is 1442.
In a OSP 17 deployment we have this:
(overcloud) [stack@undercloud-0 ~]$ openstack network show dpdk-mgmt -c provider:network_type -c mtu +-----------------------+--------+ | Field | Value | +-----------------------+--------+ | mtu | 8942 | | provider:network_type | geneve | +-----------------------+--------+ [root@compute-0 ~]# grep -Rn global_physnet_mtu /var/lib/config-data/puppet-generated/ |grep -v '#' /var/lib/config-data/puppet-generated/neutron/etc/neutron/neutron.conf:146:global_physnet_mtu=9000 [root@controller-0 ~]# grep -Rn global_physnet_mtu /var/lib/config-data/puppet-generated/ 2>/dev/null |grep -v '#' /var/lib/config-data/puppet-generated/neutron/etc/neutron/neutron.conf:147:global_physnet_mtu=9000 [root@controller-0 ~]# grep -Rn path_mtu /var/lib/config-data/puppet-generated/ 2>/dev/null |grep -v '#' /var/lib/config-data/puppet-generated/neutron/etc/neutron/plugins/ml2/ml2_conf.ini:186:path_mtu=0
