Can't update network in Openstack Horizon dashboard

[Gleb Zimin]

Using Openstack dashboard Horizon you can't enable shared or external flag on existing network.
Later i found in Neutron logs error like this.

ERROR neutron_plugin_contrail.plugins.opencontrail.contrail_plugin_base [req-822c044e-f2d4-4624-99c8-20ca5278056d 940328fa9e9b4365ac0cf0441af31144 ff7b510b7df7427198b5326e1d23ed3c - - -] BadRequest{u'msg': u'Inconsistent is_shared (True a) and global_access (0)', u'exception': u'BadRequest'}network

So, here we understand that shared flag related to opencontrail global_access network parameter, but in openstack dashboard we can't change global_access. And we have the same situation for external_network parameter. If i want to make my private network to be external i catch the same error.

For external_network parameter i found related patch - https://review.opencontrail.org/#/c/34408/
But i don't think that this is right logic.

So, if we want to make network accessible outside of the project we need to enable shared flag. And if our network has external_network flag enabled it doesn't mean that this network should be accessible outside of project. If i am wrong, please correct me.

Enviroment: Openstack Ocata version, Opencontrail 4.0

UPD:
I used another enviroment with openstack + ovs as an example and it's true that external network should be readable and refer-able from outside, but the bug with shared flag is still relevant.