yahoo-eng-team team mailing list archive

[Kevin Benton <1465513@xxxxxxxxxxxxxxxxxx>]

This is intentional. The gateway_ip is what is given via DHCP regardless
of router port IP addresses. If you want the clients to get a different
address, you have to update the gateway_ip property of the subnet.

This is done because there could be multiple or no routers attached to a
single network (e.g. routing done via a service VM).

** Changed in: neutron
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1465513

Title:
  VM get incorrect default gateway when attached port DG manually to
  router

Status in OpenStack Neutron (virtual network service):
  Invalid

Bug description:
  When I create neutron port and attach it to router as "default
  gateway"  and  launch  VM I can see that VM get ip address of default
  gateway that not match to ip address of neutron router port. It  get
  the ip gateway  from subnet configuration which is  x.y.z.1

  Version: OSP 7 on rhel 7.1
  # rpm -qa |grep dnsmasq
  dnsmasq-utils-2.67-1.fc20.x86_64
  dnsmasq-2.67-1.fc20.x86_64
  [root@puma15 ~(keystone_admin)]# rpm -qa |grep neutron
  python-neutron-2015.1.0-1.el7ost.noarch
  openstack-neutron-fwaas-2015.1.0-3.el7ost.noarch
  openstack-neutron-2015.1.0-1.el7ost.noarch
  python-neutron-lbaas-2015.1.0-3.el7ost.noarch
  python-neutronclient-2.4.0-1.el7ost.noarch
  openstack-neutron-lbaas-2015.1.0-3.el7ost.noarch
  openstack-neutron-openvswitch-2015.1.0-1.el7ost.noarch
  python-neutron-fwaas-2015.1.0-3.el7ost.noarch
  openstack-neutron-common-2015.1.0-1.el7ost.noarch

  step to reproduce : 
  1. Create a neutron tenant network. 
  2. Create an IPv4 subnet for the network (say 192.168.1.0/24 with  gateway_ip as 192.168.1.1) 
  3. Create a neutron router (say router1). 
  4. Create a port on the tenant network (without specifying any  fixed_ip). The port would be allocated a free IP from the allocation  pool (i.e., say 192.168.1.3). 
  5. Now attach this port to the neutron router (i.e., neutron  router-interface-add <router1-id> <port-id>) 
  6. Spawn some VMs with the above network. 
  Observations: 
  VMs would acquire IP address (something like 192.168.1.4) with a default  gateway as 192.168.1.1 and not the ip 192.168.1.3 (i.e., ip of the port  which is attached to the neutron router)

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