Any commands in openstack to determine Free IPs(for IPV6) in a subnet

asked 2018-10-15 06:59:02 -0500

h4harshith gravatar image


I use the below command, when I want to find out a Free IP in a particular subnet

neutron floatingip-create public
| Field               | Value                                |
| fixed_ip_address    |                                      |
| floating_ip_address |                       |
| floating_network_id | 7a03e6bc-234d-402b-9fb2-0af06c85a8a3 |
| id                  | 9d7e2603482d                         |
| port_id             |                                      |
| router_id           |                                      |
| status              | ACTIVE                               |
| tenant_id           | 9e67d44eab334f07bf82fa1b17d824b6     |

This helps me to find which IP is not in use and could be used

Is there any particular openstack command to check IPV6 addresses which are free in a particular subnet? If no command, any shortcuts to determine IP6 addresses are free? (other than ping6)


edit retag flag offensive close merge delete

2 answers

Sort by » oldest newest most voted

answered 2018-11-27 02:09:00 -0500

h4harshith gravatar image

I found a newer way of determining IPV6 Address. If the neutron ports attached to the networks have DHCPV6 Enabled, We can simply create a new port to the subnet and the network will assign a free IPV6 address using DHCP

edit flag offensive delete link more

answered 2018-10-24 05:49:33 -0500

updated 2018-10-24 05:50:14 -0500

In openstack, [openstack port list --network --fixed-ip subnet= ] command is used to check active ports.

nmap -6 IPv6-Address-Here

nmap -v A -6 2607:f0d0:1002:51::4

N-Map commands can be used to find which IP's are up in a particular subnet, but for large subnet it is difficult.

maybe following link help for you

edit flag offensive delete link more

Get to know Ask OpenStack

Resources for moderators

Question Tools

1 follower


Asked: 2018-10-15 06:59:02 -0500

Seen: 104 times

Last updated: Nov 27 '18