This LP doesn't seem to be a valid bug, based on the feedback provided
in the associated code review:
https://review.opendev.org/c/openstack/neutron/+/899374. Let's continue
the conversation in Gerrit and we can reclassify this LP based on that
conversation
** Changed in: neutron
Status: In Progress => Invalid
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https://bugs.launchpad.net/bugs/2040242
Title:
[ipam] Why prevent first ip < (subnet.first + 1) if version of subnet
is ipv6
Status in neutron:
Invalid
Bug description:
As we know, we can use ipv6 address end with '0' like 2001::.
But when we allocate ipv6 pool use neutron, we could find the error like
follows:
neutron net-create net-v6
neutron subnet-create --ip-version 6 --allocation-pool
start=2001::,end=2001::2 net-v6 2001::/64
The allocation pool 2001::-2001::2 spans beyond the subnet cidr 2001::/64.
Neutron server returns request_ids:
['req-9a6569ed-52d7-4c3f-ad7e-8986a041a347']
We found that the error info from the func
'validate_allocation_pools':
else: # IPv6 case
subnet_first_ip = netaddr.IPAddress(subnet.first + 1)
subnet_last_ip = netaddr.IPAddress(subnet.last)
LOG.debug("Performing IP validity checks on allocation pools")
ip_sets = []
for ip_pool in ip_pools:
start_ip = netaddr.IPAddress(ip_pool.first, ip_pool.version)
end_ip = netaddr.IPAddress(ip_pool.last, ip_pool.version)
if (start_ip.version != subnet.version or
end_ip.version != subnet.version):
LOG.info("Specified IP addresses do not match "
"the subnet IP version")
raise exc.InvalidAllocationPool(pool=ip_pool)
if start_ip < subnet_first_ip or end_ip > subnet_last_ip:
LOG.info("Found pool larger than subnet "
"CIDR:%(start)s - %(end)s",
{'start': start_ip, 'end': end_ip})
raise exc.OutOfBoundsAllocationPool(
pool=ip_pool,
subnet_cidr=subnet_cidr)
Why neutron ipam force first ip of one pool >= (subnet.first + 1) if
version of subnet is ipv6 ?
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