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Code Issues 273 Packages Projects Releases 10 Wiki Activity

Do not allocate subnet router anycast in certain IPv6 prefixes

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This commit is contained in:
Sean M. Collins
2022-04-11 13:56:44 -04:00
parent 517d0158b6
commit b5613a2cc6
2 changed files with 24 additions and 8 deletions
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20
netbox/ipam/models/ip.py
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@@ -507,16 +507,20 @@ class Prefix(GetAvailablePrefixesMixin, NetBoxModel):
child_ranges.add(iprange.range)
available_ips = prefix - child_ips - child_ranges
# IPv6, pool, or IPv4 /31-/32 sets are fully usable
if self.family == 6 or self.is_pool or (self.family == 4 and self.prefix.prefixlen >= 31):
# IPv6 /127's, pool, or IPv4 /31-/32 sets are fully usable
if (self.family == 6 and self.prefix.prefixlen >= 127) or self.is_pool or (self.family == 4 and self.prefix.prefixlen >= 31):
return available_ips
# For "normal" IPv4 prefixes, omit first and last addresses
available_ips -= netaddr.IPSet([
netaddr.IPAddress(self.prefix.first),
netaddr.IPAddress(self.prefix.last),
])
if self.family == 4:
# For "normal" IPv4 prefixes, omit first and last addresses
available_ips -= netaddr.IPSet([
netaddr.IPAddress(self.prefix.first),
netaddr.IPAddress(self.prefix.last),
])
else:
# For IPv6 prefixes, omit the Subnet-Router anycast address
# per RFC 4291
available_ips -= netaddr.IPSet([netaddr.IPAddress(self.prefix.first)])
return available_ips
def get_first_available_ip(self):