Subnet {{ subnet.subnet }} in

Multiple DHCP servers can share a subnet when they run in High Availability mode or when they are connected to a shared lease database. In this case, the servers typically have the same subnet configuration (i.e., the same pools, DHCP options, and other DHCP-specific parameters). However, there are valid cases when the subnet configurations differ on individual servers. For example, interfaces used for subnet selection may have a different names. The servers may use distinct pools within the subnet for the address assignment. The subnet configurations may even use different subnet identifiers for the same subnet.

The Configured Subnet ID column below lists the subnet identifiers used to identify the subnet on the different servers.

If the configured pools differ on the servers, they are displayed individually for each server. Otherwise, they are combined in a single box.

Finally, each server maintains its own lease utilization statistics. The first pie charts show the total address and/or prefix utilizations. The remaining pie charts show the utilizations reported by the individual servers. The individual statistics are not displayed if there is only one server serving leases in this subnet.

The detailed address utilization statistics use the following naming conventions:

- total - the number of addresses in a subnet.
- assigned - the number of allocated leases including declined leases.
- used - the number of allocated leases excluding declined leases.
- declined - the number of declined leases.
- uncertain - optional statistics only presented when the number of declined leases is greater than assigned (see below).

There are rare cases when a Kea server can return inconsistent statistics, with the number of declined leases greater than assigned leases. It may happen when some of the DHCP clients decline already released or expired leases. These leases are not counted as assigned, but the declined statistics is affected. Stork deals with such cases by introducing the uncertain leases count. It holds an estimated number of leases for which it is unclear whether they are allocated, declined or free. This statistic is only computed and presented when the number of declined leases is greater than assigned.

The DHCP parameters can be specified at different configuration levels and the subnet configuration can inherit them from the global and/or shared network level. The list below contains all parameters configured for all servers sharing the subnet, and at all configuration levels. An effective value is displayed next to a parameter name. You can expand a parameter by clicking the button to the left of the parameter name to view the values specified at the different levels for each server. The subnet-level value takes precedence over the shared network-level and the global values.

Server Configured subnet ID
{{ l.id }}
Pools / {{ localSubnet.appName }} All Servers
No pools configured.
DHCP Options / {{ localSubnet.appName }} All Servers