Subnets
A subnet is a logical subdivision of a network. It is defined by the first IP address in the network and a netmask that specifies
a contiguous range of IP addresses within that network. A subnet can be assigned to one or more network interfaces.
The maximum Transmission Unit (MTU) can be set for a subnet so that it uses either a standard, jumbo, or custom frame size.
If you choose to use a custom frame size, you must specify the size in bytes.
Specifying a VLAN ID on a subnet allows more than one subnet to be assigned to an interface using IEEE 802.1Q tagged
frames. Subnets without a VLAN ID can only have untagged assignments. Switch port configurations must match the VLAN
IDs configured on the subnets for tagged assignments. For more information, refer to the procedure to Configure VLAN
Tagging in the GUI Administration Guide or CLI Administration Guide.
Subnet Traffic Types
Traffic types are used to segregate network traffic into different subnets. A subnet can carry one of the following traffic types.
Table 2: Traffic Types
Description
Traffic Type
The subnet carries only management traffic.
Management
(Mgmt only)
The subnet carries only data traffic.
Data (Data only)
The subnet carries both management and data traffic.
Management and
Data (Mgmt + Da-
ta)
Subnet Traffic Assignments
Traffic assignments determine what type of iSCSI traffic a data subnet carries. You can assign a data subnet on an iSCSI array
to carry one of the following kinds of traffic.
Note: Traffic assignments are not required for Fibre Channel arrays.
Table 3: Traffic Assignments
Description
Traffic Assignment
The subnet carries both iSCSI data traffic and intra-group communication (traffic between arrays
in a group).
iSCSI + Group
The subnet carries only iSCSI data traffic.
iSCSI only
The subnet carries intra-group communication traffic.
Group only
IP Address Zones in Subnets
An IP address zone is a group of host IP addresses and array data IP addresses in a subnet. When using two switches for iSCSI
traffic, hosts can achieve better performance by establishing iSCSI connections with data IP addresses inside the same zone,
as opposed to establishing iSCSI connections with data IP addresses in a different zone.
Note: IP address zones are not required for Fibre Channel arrays.
The IP addresses within a subnet can be divided into IP address zone types.
Install the HPE Storage Array 15
