Cisco Nexus 7000 Design Manual page 49

NetApp Storage Controllers
NetApp Clustered Data ONTAP allows one or more storage HA pairs that are interconnected to be
managed as a single system or pool of storage resources.
the clustered Data ONTAP environment used during validation. The physical cluster consists of two
NetApp storage controllers (nodes) configured in an HA pair and two cluster interconnect switches;
disks and shelves are not shown in this example. The fundamental connections or network types defined
for a clustered Data ONTAP solution include:
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The maximum number of nodes for a single cluster serving SAN data is six.
Note
As illustrated, the storage controllers use multiple constructs to abstract the physical resources. These
elements include:
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HA interconnect—A dedicated interconnect between two nodes permitting the formation of HA
pairs. These are also known as storage failover pairs.
Cluster interconnect—A dedicated high-speed, low-latency, private network used for
communication between nodes.
Management network—A network used for administration of the nodes, cluster, and virtual storage
servers (Vservers).
Data network—A network used by clients to access data.
Ports—A physical port such as e0a or e1a or a logical port such as a virtual LAN (VLAN) or an
interface group (ifgrp).
Ifgrps—A collection of physical ports to create one logical port constitutes an interface group.
NetApp's interface group is a link aggregation technology and may be deployed in single
(active/passive), multiple (always "on"), or dynamic (active LACP) mode, but it is recommended to
use only dynamic interface groups to take advantage of LACP-based load distribution and link
failure detection.
LIF—A logical interface that is associated to a physical port, interface group, or VLAN interface.
More than one LIF may be associated to a physical port at the same time. There are three types of
LIFs:
NFS LIF
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iSCSI LIF
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FC LIF
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LIFs are logical network entities that have the same characteristics as physical network devices but
are not tied to physical objects. LIFs used for Ethernet traffic are assigned specific Ethernet-based
details such as IP addresses and iSCSI qualified names and then are associated with a specific
physical port capable of supporting Ethernet. LIFs used for FC-based traffic are assigned specific
FC-based details such as worldwide port names (WWPNs) and then are associated with a specific
physical port capable of supporting FC or FCoE. NAS LIFs can be non disruptively migrated to any
other physical network port throughout the entire cluster at any time, either manually or
automatically (by using policies), whereas SAN LIFs rely on MPIO and ALUA to notify clients of
any change in the network topology.
Vserver—A Vserver is a secure virtual storage server that contains data volumes and one or more
LIFs, through which it serves data to the clients. A Vserver securely isolates the shared virtualized
data storage and network and appears as a single dedicated server to its clients. Each Vserver has a
separate administrator authentication domain and can be managed independently by a Vserver
administrator.
Figure 22 details the logical configuration of
VMware vSphere 5.1 on FlexPod with Nexus 7000 Using FCoE
FlexPod Implementation and Design
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