IP Services Overview
The Cisco MDS 9000 NX-OS software provides features such as FCIP, SAN Extension Tuner, iSCSI, IP storage, IPv4, and IPv6 in a single platform. These IP services simplify SAN provisioning by automatically distributing configuration information to all the switches in a storage network. The Virtual Routing Redundancy Protocol (VRRP) increases the IP network availability for iSCSI and FCIP connections by allowing failover of connections from one port to another. The increased IP network availability facilitates the failover of an iSCSI volume from one IP services port to any other IP services port, either locally or on another Cisco MDS 9000 switch.
This chapter includes the following sections:
FCIP (Fibre Channel over IP Protocol) transparently connects a remote Fibre Channel storage area network (SAN island) by transporting Fibre Channel data from a local SAN to a remote SAN using IP networks. IP network availability for the FCIP connections can be increased by using features such as Virtual Routing Redundancy Protocol (VRRP) and quality of service (QoS). FCIP can be optimized for wire performance through enhancements that address out-of-order delivery issues, support jumbo frames, provide traffic shaping, and perform TCP optimization.
For more information on configuring FCIP, see Chapter2, “Configuring FCIP”
SAN Extension Tuner
The SAN Extension Tuner (SET) feature helps you optimize FCIP performance by generating Small Computer System Interface (SCSI) I/O commands and directing the traffic to a specific virtual target. SET reports the I/Os per second and I/O latency results, which helps you to determine the number of concurrent I/Os needed to maximize the FCIP throughput.
For information on configuring the SAN Extension Tuner, see Chapter3, “Configuring the SAN Extension Tuner”
The iSCSI feature allows an IP host to access Fibre Channel storage. This feature enables routing iSCSI requests and responses between iSCSI hosts in an IP network and Fibre Channel storage devices in the Fibre Channel SAN. The Fibre Channel Storage devices are accessible from any Fibre Channel interface of the Cisco MDS 9000 Family switch.
For information on configuring iSCSI, see Chapter4, “Configuring iSCSI”
The IP Services Modules allow you to extend storage networks using the Ethernet infrastructure. The Cisco MDS 9000 Family switches route IP traffic between Ethernet and Fibre Channel interfaces. The IP static routing feature is used to route the traffic between VSANs.This chapter also describes the procedure to configure IP Route using Fabric Manager And Device Manager. From NX-OS release 4.2(1) and later, CPP interfaces are also available for selection while creating a new IP route.
For information on configuring IP services, see Chapter5, “Configuring IP Services”
The IP Storage (IPS) Service module allows you to use the open-standard FCIP protocol to enable interconnection of SAN islands over extended distances. The IPS module and the MSM-18/4 module allow you to use FCIP and iSCSI features. Both modules integrate seamlessly into the Cisco MDS 9000 Family, and support the full range of features that are available on other switching modules, including VSANs, security, and traffic management.
For information on configuring IP Storage, see Chapter6, “Configuring IP Storage”
IPv4 and IPv6
The Cisco MDS 9000 NX-OS software supports the IP version 4 (IPv4) and version 6 (IPv6) protocols on Gigabit Ethernet interfaces. The architecture of IPv6 has been designed to allow existing IPv4 users to transition easily to IPv6, while providing services such as end-to-end security, quality of service (QoS), and globally unique addresses. The dual stack approach for IPv4 and IPv6 allows Cisco MDS 9000 Family switches to connect to older IP networks, transitional networks of both versions, and IPv6 data networks.
For more information on configuring IPv4 for Gigabit Ethernet interfaces, see Chapter7, “Configuring IPv4 for Gigabit Ethernet Interfaces”
For more information on configuring IPv6 for Gigabit Ethernet interfaces, see Chapter8, “Configuring IPv6 for Gigabit Ethernet Interfaces”