Cisco MDS 9000 Series Troubleshooting Guide

CHAPTER
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5-1
Cisco MDS 9000 Family Troubleshooting Guide
OL-5183-02, Cisco MDS SAN-OS Release 1.3
5
Troubleshooting IP Storage Issues
This chapter describes IP storage troubleshooting procedures and includes the following sections:
• Overview, page 5-1
• Troubleshooting IP Connections, page 5-2
• Troubleshooting FCIP Connections, page 5-5
• Troubleshooting iSCSI Issues, page 5-31
• Fine Tuning/Troubleshooting IPS iSCSI TCP Performance, page 5-44
Overview
Using open-standard, IP-based technology, the Cisco MDS 9000 Family IP storage module enables you
to extend the reach of Fibre Channel SANs. The switch can connect separated SAN islands together via
IP networks using FCIP, and allow IP hosts to access FC storage using the iSCSI protocol.
The IP Storage (IPS) services module allows you to use FCIP and iSCSI features. It supports the full
range of features available on other switching modules, including VSANs, security, and traffic
management. The IPS module can be used in any Cisco MDS 9000 Family switch and has eight Gigabit
Ethernet ports. Each port can run the FCIP and iSCSI protocols simultaneously.
FCIP transports Fibre Channel frames transparently over an IP network between two Cisco MDS 9000
Family switches or other FCIP standards-compliant devices (see Figure 5-1). Using the iSCSI protocol,
the IPS module provides IP hosts access to Fibre Channel storage devices. IP host-initiated iSCSI
commands are encapsulated in IP, and sent to an MDS 9000 IPS port. There, the commands are routed
from the IP network into a Fibre Channel network, and forwarded to the intended target.
Figure 5-1 Connecting MDS 9000 Family Switches Over IP
FC
FC
HBA
MDS1MDS1 MDS2
IP
Network
FC1/1FC1/14
GE 2/8
10.10.10.2/24
GE 2/8
10.10.11.2/24
FCIP Tunnel
(VE Virtual E-Port)
Fcip profile 28
IP adress 10.10.10.2
Interface fcip 28
use-profile 28
peer-info ipaddr 10.10.11.2
Fcip profile 28
IP adress 10.10.11.2
Interface fcip 28
use-profile 28
peer-info ipaddr 10.10.10.2
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Cisco MDS 9000 Series Specifications

General

Category	Switch
Operating System	Cisco NX-OS
Ports	Varies by model
Protocols	Fibre Channel (FC), Fibre Channel over IP (FCIP), iSCSI
Redundancy	Redundant supervisors, power supplies, and fans
Management	Cisco Data Center Network Manager (DCNM), CLI, SNMP
Virtualization Support	VSANs (Virtual SANs)
Security Features	Fibre Channel Security Protocol (FC-SP)
Hot Swappable Components	power supplies, fans
Power Supply Options	AC and DC options available