Dell CLARiiON AX4 CX-Series iSCSI Storage Systems Troubleshooting Guide
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- Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 1
and/or authorized service providers who are troubleshooting network problems with EMC® CLARiiON® CX-Series iSCSI storage systems. This guide assumes that the storage Rules 2 ◆ Basic iSCSI Connectivity 10 ◆ Troubleshooting iSCSI Problems 13 ◆ Event Log Messages 21 ◆ Customer Support 23 1 - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 2
transparent to the storage system and are supported as long as the network quality CLARiiON® Fibre Channel storage system and an iSCSI storage system. ◆ Servers with HBAs and servers with NICs can connect to the same storage system. 2 CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 3
EMC does not support 10/100 NIC service will not use iSNS, you must configure target storage-system addresses manually on the server initiators. ◆ You must configure server names and passwords manually on the iSCSI storage system. CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 4
between the server and the storage system, support the management ports on the same subnet as the data ports (see the first bullet under Switches, Routers, Network Interface Cards (NICs), and Host Bus Adapters (HBAs) on page 2). 4 CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 5
connect to the same storage system or different storage systems. ◆ You can connect servers with HBAs and servers with NICs to the same storage system. CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide 5 - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 6
bullet under Environments and Configurations on page 3). ◆ You cannot mix NICs and HBAs in a single server to connect to the same or different storage system. 6 CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 7
), and Host Bus Adapters (HBAs) on page 2). ◆ You cannot mix NICs and HBAs in a single server to connect to the same or different storage systems. CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide 7 - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 8
traffic. ◆ The default configuration of the Microsoft iSCSI Software Initiator is adequate for this type of configuration because by default each resides on a unique subnet. 8 CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 9
CX-Series iSCSI storage system 2 are using direct connections and subnet connections. ◆ CX-Series iSCSI storage system 3 has connections from each SP to each subnet. CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide 9 - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 10
through the network, it could potentially point out which part of the network is having problems. The ping and traceroute tools are available in both Navisphere Manager and Navisphere CLI. use the operating system ping tool. 10 CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 11
Example of ping on the Storage System Basic iSCSI Connectivity CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide 11 - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 12
Basic iSCSI Connectivity Example of traceroute on the Storage System Note The #1 entry should be the gateway defined in the iSCSI port configuration. 12 CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 13
(page 14) ◆ iSNS troubleshooting (page 15) ◆ iSCSI network troubleshooting (page 16) ◆ iSCSI CHAP authentication troubleshooting (page 17) ◆ Miscellaneous iSCSI troubleshooting (page 18) ◆ iSCSI performance troubleshooting (page 19) CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide 13 - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 14
's network or No cabling has a problem. See iSCSI Network Troubleshooting. Yes See Customer Support. No Do any iSCSI event entries Troubleshooting. For all other issues, use the event log as a starting point for debugging. 14 CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 15
server running? Yes Diagnose Can you connectivity No ping the iSNS problems. server? Are the storage-system targets registered on the iSNS server an iSNS Service Started message in the Event Log? No See Customer Support. CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide 15 - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 16
storage system's iSCSI port. Yes Can you ping another IP address on the storage system's iSCSI network? You have a problem with the No storage system's iSCSI network. Yes You have a problem with the storage system's iSCSI port. 16 CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 17
? You have a problem with the CHAP records on the storage system, the initiator has incorrect CHAP information, or either the Yes initiator or storage system does not have CHAP enabled. See the CX-Series iSCSI Security Setup Guide. CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide 17 - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 18
Troubleshooting iSCSI Problems Miscellaneous iSCSI Troubleshooting Your iSCSI server connections are intermittent. Is your iSCSI server initiator stuck in " for entries (could be errors or warnings) from iScsiPrt or MSiSCSI. 18 CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 19
troubleshooting common network problems, more extensive network troubleshooting or assessments are typically offered by EMC or your network vendor for a service for HBAs. The network configurations support 10/100 and 1-gigabit Ethernet CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide 19 - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 20
netstat and traceroute, and then looking for paths and routes that appear problematic. Performance problems can happen when packets are dropped, causing them to be retransmitted. You can where possible, to alleviate the hot spots. 20 CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 21
failures can help you determine where to start troubleshooting a network problem. An example of an iSCSI event in the Troubleshooting on page 14. For all Login Failure events, there is an Info field, which is 0x01200804 in this example. CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 22
Info classes. Use this class information to determine where to start troubleshooting. Event Log Info Class 0x012007XX 0x012008XX 0x012009XX 0x01200AXX Description iSCSI Failures (does not include reverse authentication failures) 22 CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 23
Customer Support Customer Support This section reviews the EMC process for detecting and resolving software problems, and provides essential questions that you should answer before contacting the EMC Customer Support Center. CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide 23 - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 24
4SVC Worldwide: (508) 497-7901 Confirm that the Problem is Software Related Call will be Directed to an EMC Software Support Engineer Problem is Tracked and Managed to Resolution Figure 1 Problem Detection and Resolution Process 24 CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 25
(if one has been assigned to you): ❑ Your company name ❑ Your name ❑ Your phone number ❑ For an existing problem, the problem tracking system ID, if one was previously assigned to the problem by a support representative CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide 25 - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 26
software worked properly and the problem began ❑ Exact sequence of events that led to the system error ❑ Message numbers and complete text of any messages that the system produced ❑ Log file dated near the time the error occurred 26 CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 27
mail to the following address: EMC Customer Support Center 171 South Street Hopkinton, MA 01748-9103 If the problem was assigned a number or a specific support representative, please include that information in the address as well. CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide 27 - Dell CLARiiON AX4 | CX-Series iSCSI Storage Systems Troubleshooting Guide - Page 28
Customer Support Copyright © 2005 EMC Corporation. All Rights Reserved. EMC believes the information in this publication is of EMC Corporation. All other trademarks mentioned herein are the property of their respective owners. 28 CLARiiON CX-Series iSCSI Storage Systems Troubleshooting Guide
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1
This guide contains information on how to troubleshoot the iSCSI
interface that connects an iSCSI storage system to a server. It is intended
for network administrators and/or authorized service providers who
are troubleshooting network problems with EMC® CLARiiON®
CX-Series iSCSI storage systems. This guide assumes that the storage
system is configured properly, that is, RAID Groups and LUNs are
bound correctly, and the correct Storage Group is available to the server.
Topics include
◆
iSCSI Configuration Rules
...................................................................
2
◆
Basic iSCSI Connectivity
....................................................................
10
◆
Troubleshooting iSCSI Problems
.......................................................
13
◆
Event Log Messages
............................................................................
21
◆
Customer Support
...............................................................................
23
CLARiiON
CX-Series iSCSI Storage Systems
Troubleshooting Guide
P/N 300-002-262
REV A02
April 2, 2005