Cisco MDS 9000 Series Troubleshooting Guide

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Cisco MDS 9000 Family Troubleshooting Guide
OL-5183-02, Cisco MDS SAN-OS Release 1.3
Chapter 5 Troubleshooting IP Storage Issues
Troubleshooting iSCSI Issues
Virtual Target Access Control
When creating a virtual target, double check the following:
• Did you specify the correct port world-wide name?
• If you are creating a virtual target from a subset of LUN(s) of a physical device, did you specify the
correct fibre-channel (physical) LUN(s) and iSCSI (virtual) LUN(s)?
• If using an access list to control access to the virtual target, did you specify the correct initiator(s)?
If you are not using an access list to restrict access, did you specify all-initiator-permit
to insure all initiators have access?
• If restricting access to a particular interface(s), did you specify the correct gigabit Ethernet
interface(s)?
Useful show Commands for Debugging Static iSCSI Configuration
The output from the following commands reflects correctly established iSCSI sessions. Execute the
same commands on your switch and compare with the output below to help identify possible issues:
show iscsi session detail
show iscsi stats
show iscsi stats detail
show fcns data vsan 5
show flogi data vsan 5
show iscsi remote-node iscsi-session-detail tcp-parameters
show iscsi session detail
switch# show iscsi session detail
Initiator iqn.1987-05.com.cisco.02.8cb3c18879bf356ce18e09679103235f.my-kayak (MY-KAYAK)
Session #1 (index 84)
Target iqn.com.domainname.IPS-TEST.02-08.gw.2200002037c52d6d
VSAN 5, ISID 00023d000054, TSID 135, Status active, no reservation
Type Normal, ExpCmdSN 1356, MaxCmdSN 1366, Barrier 0
MaxBurstSize 0, MaxConn 0, DataPDUInOrder No
DataSeqInOrder No, InitialR2T Yes, ImmediateData No
Registered LUN 0, Mapped LUN 0
Stats:
PDU: Command: 13, Response: 13
Bytes: TX: 1344, RX: 0
Number of connection: 1
Connection #1
Local IP address: 0xa011d64, Peer IP address: 0xa011d65
CID 0, State: LOGGED_IN
StatSN 1356, ExpStatSN 0
MaxRecvDSLength 524288, our_MaxRecvDSLength 1392
CSG 3, NSG 3, min_pdu_size 48 (w/ data 48)
AuthMethod none, HeaderDigest None (len 0), DataDigest None (len 0)
Version Min: 0, Max: 0
FC target: Up, Reorder PDU: No, Marker send: No (int 0)
Received MaxRecvDSLen key: Yes
Session #2 (index 85)
Target iqn.com.domainname.IPS-TEST.02-08.gw.2200002037c52e2e
VSAN 5, ISID 00023d000055, TSID 135, Status active, no reservation
Type Normal, ExpCmdSN 1356, MaxCmdSN 1366, Barrier 0

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