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
Fine Tuning/Troubleshooting IPS iSCSI TCP Performance
no shutdown
vrrp 1
priority 110
address 10.48.69.250
10.48.69.25010.48.69.250
10.48.69.250
(This is the iSCSI target IP address for the Windows iSCSI client.)
no shutdown
interface iscsi2/1
tcp pmtu-enable
tcp window-size 1024
tcp window-size 1024tcp window-size 1024
tcp window-size 1024
(To increase the receive window size of the IPS module (in kilobytes).)
tcp sack-enable
no shutdown
To verify the connectivity between your client and the IPS iSCSI service:
MDS_BOTTOM# show ips stats tcp interface gig 2/1
TCP Statistics for port GigabitEthernet2/1
Connection Stats
0 active openings, 24 accepts
0 failed attempts, 0 reset received, 24 established
Segment stats
7047380 received, 56080130 sent, 0 retransmitted
0 bad segments received, 0 reset sent
TCP Active Connections
Local Address Remote Address State Send-Q Recv-Q
10.48.69.250:3260 10.48.69.233:1026 ESTABLISH 0 0
10.48.69.250:3260 10.48.69.233:1057 ESTABLISH 34560 0
0.0.0.0:3260 0.0.0.0:0 LISTEN 0 0
MDS_BOTTOM# show flogi database vsan 777
---------------------------------------------------------------------------
INTERFACE VSAN FCID PORT NAME NODE NAME
---------------------------------------------------------------------------
fc1/3 777 0x610000 50:05:07:63:00:c8:94:4c 50:05:07:63:00:c0:94:4c
iscsi2/1 777 0x610001 20:05:00:0c:30:6c:24:42 20:00:00:0c:30:57:5e:c2
Total number of flogi = 2.
MDS_BOTTOM# show fcns dabase vsan 777
VSAN 777:
--------------------------------------------------------------------------
FCID TYPE PWWN (VENDOR) FC4-TYPE:FEATURE
--------------------------------------------------------------------------
0x610000 N 50:05:07:63:00:c8:94:4c (IBM) scsi-fcp:target fc..
0x610001 N 20:05:00:0c:30:6c:24:42 scsi-fcp:init isc..w
Total number of entries = 2
MDS_BOTTOM#
MDS_BOTTOM# show module
Mod Ports Module-Type Model Status
--- ----- ------------------------------- ------------------ ------------
1 16 1/2 Gbps FC/Supervisor DS-X9216-K9-SUP active *
2 8 IP Storage Module DS-X9308-SMIP ok
Mod Sw Hw World-Wide-Name(s) (WWN)
--- ----------- ------ --------------------------------------------------

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