Cisco MDS 9000 Series

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5-46
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)
--- ----------- ------ --------------------------------------------------