Lab Setup; Configuration From The Bottom Mds - Cisco MDS 9000 Series Troubleshooting Manual

Chapter 5 Troubleshooting IP Storage Issues
S e n d c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .
Figure 5-14 IPS Window Scaling
Windows 2000/SP3
Cisco iSCSI - 3.1.1
NIC Alacritech TOE

Lab Setup

This is the lab setup that was used in collecting the performance-related information.
The server was an IBM PentiumIII Server: Dual CPU @ 1.13 Ghz
The
The IBM ESS Shark had a hardcoded B2B value of 64 (not configurable).
The
The
below for full WWPN:
C4 C4 C4 C4
C8 C8 C8 C8

Configuration from the Bottom MDS

The following example is the configuration for the 9216 switch shown in
iscsi initiator name iqn.1987-05.com.cisco:02.75af2f95624c.shark-nas
pWWN 20:05:00:0c:30:6c:24:42
vsan 777
vsan 778
iscsi virtual-target name shark_nas
pWWN 50:05:07:63:00:c8:94:4c fc-lun 0000 iscsi-lun 0000 secondary-pwwn
50:05:07:63:00:c4:94:4c
pWWN 50:05:07:63:00:c8:94:4c fc-lun 0001 iscsi-lun 0001 secondary-pwwn
50:05:07:63:00:c4:94:4c
initiator iqn.1987-05.com.cisco:02.75af2f95624c.shark-nas permit
interface GigabitEthernet2/1
ip address 10.48.69.251 255.255.255.192
iscsi authentication none
OL-5183-02, Cisco MDS SAN-OS Release 1.3
Shark-nas
10.48.69.233
FC
HBA
Driver 5.50
tcp window-size tcp window-size tcp window-size tcp window-size
at both ends was set to 1MB (1024K).
fcrxbbcredit fcrxbbcredit
fcrxbbcredit fcrxbbcredit
on the corresponding switch port (fc1/3) was set to the same value.
C4 and C8 represented the corresponding port WWPNs for the IBM Shark storage subsytem. See
50:05:07:63:00:c4:94:4c
50:05:07:63:00:c8:94:4c
Fine Tuning/Troubleshooting IPS iSCSI TCP Performance
MDS 9216_Top
1.1(0.133c)
2/1
Catalyst 6000
10.48.69.250
iSCSI/TCP
2/1
MDS 9216_Bottom
1.1(0.133c)
(in VSAN 778)
(in VSAN 777)
Cisco MDS 9000 Family Troubleshooting Guide
FC 1/3
C4
FC
E-ISL
ESS 2105/F20
FCP
C8
FC 1/3
Figure 5-14.
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