Table Of Contents
Configuring SANTap
About SANTap
Enabling SANTap
Displaying SANTap Information
Default Settings
Configuring SANTap
The Storage Services Module (SSM) supports Intelligent Storage Services in Cisco MDS SAN-OS Release 2.1(1a) and later that include SANTap.
This chapter includes the following sections:
•About SANTap
•Enabling SANTap
•Displaying SANTap Information
•Default Settings
About SANTap
The SANTap feature allows third party data storage applications, such as long distance replication and continuous backup, to be integrated into the SAN. The protocol-based interface that is offered by SANTap allows easy and rapid integration of the data storage service application because it delivers a loose coupling between the application and an SSM, thereby reducing the effort needed to integrate applications with the core services being offered by the SSM. See Figure 40-1.
Figure 40-1 Integrating Third-Party Storage Applications in a SAN
SANTap operates in three modes:
•Transparent mode
Transparent mode eliminates the need for any reconfiguration of either the host or target when introducing SANTap based applications. This mode of operation requires that either the host initiator or target be directly connected to an SSM. See Figure 40-2.
Figure 40-2 SANTap Transparent Mode Example
•Proxy mode-1
Proxy mode-1 assigns Cisco-specific WWNs to the virtual initiators (VIs) and digital virtual targets (DVTs). The benefit of this mode is that it eliminates the requirement of transparent mode that a host initiator or a target be connected directly to an SSM. In proxy mode-1, the SSM can be anywhere in the SAN. However, this mode requires reconfiguration of legacy applications. See Figure 40-3.
Figure 40-3 SANTap Proxy Mode-1 Example
•Proxy mode-2
Proxy mode-2 includes the benefits of transparent mode and proxy mode-1 but does not have the limitations of those modes. However, it does require that the administrator partition the SAN using VSANs. The host initiator and the DVT are in one VSAN while the VI and the target are in another VSAN. See Figure 40-4.
Figure 40-4 SANTap Proxy Mode-2 Example
Enabling SANTap
SANTap can be enabled on an entire SSM or it can be enabled on a group of four ports on an SSM. Enabling SANTap on interfaces has the following restrictions:
•The fewest number of interfaces which you can enable is four. You can specify fc1 through fc4 but not fc1 through fc2.
•The first interface in the group must be 1, 5, 9, 13, 17, 21, 25, or 29. You can specify fc5 through fc8 but not fc7 through fc10.
•The groups of four interfaces do not need to be consecutive. You can specify fc1 through fc8 and fc17 through fc20.
To enable the SANTap feature, follow these steps:
|
Command
|
Purpose
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Step 1
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switch# config t
switch(config)#
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Enters configuration mode.
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Step 2
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switch(config)# ssm enable feature santap
module 4
|
Enables the SANTap application on the entire SSM.
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switch(config)# no ssm enable feature santap
module 4
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Disables the SANTap application on the entire SSM in slot 4.
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switch(config)# no ssm enable feature santap
force module 4
|
Forces the switch to disable the SANTap application on the entire SSM in slot 4.
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Step 3
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switch(config)# ssm enable feature santap
interface fc 4/1 - 4
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Enables the SANTap application on ports 1 through 4 on the SSM.
Note Interfaces must be specified in multiples of four beginning at ports 1, 5, 9, 13, 17, 21, 25, and 29.
|
switch(config)# no ssm enable feature santap
interface fc 4/1 - 4
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Disables the SANTap application on ports 1 through 4 on the SSM in slot 4.
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switch(config)# no ssm enable feature santap
force interface fc 4/1 - 4
|
Forces the switch to disable the SANTap application on ports1 through 4 on the SSM in slot 4.
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Step 4
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switch(config)# santap module 4 appl-vsan 10
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Enables SANTap on the SSM in slot 4 and on VSAN 10.
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switch(config)# no santap module 4 appl-vsan 10
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Disables SANTap.
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Note You cannot simultaneously configure the intelligent services SANTap and NASB on a single SSM.
Displaying SANTap Information
Use the show santap module command to display information about SANTap (see Example 40-1 to Example 40-8).
Example 40-1 Displays SANTap Control Virtual Terminal Information
switch# show santap module 2 cvt
cvt pwwn = 25:3c:00:05:30:00:22:25
cvt nwwn = 25:3d:00:05:30:00:22:25
Example 40-2 Displays SANTap Data Virtual Terminal Information
switch# show santap module 2 dvt
dvt pwwn = 22:00:00:20:37:88:20:ef
dvt nwwn = 20:00:00:20:37:88:20:ef
Example 40-3 Displays SANTap Data Virtual Terminal LUN Information
switch# show santap module 2 dvtlun
dvt pwwn = 22:00:00:20:37:88:20:ef
tgt pwwn = 22:00:00:20:37:88:20:ef
Example 40-4 Displays SANTap Session Information
switch# show santap module 2 session
host pwwn = 21:00:00:e0:8b:07:61:aa
dvt pwwn = 22:00:00:20:37:88:20:ef
tgt pwwn = 00:00:00:00:00:00:00:00
adt pwwn = 77:77:77:77:77:77:77:77
Example 40-5 Displays SANTap Appliance Virtual Terminal Information
switch# show santap module 2 avt
avt pwwn = 2a:4b:00:05:30:00:22:25
avt nwwn = 2a:60:00:05:30:00:22:25
hi pwwn = 21:00:00:e0:8b:07:61:aa
tgt pwwn = 22:00:00:20:37:88:20:ef
Example 40-6 Displays SANTap Appliance Virtual Terminal LUN Information
switch# show santap module 2 avtlun
avt pwwn = 2a:4b:00:05:30:00:22:25
Example 40-7 Displays SANTap Remote Virtual Terminal Information
switch# show santap mod 2 rvt
rvt pwwn = 2a:61:00:05:30:00:22:25
rvt nwwn = 2a:62:00:05:30:00:22:25
Example 40-8 Displays SANTap Remote Virtual Terminal LUN Information
switch# show santap mod 2 rvtlun
rvt pwwn = 2a:61:00:05:30:00:22:25
app pwwn = 22:00:00:20:37:39:b1:00
Default Settings
Table 40-1 lists the default settings for Intelligent Storage Services parameters.
Table 40-1 Default Intelligent Storage Services Parameters
Parameters
|
Default
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SANTap feature
|
Disabled
|