Cisco MDS 9000 Family Configuration Guide, Release 2.x
Configuring SANTap
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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

Step 1 

switch# config t

switch(config)#

Enters configuration mode.

Step 2 

switch(config)# ssm enable feature santap module 4

Enables the SANTap application on the entire SSM.

switch(config)# no ssm enable feature santap module 4

Disables the SANTap application on the entire SSM in slot 4.

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.

Step 3 

switch(config)# ssm enable feature santap interface fc 4/1 - 4

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

Disables the SANTap application on ports 1 through 4 on the SSM in slot 4.

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.

Step 4 

switch(config)# santap module 4 appl-vsan 10

Enables SANTap on the SSM in slot 4 and on VSAN 10.

switch(config)# no santap module 4 appl-vsan 10

Disables SANTap.

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 Information :

        cvt pwwn     = 25:3c:00:05:30:00:22:25

        cvt nwwn     = 25:3d:00:05:30:00:22:25

        cvt id       = 1

        cvt xmap_id  = 2

        cvt vsan     = 10

Example 40-2 Displays SANTap Data Virtual Terminal Information 

switch# show santap module 2 dvt


 DVT Information :

        dvt pwwn     = 22:00:00:20:37:88:20:ef

        dvt nwwn     = 20:00:00:20:37:88:20:ef

        dvt id       = 3

        dvt mode     = 3

        dvt vsan     = 3

        dvt fp_port  = 0

        dvt if_index = 0x1080000

        dvt name     = MYDVT

Example 40-3 Displays SANTap Data Virtual Terminal LUN Information 

switch# show santap module 2 dvtlun


 DVT LUN Information :

        dvt pwwn     = 22:00:00:20:37:88:20:ef

        dvt lun      = 0x0

        xmap id      = 8

        dvt id       = 3

        dvt mode     = 0

        dvt vsan     = 3

        tgt pwwn     = 22:00:00:20:37:88:20:ef

        tgt lun      = 0x0

        tgt vsan     = 1

Example 40-4 Displays SANTap Session Information 

switch# show santap module 2 session


 Session Information :

        session id    = 1

        host pwwn     = 21:00:00:e0:8b:07:61:aa

        dvt pwwn      = 22:00:00:20:37:88:20:ef

        dvt lun       = 0x0

        tgt pwwn      = 00:00:00:00:00:00:00:00

        tgt lun       = 0x0

        adt pwwn      = 77:77:77:77:77:77:77:77

        adt lun       = 0x0

        num ranges    = 0

        dvt id        = 0

        vdisk id      = 0

        session state = 0

        mrl requested = 1

        pwl requested = 1

        iol requested = 0

Example 40-5 Displays SANTap Appliance Virtual Terminal Information 

switch# show santap module 2 avt


 AVT Information :

        avt pwwn     = 2a:4b:00:05:30:00:22:25

        avt nwwn     = 2a:60:00:05:30:00:22:25

        avt id       = 12

        avt vsan     = 4

        avt if_index = 0x1080000

        hi pwwn      = 21:00:00:e0:8b:07:61:aa

        tgt pwwn     = 22:00:00:20:37:88:20:ef

        tgt vsan     = 1

Example 40-6 Displays SANTap Appliance Virtual Terminal LUN Information 

switch# show santap module 2 avtlun


 AVT LUN Information :

        avt pwwn     = 2a:4b:00:05:30:00:22:25

        avt lun      = 0x0

        xmap id      = 16

        avt id       = 12

        tgt lun      = 0x0

Example 40-7 Displays SANTap Remote Virtual Terminal Information 

switch# show santap mod 2 rvt


 RVT Information :

        rvt pwwn     = 2a:61:00:05:30:00:22:25

        rvt nwwn     = 2a:62:00:05:30:00:22:25

        rvt id       = 17

        rvt vsan     = 4

        rvt if_index = 0x1080000

Example 40-8 Displays SANTap Remote Virtual Terminal LUN Information 

switch# show santap mod 2 rvtlun


 RVT LUN Information :

        rvt pwwn     = 2a:61:00:05:30:00:22:25

        rvt lun      = 0x0

        xmap id      = 22

        rvt id       = 17

        app pwwn     = 22:00:00:20:37:39:b1:00

        app lun      = 0x0

        app vsan     = 1

Default Settings

Table 40-1 lists the default settings for Intelligent Storage Services parameters.

Table 40-1 Default Intelligent Storage Services Parameters 

Parameters
Default

SANTap feature

Disabled