I was curious about this issue, so I looked at one of our 2821's with the security bundle in it.  Sure enough, it shows in the output of SHOW VERSION that there are two VPN modules.  However, in the output of SHOW DIAG I only see one VPN module in slot 0.

I then checked this document.  https://www.cisco.com/en/US/docs/routers/access/2800/hardware/installation/guide/10_hw.html#wp1109723

In the section on verifying the AIM installation, the output of SHOW VERSION shows that there is only one VPN module.

Post the full "show diag" here.

You can edit SN # if worried about that.

There are "show crypto" commnds that tell you which HW is being used.

#sh ver
Cisco IOS Software, 2800 Software (C2800NM-ADVIPSERVICESK9-M), Version 12.4(9)T3, RELEASE SOFTWARE (fc3)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Fri 23-Mar-07 18:35 by prod_rel_team

ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)

xxxxx uptime is x weeks, x days, x hours, x minutes
System returned to ROM by power-on
System restarted at 12:55:27 CDT Wed Jun 17 2009
System image file is "flash:c2800nm-advipservicesk9-mz.124-9.T3.bin"

This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to
export@cisco.com.

Cisco 2821 (revision 53.51) with 249856K/12288K bytes of memory.
Processor board ID xxxxxxx
2 Gigabit Ethernet interfaces
2 Serial interfaces
2 Channelized T1/PRI ports
2 Virtual Private Network (VPN) Modules
DRAM configuration is 64 bits wide with parity enabled.
239K bytes of non-volatile configuration memory.
250880K bytes of ATA CompactFlash (Read/Write)

Configuration register is 0x2102

sh diag
Slot 0:
        C2821 Motherboard with 2GE and integrated VPN Port adapter, 2 ports
        Port adapter is analyzed
        Port adapter insertion time unknown
        Onboard VPN             : v2.2.0
        EEPROM contents at hardware discovery:
        PCB Serial Number        : xxxxxxxxxxx
        Hardware Revision        : 1.0
        Top Assy. Part Number    : 800-26921-02
        Board Revision           : A0
        Deviation Number         : 0
        Fab Version              : 03
        RMA Test History         : 00
        RMA Number               : 0-0-0-0
        RMA History              : 00
        Processor type           : 87
        Hardware date code       : 20070329
        Chassis Serial Number    : xxxxxxxxxx
        Chassis MAC Address      : xxxxxxxxxx
        MAC Address block size   : 32
        CLEI Code                : COM3D00BRA
        Product (FRU) Number     : CISCO2821
        Part Number              : 73-8853-04
        Version Identifier       : V03
        EEPROM format version 4
        EEPROM contents (hex):
          0x00: 04 FF C1 8B 46 4F 43 31 31 31 31 32 48 4B 34 40
          0x10: 03 E8 41 01 00 C0 46 03 20 00 69 29 02 42 41 30
          0x20: 88 00 00 00 00 02 03 03 00 81 00 00 00 00 04 00
          0x30: 09 87 83 01 32 3F B9 C2 8B 46 54 58 31 31 31 37
          0x40: 41 33 53 46 C3 06 00 1B 54 44 77 B0 43 00 20 C6
          0x50: 8A 43 4F 4D 33 44 30 30 42 52 41 CB 8F 43 49 53
          0x60: 43 4F 32 38 32 31 20 20 20 20 20 20 82 49 22 95
          0x70: 04 89 56 30 33 20 D9 02 40 C1 FF FF FF FF FF FF

        WIC Slot 0:
        VWIC2-2MFT-T1/E1 - 2-Port RJ-48 Multiflex Trunk - T1/E1
        Hardware Revision        : 0.0
        Top Assy. Part Number    : 800-22629-05
        Board Revision           : B0
        Deviation Number         : 0
        Fab Version              : 04
        PCB Serial Number        : xxxxxxxxxxxxx
        RMA Test History         : 00
        RMA Number               : 0-0-0-0
        RMA History              : 00
        Product (FRU) Number     : VWIC2-2MFT-T1/E1
        Version Identifier       : V01
        EEPROM format version 4
        EEPROM contents (hex):
          0x00: 04 FF 40 03 FC 41 00 00 C0 46 03 20 00 58 65 05
          0x10: 42 42 30 88 00 00 00 00 02 04 C1 8B 46 4F 43 31
          0x20: 31 31 36 34 4D 41 41 03 00 81 00 00 00 00 04 00
          0x30: CB 90 56 57 49 43 32 2D 32 4D 46 54 2D 54 31 2F
          0x40: 45 31 89 56 30 31 20 D9 02 40 C1 FF FF FF FF FF
          0x50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
          0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
          0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

        AIM Module in slot: 0
        Hardware Revision        : 1.0
        Top Assy. Part Number    : 800-27059-01
        Board Revision           : A0
        Deviation Number         : 0-0
        Fab Version              : 02
        PCB Serial Number        : xxxxxxxxxxx
        RMA Test History         : 00
        RMA Number               : 0-0-0-0
        RMA History              : 00
        Product (FRU) Number     : AIM-VPN/SSL-2
        Version Identifier       : V01
        EEPROM format version 4
        EEPROM contents (hex):
          0x00: 04 FF 40 04 F4 41 01 00 C0 46 03 20 00 69 B3 01
          0x10: 42 41 30 80 00 00 00 00 02 02 C1 8B 46 4F 43 31
          0x20: 31 31 32 33 56 52 37 03 00 81 00 00 00 00 04 00
          0x30: CB 8D 41 49 4D 2D 56 50 4E 2F 53 53 4C 2D 32 89
          0x40: 56 30 31 00 D9 02 40 C1 FF FF FF FF FF FF FF FF
          0x50: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
          0x60: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
          0x70: FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

You have an optional VPN module installed:

AIM Module in slot: 0

        Hardware Revision        : 1.0

        Top Assy. Part Number    : 800-27059-01

        Board Revision           : A0

        Deviation Number         : 0-0

        Fab Version              : 02

        PCB Serial Number        : xxxxxxxxxxx

        RMA Test History         : 00

        RMA Number               : 0-0-0-0

        RMA History              : 00

        Product (FRU) Number     : AIM-VPN/SSL-2

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What for? Show diag above is clear enough.

Hi Paolo,

If I read this correctly, the router has TWO (2) AIM-VPN, is this correct? 

No, it has one.

Thank U Sir

You are welcome.

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