Question : Cisco PtP VPN

i have below router config, i want both setup as VPN tunneling, how to setup two different moel with VPN point to point setup?

CISCO870 Router

#sh ver
Cisco IOS Software, C870 Software (C870-ADVIPSERVICESK9-M), Version 12.4(15)T7,
RELEASE SOFTWARE (fc3)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2008 by Cisco Systems, Inc.
Compiled Thu 14-Aug-08 07:43 by prod_rel_team

ROM: System Bootstrap, Version 12.3(8r)YI4, RELEASE SOFTWARE
ill uptime is 2 days, 8 hours, 4 minutes
System returned to ROM by power-on
System image file is "flash:c870-advipservicesk9-mz.124-15.T7.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
[email protected].

Cisco 871 (MPC8272) processor (revision 0x300) with 118784K/12288K bytes of memo
ry.
Processor board ID FHK131723X7
MPC8272 CPU Rev: Part Number 0xC, Mask Number 0x10
5 FastEthernet interfaces
128K bytes of non-volatile configuration memory.
28672K bytes of processor board System flash (Intel Strataflash)

Configuration register is 0x2102

#sh flash
28672K bytes of processor board System flash (Intel Strataflash)

Directory of flash:/

    2  -rwx    18950320   --- -- ---- --:--:-- -----  c870-advipservicesk9-mz.12
4-15.T7.bin
    3  -rwx        3179   Mar 1 2002 00:04:14 +00:00  sdmconfig-8xx.cfg
    4  -rwx      931840   Mar 1 2002 00:04:32 +00:00  es.tar
    5  -rwx     1505280   Mar 1 2002 00:04:58 +00:00  common.tar
    6  -rwx        1038   Mar 1 2002 00:05:10 +00:00  home.shtml
    7  -rwx      112640   Mar 1 2002 00:05:21 +00:00  home.tar

27611136 bytes total (6098944 bytes free)
#



Cisco2800 Router

#sh ver
Cisco IOS Software, 2801 Software (C2801-ADVSECURITYK9-M), Version 12.4(3i), REL
EASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Wed 28-Nov-07 22:08 by stshen

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

AID uptime is 1 week, 6 days, 10 hours, 7 minutes
System returned to ROM by power-on
System image file is "flash:c2801-advsecurityk9-mz.124-3i.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
[email protected].

Cisco 2801 (revision 7.0) with 234496K/27648K bytes of memory.
Processor board ID FTX1220W0JX
2 FastEthernet interfaces
1 Virtual Private Network (VPN) Module
DRAM configuration is 64 bits wide with parity disabled.
191K bytes of NVRAM.
62720K bytes of ATA CompactFlash (Read/Write)

Configuration register is 0x2102

#sh flash
-#- --length-- -----date/time------ path
1     18715120 May 15 2008 20:27:40 +00:00 c2801-advsecurityk9-mz.124-3i.bin
2         2746 May 15 2008 20:45:26 +00:00 sdmconfig-2801.cfg
3       931840 May 15 2008 20:45:46 +00:00 es.tar
4      1505280 May 15 2008 20:46:10 +00:00 common.tar
5         1038 May 15 2008 20:46:32 +00:00 home.shtml
6       112640 May 15 2008 20:46:50 +00:00 home.tar
7       527849 May 15 2008 20:47:12 +00:00 128MB.sdf
8      1697952 May 15 2008 20:47:44 +00:00 securedesktop-ios-3.1.1.45-k9.pkg
9       415956 May 15 2008 20:48:12 +00:00 sslclient-win-1.1.4.176.pkg

40083456 bytes available (23928832 bytes used)
#

Answer : Cisco PtP VPN

Don't know if it helps but I was using Cisco's SDM (Web/GUI) Tool to check out the VPN Options on my 877 last night and there was an option to use that to configure site to site VPN.