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Cisco Employee

INTERNET is not working while VPN ON

Here is a sample LAN-to-LAN vpn configuration between 2 IOS routers:

and yes, it works the same as NEM.

You can downgrade it by just tftp the image to the router, and configure the "boot system flash:"

Then "wr mem", and reload the router.


INTERNET is not working while VPN ON


I have try the same config in another IOS version, still same issue, cannot access the Internet. for the LAN-to LAN both location need routerble IP, in my case I have only one routerble IP at HO, and need a solution using HO IP. any idea..

ADSL#show version
Cisco IOS Software, C870 Software (C870-ADVIPSERVICESK9-M), Version 12.4(15)T1, RELEASE SOFTWARE (fc2)
Technical Support:
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Wed 18-Jul-07 16:47 by prod_rel_team

ROM: System Bootstrap, Version 12.3(8r)YI4, RELEASE SOFTWARE

ADSL uptime is 8 minutes
System returned to ROM by power-on
System image file is "flash:c870-advipservicesk9-mz.124-15.T1.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:

If you require further assistance please contact us by sending email to

Cisco 877 (MPC8272) processor (revision 0x200) with 118784K/12288K bytes of memory.
Processor board ID FCZ1125247P
MPC8272 CPU Rev: Part Number 0xC, Mask Number 0x10
4 FastEthernet interfaces
1 ATM interface
128K bytes of non-volatile configuration memory.
24576K bytes of processor board System flash (Intel Strataflash)

Configuration register is 0x2102

Cisco Employee

INTERNET is not working while VPN ON

Here is a sample config for dynamic to static LAN-to-LAN VPN tunnel:


INTERNET is not working while VPN ON

I would recommend using a standard ACL for your split tunneled ACL

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