ggsn#show run
Building configuration...

Current configuration : 1622 bytes
!
upgrade fpd auto
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
service gprs ggsn
!
hostname ggsn
!
boot-start-marker
boot-end-marker
!
logging message-counter syslog
!
no aaa new-model
ip source-route
ip cef
!
!
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.100.1
!
ip dhcp pool pool_gprs
   network 192.168.100.0 255.255.255.0
   dns-server 192.168.200.254 
!
!
no ip domain lookup
no ipv6 cef
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!         
!
!
archive
 log config
  hidekeys
! 
!
!
!
!
!
!
!
!
interface Loopback0
 ip address 192.168.100.1 255.255.255.0
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex half
!
interface FastEthernet1/0
 ip address 192.168.200.160 255.255.255.0
 ip nat outside
 ip virtual-reassembly
 duplex half
!
interface Virtual-Template1
 ip unnumbered FastEthernet1/0
 ip nat inside
 ip virtual-reassembly
 encapsulation gtp
 gprs access-point-list gprs
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 192.168.200.254
no ip http server
no ip http secure-server
!
!
ip nat inside source list 1 interface Virtual-Template1 overload
!
logging alarm informational
access-list 1 permit 192.168.100.0 0.0.0.255
!         
!
!
!
gprs access-point-list gprs
  access-point 1
   access-point-name cisco
   ip-address-pool dhcp-proxy-client  
   aggregate auto
   dhcp-server 192.168.100.1
   dhcp-gateway-address 192.168.100.1  
   !
  !
!
!
!
!
!
control-plane
!
!
!
!
!         
!
!
gatekeeper
 shutdown
!
!
line con 0
 exec-timeout 0 0
 stopbits 1
line aux 0
 stopbits 1
line vty 0 4
 login
!
end

ggsn#show version
Cisco IOS Software, 7200 Software (C7200-ADVENTERPRISEK9_MW-M), Version 12.4(20)T5, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Mon 08-Mar-10 11:24 by prod_rel_team

ROM: ROMMON Emulation Microcode
BOOTLDR: 7200 Software (C7200-ADVENTERPRISEK9_MW-M), Version 12.4(20)T5, RELEASE SOFTWARE (fc2)

ggsn uptime is 19 minutes
System returned to ROM by unknown reload cause - suspect boot_data[BOOT_COUNT] 0x0, BOOT_COUNT 0, BOOTDATA 19
System image file is "tftp://255.255.255.255/unknown"


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