Hallo ich brauch mal Hilfe  
Habe mir zwei Router cisco 801 zugelegt dies habe ich neu configuriert. 
Die Conf hat eine Woche lang gut Funktionier. 
danach war der Router nicht mehr erreichbar und verteilt auch keine IP an die Clients 
  
hier die Configuration 
  
Cisco Internetwork Operating System Software  
IOS  C800 Software (C800-Y6-MW), Version 12.0(5)T,  RELEASE SOFTWARE (fc1) 
Copyright © 1986-1999 by cisco Systems, Inc. 
Compiled Fri 23-Jul-99 01:30 by kpma 
Image text-base: 0x000E9000, data-base: 0x00595000 
  
ROM: TinyROM version 1.2(2) 
***** uptime is 5 minutes 
System returned to ROM by power-on 
System restarted at 13:30:02 UTC Sun Jan 8 2006 
System image file is "flash:c800-y6-mw.120-5.T" 
  
Cisco C801 (MPC850) processor (revision 1) with 43112K bytes of virtual memory. 
Processor board ID JAD041008TZ 
CPU part number 33 
Bridging software. 
Basic Rate ISDN software, Version 1.1. 
1 Ethernet/IEEE 802.3 interface(s) 
1 ISDN Basic Rate interface(s) 
4M bytes of physical memory (DRAM) 
8K bytes of non-volatile configuration memory 
8M bytes of flash on board (4M from flash card) 
  
Configuration register is 0x2102 
  
  
------------------ show running-config ------------------ 
  
  
Building configuration... 
  
Current configuration: 
! 
! Last configuration change at 13:35:32 UTC Sun Jan 8 2006 
! NVRAM config last updated at 13:34:26 UTC Sun Jan 8 2006 
! 
version 12.0 
no service pad 
service timestamps debug uptime 
service timestamps log uptime 
service password-encryption 
! 
hostname ****** 
! 
logging buffered 8192 debugging 
enable secret 5 <removed> 
! 
username ***** password 7 <removed> 
! 
! 
! 
! 
ip subnet-zero 
no ip source-route 
! 
ip dhcp pool DHCPPoolLAN_0 
   network 192.168.0.0 255.255.255.0 
   dns-server 145.253.2.11 145.253.2.75  
   default-router 192.168.0.1  
! 
ip name-server 145.253.2.11 
ip name-server 145.253.2.75 
isdn switch-type basic-net3 
! 
! 
process-max-time 200 
! 
interface Ethernet0 
 ip address 192.168.0.1 255.255.255.0 
 ip access-group 121 in 
 no ip directed-broadcast 
 no ip proxy-arp 
 ip nat inside 
! 
interface BRI0 
 no ip address 
 no ip directed-broadcast 
 encapsulation ppp 
 dialer pool-member 1 
 isdn switch-type basic-net3 
 ppp authentication chap pap callin 
! 
interface Dialer1 
 description ISP 
 ip address negotiated 
 ip access-group 121 in 
 no ip directed-broadcast 
 no ip proxy-arp 
 ip nat outside 
 encapsulation ppp 
 no ip split-horizon 
 dialer remote-name Cisco1 
 dialer idle-timeout 60 
 dialer string 01920785 class DialClass 
 dialer hold-queue 10 
 dialer pool 1 
 dialer-group 1 
 ppp authentication chap pap callin 
 ppp chap hostname ***** 
 ppp chap password ***** 
 ppp pap sent-username ***** password ***** 
! 
ip nat inside source list 18 interface Dialer1 overload 
no ip http server 
ip classless 
ip route 0.0.0.0 0.0.0.0 Dialer1 
! 
! 
map-class dialer DialClass 
 dialer isdn short-hold 120 
access-list 18 permit 192.168.0.0 0.0.0.255 
access-list 121 deny   udp any eq netbios-dgm any 
access-list 121 deny   udp any eq netbios-ns any 
access-list 121 deny   udp any eq netbios-ss any 
access-list 121 deny   tcp any eq 137 any 
access-list 121 deny   tcp any eq 138 any 
access-list 121 deny   tcp any eq 139 any 
access-list 121 permit ip any any time-range TIME 
dialer-list 1 protocol ip permit 
! 
line con 0 
 exec-timeout 120 0 
 transport input none 
 stopbits 1 
line vty 0 4 
 exec-timeout 0 0 
 login local 
! 
time-range TIME 
 periodic daily 0:00 to 23:59 
! 
end 
  
Beim ersten Router dacht ich es ist ein Hardware-Fehler  
da der zweite jedoch die gleichen Symtome zeigt kann es wohl kein Hardwaredefekt sein 
Was mache ich falsch ??