Dear Sir,
I have cisco 837 ADSL router so sometimes suddenly no internet access (internet disconnect).
I entered to the router by console then ping to ISP's DNS ( public IP address) it's ok then ping to my laptop it's ok too but from my laptop to this public IP address no reply!!
I made continuous ping from my laptop to ISP's DNS ( public IP address) there was request timed out after I delete the NAT command and return it the ping changed from request timed out to reply !! so what is the problem? it's IOS problem, Hardware problem or RAM or what?
This is the configuration and what I did to solve the problem:
sh run
Building configuration...
Current configuration : 2006 bytes
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
memory-size iomem 5
enable secret 5 $1$Idzo$jLBd.1OKb.acRpU8dhsqr/
!
aaa new-model
!
!
aaa authentication login default local
aaa authentication login sdm_vpn_xauth_ml_1 local
aaa authorization exec default local
--More-- aaa authorization network sdm_vpn_group_ml_1 local
!
aaa session-id common
!
resource policy
!
ip subnet-zero
no ip dhcp use vrf connected
!
ip dhcp pool cisco
network 192.168.0.0 255.255.255.0
default-router 192.168.0.254
dns-server 65.162.184.33 65.162.184.34
!
!
ip cef
no ip ips deny-action ips-interface
!
!
!
username test privilege 15 secret 5 $1$zISo$n1r4KtszsxxGM8ni/48bV/
!
!
--More-- !
!
!
interface Ethernet0
ip address 192.168.0.254 255.255.255.0
ip nat inside
ip virtual-reassembly
ip tcp adjust-mss 1412
hold-queue 100 out
!
interface Ethernet2
no ip address
hold-queue 100 out
!
interface ATM0
no ip address
no atm ilmi-keepalive
dsl operating-mode auto
!
interface ATM0.1 point-to-point
pvc 8/35
pppoe-client dial-pool-number 1
!
--More-- !
interface FastEthernet1
duplex auto
speed auto
!
interface FastEthernet2
duplex auto
speed auto
!
interface FastEthernet3
duplex auto
speed auto
!
interface FastEthernet4
duplex auto
speed auto
!
interface Dialer0
ip address negotiated
ip mtu 1452
ip nat outside
ip virtual-reassembly
encapsulation ppp
--More-- dialer pool 1
dialer-group 1
ppp authentication chap pap callin
ppp chap hostname muneer1
ppp chap password 0 123456
ppp pap sent-username muneer1 password 0 123456
!
ip classless
ip route 0.0.0.0 0.0.0.0 Dialer0
ip http server
ip http authentication local
no ip http secure-server
!
ip nat inside source list 1 interface Dialer0 overload
!
access-list 1 permit 192.168.0.0 0.0.0.255
!
control-plane
!
!
line con 0
no modem enable
line aux 0
--More-- line vty 0 4
password 123456
!
scheduler max-task-time 5000
end
Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#no ip nat inside source list 1 interface Dialer0 overload
Dynamic mapping in use, do you want to delete all entries? [no]: y
Router(config)#ip nat inside source list 1 interface Dialer0 overload
Router(config)#^Z
Router#
Regards.
Muneer
muneer@yemen.net.ye
