My network was upgraded from 100Mbps to 1000Mbps recently, thus I changed from 1841 to 1921
But seems some problems on 1921, it keeps disconnecting from internet.
For short, it can run for 10-30mins then lost internet connection.
I tried to ping 8.8.8.8 on 1921 but failed when i found my PC internet lost.
There are two ways to get the internet back
1: reload command
2: go to interface g0/0, key in ip address dhcp
G0/0 ---connect to a Fiber modem, use DHCP
G0/1 ---connect to a cisco 2960CG-8TC
no idea how to trouble shooting .
below is the show run output
---------------------------------------------
Building configuration...
Current configuration : 2180 bytes
!
! Last configuration change at 09:50:48 UTC Wed Mar 7 2018
version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname HOMERT01
!
boot-start-marker
boot-end-marker
!
!
enable secret 5 XXXXXXX
enable password XXXXXXX
!
no aaa new-model
!
no ipv6 cef
ip source-route
ip cef
!
!
!
ip dhcp excluded-address 192.168.1.1
ip dhcp excluded-address 192.168.1.2
ip dhcp excluded-address 192.168.1.3
!
ip dhcp pool HOME
network 192.168.1.0 255.255.255.0
dns-server 192.168.1.1
default-router 192.168.1.1
!
!
no ip domain lookup
multilink bundle-name authenticated
!
crypto pki token default removal timeout 0
!
!
license udi pid CISCO1921/K9 sn XXXXXXXX
!
!
!
!
!
!
!
!
interface Embedded-Service-Engine0/0
no ip address
shutdown
!
interface GigabitEthernet0/0
ip dhcp client update dns
ip address dhcp
ip nat outside
ip virtual-reassembly in
duplex full
speed 1000
no cdp enable
!
interface GigabitEthernet0/1
ip address 192.168.1.1 255.255.255.0
ip nat inside
ip virtual-reassembly in
duplex auto
speed auto
no mop enabled
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
ip nat inside source list 11 interface GigabitEthernet0/0 overload
ip route 0.0.0.0 0.0.0.0 XXX.XXX.XXX.XXX 254
!
access-list 11 permit 192.168.1.0 0.0.0.255
!
!
!
control-plane
!
!
!
line con 0
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport input all
transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
stopbits 1
line vty 0 4
password XXXXXX
login
transport input all
!
scheduler allocate 20000 1000
end
