Cisco 881 routing no internet

[murmucka]

Hi,

Router is connected to providers modem (simple DHCP, no pppoe or fix ip needed)

But no internetconnection.

Building configuration...

Current configuration : 2441 bytes
!
! Last configuration change at 11:32:01 UTC Mon May 30 2022
!
version 15.4
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname GW-ZIMBOHU_01
!
boot-start-marker
boot-end-marker
!
aqm-register-fnf
!
enable secret 5 ***
enable password 7 ***
!
no aaa new-model
clock timezone UTC 1 0
!
!
!
!
!
!
!
!


!
!
!
!
ip name-server 1.1.1.1
ip name-server 8.8.8.8
ip cef
login on-success log
no ipv6 cef
!
!
!
!
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
license udi pid C881-K9 sn FCZ1915939G
license boot module c800 level advipservices
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
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interface FastEthernet0
 switchport access vlan 10
 no ip address
!
interface FastEthernet1
 no ip address
 shutdown
!
interface FastEthernet2
 no ip address
 shutdown
!
interface FastEthernet3
 switchport trunk native vlan 99
 switchport mode trunk
 no ip address
!
interface FastEthernet4
 description InternetUplink
 ip address dhcp
 ip nat outside
 ip virtual-reassembly in
 no ip route-cache
 duplex auto
 speed auto
 no cdp enable
!
interface Vlan1
 no ip address
 shutdown
!
interface Vlan10
 description *** ClientPrinter ***
 ip address 10.0.10.2 255.255.255.0
 ip nat inside
 ip virtual-reassembly in
!
interface Vlan99
 description *** Management ***
 ip address 10.0.99.2 255.255.255.0
 ip nat inside
 ip virtual-reassembly in
!
interface Dialer1
 ip address dhcp
 ip nat outside
 ip virtual-reassembly in
 dialer pool 1
 dialer idle-timeout 0
 dialer persistent
 dialer-group 1
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
!
ip dns server
ip nat inside source list 11 interface Dialer1 overload
ip route 0.0.0.0 0.0.0.0 FastEthernet4
!
dialer-list 1 protocol ip permit
!
snmp-server community public RO
access-list 11 remark define internal networks
access-list 11 permit 10.0.10.0 0.0.0.255
access-list 11 permit 10.0.99.0 0.0.0.255
!
control-plane
!
!
mgcp behavior rsip-range tgcp-only
mgcp behavior comedia-role none
mgcp behavior comedia-check-media-src disable
mgcp behavior comedia-sdp-force disable
!
mgcp profile default
!
!
!
!
!
!
!
line con 0
 no modem enable
line aux 0
line vty 0 4
 password 7 ***
 login
 transport input none
!
scheduler allocate 20000 1000
ntp server 0.ciscome.pool.ntp.org minpoll 10
ntp server 1.ciscome.pool.ntp.org
ntp server 2.ciscome.pool.ntp.org minpoll 10
!
end

[Flavio Miranda · Accepted solution]

Hi

ip route 0.0.0.0 0.0.0.0 FastEthernet4

If this interface is a Layer 2 interface, this is not going to work.

Change to:

ip route 0.0.0.0 0.0.0.0  IP default gateway

[paul driver · Accepted solution]

Hello
As you say the rtr isn't a pppoe client then there is no requirement for dialer interface, Can you reach the internet from the rtr iself, do you obtain an ip allocation?

sh ip interface brief

Also remote the static default route and append it to the dhcp allocation, 

no ip route 0.0.0.0 0.0.0.0 FastEthernet4
ip route 0.0.0.0 0.0.0.0 FastEthernet4 dhcp