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Matt Morrow
Asked: 2017-03-26 08:26:08 +0800 CST

Cisco 1811w routing issues

  • 772

I have a Cisco 1811w and I'm just trying to get a basic configuring for now. I'm using cable internet (TWC) on fa0 (just regular internal dhcp for now, no bridging done yet) and fa1 as the internal 10.0.0.0/24

PCs connected to fa1 do get handed dhcp and the router settings, but nothing can ping, either on the PC or in the router. Not sure what I'm doing wrong.

The ping test from within the router:

Router#ping 8.8.8.8
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

IP info:

FastEthernet0              192.168.0.5     YES DHCP   up                    up      
FastEthernet1              10.0.0.1        YES NVRAM  up                    down (nothing plugged into 1 at the moment)

Running-config:

Current configuration : 1758 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
enable secret 5 $1$NMgE$p0dWLAM1aVTRcqnrIL2Vu1
!
no aaa new-model
!
!
dot11 syslog
!
!
ip cef
no ip dhcp use vrf connectedip dhcp excluded-address 10.0.0.1 10.0.0.10
!         
ip dhcp pool Lan1DHCP
   import all
   network 10.0.0.0 255.255.255.0
   default-router 10.0.0.1 
   dns-server 10.0.0.1 8.8.8.8 8.8.4.4 
!         
!         
!         
multilink bundle-name authenticated
!         
!         
!         
!         
archive   
 log config
  hidekeys
!         
!         
!         
!         
!         
interface Dot11Radio0
 no ip address
 shutdown 
 speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0 54.0
 station-role root
!         
interface Dot11Radio1
 no ip address
 shutdown 
 speed basic-6.0 9.0 basic-12.0 18.0 basic-24.0 36.0 48.0 54.0
 station-role root
!         
interface FastEthernet0
 ip address dhcp
 ip nat outside
 ip virtual-reassembly
 duplex auto
 speed auto
!         
interface FastEthernet1
 ip address 10.0.0.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly
 duplex auto
 speed auto
!         
interface FastEthernet2
!         
interface FastEthernet3
!         
interface FastEthernet4
!         
interface FastEthernet5
!         
interface FastEthernet6
!         
interface FastEthernet7
!         
interface FastEthernet8
!         
interface FastEthernet9
!         
interface Vlan1
 no ip address
!         
interface Async1
 no ip address
 encapsulation slip
!         
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 FastEthernet0
!         
!         
no ip http server
no ip http secure-server
ip nat inside source list 101 interface FastEthernet0 overload
!         
access-list 101 permit ip 10.0.0.0 0.0.0.255 any
cisco

2 Answers

  1. Best Answer

    @MarkoPolo is right. There's problem with default gateway. But I think you should use default gateway, which Cisco can get from​ your ISP via DHCP:

    ip route 0.0.0.0 0.0.0.0 dhcp
    • 2

  2. If it will help anyone else, my config is:

    version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Router ! boot-start-marker boot-end-marker ! enable secret 5 $1$XweJ$NMtNuu/R4emfBU0rpjamg1 ! no aaa new-model ! ! dot11 syslog ! ! ip cef no ip dhcp use vrf connected ip dhcp excluded-address 10.0.0.1 10.0.0.10 !
    ip dhcp pool Lan1DHCP import all network 10.0.0.0 255.255.255.0 default-router 10.0.0.1 dns-server 8.8.8.8 8.8.4.4 !
    !
    !
    multilink bundle-name authenticated !
    !
    !
    !
    archive
    log config hidekeys !
    !
    !
    !
    !
    interface Dot11Radio0 no ip address shutdown speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0 54.0 station-role root !
    interface Dot11Radio1 no ip address shutdown speed basic-6.0 9.0 basic-12.0 18.0 basic-24.0 36.0 48.0 54.0 station-role root !
    interface FastEthernet0 ip address dhcp ip nat outside ip virtual-reassembly duplex auto speed auto !
    interface FastEthernet1 ip address 10.0.0.1 255.255.255.0 ip nat inside ip virtual-reassembly duplex auto speed auto !
    interface FastEthernet2 !
    interface FastEthernet3 !
    interface FastEthernet4 !
    interface FastEthernet5 !
    interface FastEthernet6 !
    interface FastEthernet7 !
    interface FastEthernet8 !
    interface FastEthernet9 !
    interface Vlan1 no ip address !
    interface Async1 no ip address encapsulation slip !
    ip forward-protocol nd ip route 0.0.0.0 0.0.0.0 dhcp !
    !
    no ip http server no ip http secure-server ip nat inside source list 101 interface FastEthernet0 overload !
    access-list 101 permit ip 10.0.0.0 0.0.0.255 any !
    !
    !
    !
    !
    !
    control-plane !
    !
    line con 0 line 1
    modem InOut stopbits 1 speed 115200 flowcontrol hardware line aux 0 line vty 0 4 login
    !
    end

    • 0