PPPoE configured, no network

[mebaneke]

Hi,

We have a Cisco 2901 router running IOS 15.6. It was running fine in our current setup, but we are moving and our new ISP uses PPPoE. I think I configured that correctly, the dialer 1 interface gets an ip. However I believe I am missing something regarding NAT since

I cannot ping outside from the router (8.8.8.8)

I cannot ping from one device on the subnet to another

I can ping the router from each connected

I can ping the ip assigned to dialer1

I am by no means an expert at this so apologies in advance if I ask the wrong question or in the wrong place. If someone could have a look at my config that would be greatly appreciated.

PS I searched through the community here already and have compared my config to various other people having issues but can't work out what I am doing wrong.

Thanks in advance.

[Georg Pauwen · Accepted solution]

You have ip routing disabled. Enable this globally:

m2-rtr-02#conf t

m2-rtr-02(config)#ip routing

[mebaneke]

You sir, are a saint. And I am an idiot

[mebaneke]

Hmmm, looks like I was happy too soon.

I can ping google.com yahoo.com and some others, but some domains I can not.

When loading sites I can ping in a browser on a connected laptop they are very slow or don't work at all. This happens for cisco.com and arstechnica.

Any further clues?

[Georg Pauwen]

Hello,

Set the ip mtu on the dialer interface to 1492:

Interface Dialer1

Ip mtu 1492

[Georg Pauwen]

I have looked at your config again. The DHCP pool CORPORATE_WIFI_5GHZ is nowhere configured on the router, is this correct ?

Either way, I made a few changes to your config (marked in bold):

version 15.6
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname m2-rtr-02
!
boot-start-marker
boot-end-marker
!
no aaa new-model
!
ip routing
!
ip dhcp excluded-address 10.0.0.1 10.0.0.65
ip dhcp excluded-address 192.168.100.1 192.168.100.63
ip dhcp excluded-address 10.0.11.1 10.0.11.63
ip dhcp excluded-address 10.0.10.1 10.0.10.63
ip dhcp excluded-address 10.0.12.1 10.0.12.63
!
ip dhcp pool CORPORATE_WIFI_5GHZ
network 10.0.12.0 255.255.255.0
default-router 10.0.12.20
dns-server 8.8.8.8 8.8.4.4
lease 7
!
ip dhcp pool office
network 10.0.0.0 255.255.255.0
default-router 10.0.0.20
dns-server 8.8.8.8 8.8.4.4
lease 7
!
no ip domain lookup
ip domain name office.domain.com
ip name-server 10.0.0.20
ip name-server 8.8.8.8
ip name-server 8.8.4.4
no ip cef
no ipv6 cef
!
multilink bundle-name authenticated
!
interface Embedded-Service-Engine0/0
no ip address
no ip route-cache
shutdown
!
interface GigabitEthernet0/0
description Outside World
no ip address
no ip route-cache
duplex auto
speed auto
pppoe enable group global
pppoe-client dial-pool-number 10
!
interface GigabitEthernet0/1
ip address 10.0.0.20 255.255.255.0
ip nat inside
ip virtual-reassembly in
no ip route-cache
duplex auto
speed auto
no mop enabled
!
interface GigabitEthernet0/1.10
description --> Data vlan
encapsulation dot1Q 10
ip address 10.0.10.0 255.255.0.0
ip nat inside
ip virtual-reassembly in
no ip route-cache
!
interface Dialer1
mtu 1492
ip address negotiated
ip nat outside
ip virtual-reassembly in
encapsulation ppp
dialer pool 10
dialer-group 10
ppp authentication pap callin
ppp pap sent-username USERNAME password 0 PASSWORD
--> no ppp ipcp route default
!
ip forward-protocol nd
!
ip http server
ip http port 8080
ip http access-class 20
ip http authentication local
ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
!
ip dns server
ip nat inside source route-map ISP interface Dialer1 overload
ip route 0.0.0.0 0.0.0.0 Dialer1
ip ssh version 2
!
dialer-list 10 protocol ip permit
!
snmp-server community public RO
access-list 1 permit 10.0.0.0 0.0.0.255
!
route-map ISP permit 10
match ip address 1
match interface Dialer 1
!
control-plane
!
vstack
!
line con 0
login local
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
stopbits 1
line vty 0 4
access-class 20 in
login local
transport input ssh
!
scheduler allocate 20000 1000
!
end

[mebaneke]

Never mind. I have the same issues when connecting a laptop directly to the ISPs modem, so it is probably on their end

[Georg Pauwen]

Which modem model do you have?