1841 PPPOE - Static ip configuration issues - No Connectivity to ISP

[Melvinb1981]

Good Day, 

Hoping for assistance,

I have a Cisco 1841 Router that i want to connect up to my ISP modem. (They requested my Mac Address of the original Router Not Cisco - I have however cloned the Mac Address to my Cisco router trying to rule that out as an issue - Wanting to use this instead of the ISP provided router.) 

I have also tried using both chap and pap , running debug commands this should allow some sort of indication if its an authentication issue but no display of errors. 

I have not configured any nat configurations as of yet im literally trying to ping any address within the console port

What has been provided from the ISP side is the following:

• Static IP Address
• Subnet Mask
• Gateway
• DNS Settings
• PPPOE Username & Password

Router#show run

Router#show running-config

Building configuration...

Current configuration : 1295 bytes

!

! Last configuration change at 12:11:18 UTC Mon Jan 2 2006

! NVRAM config last updated at 12:11:06 UTC Mon Jan 2 2006

! NVRAM config last updated at 12:11:06 UTC Mon Jan 2 2006

version 15.1

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname Router

!

boot-start-marker

boot-end-marker

!

!

!

no aaa new-model

!

dot11 syslog

ip source-route

!

!

!

!

!

ip cef

no ipv6 cef

!

multilink bundle-name authenticated

!

crypto pki token default removal timeout 0

!

!

!

!

license udi pid CISCO1841 sn FCZ094020LM

!

redundancy

!

!

controller T1 0/0/0

!

controller T1 0/0/1

!

!

!

!

!

!

!

!

interface FastEthernet0/0

 no ip address

 duplex auto

 speed auto

 pppoe enable group global

 pppoe-client dial-pool-number 10

!

interface FastEthernet0/1

 no ip address

 shutdown

 duplex auto

 speed auto

!

interface Dialer1

 ip address *.*.*.* 255.255.254.0

 encapsulation ppp

 dialer pool 10

 ppp authentication pap callin

 ppp pap sent-username ***************@du.ae password 0 *****************

 ppp ipcp route default

!

ip forward-protocol nd

no ip http server

no ip http secure-server

!

!

!

disable-eadi

!

!

!

!

!

!

control-plane

!

!

!

line con 0

line aux 0

line vty 0 4

 login

 transport input all

!

scheduler allocate 20000 1000

end

Router#

[Georg Pauwen]

Hello,

this only works when you put the modem in bridge mode, effectively making the 1841 the edge device.

It would be easier to configure double NAT as below:

version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
no aaa new-model
!
dot11 syslog
ip source-route
!
ip cef
no ipv6 cef
!
multilink bundle-name authenticated
!
crypto pki token default removal timeout 0
!
license udi pid CISCO1841 sn FCZ094020LM
!
redundancy
!
controller T1 0/0/0
!
controller T1 0/0/1
!
interface FastEthernet0/0
description Uplink to Modem
no ip dhcp
ip nat outside
duplex auto
speed auto
!
interface FastEthernet0/1
description LAN Interface
ip address 192.168.1.1 255.255.255.0
ip nat inside
duplex auto
speed auto
!
ip nat inside source list 1 interface FastEthernet0/0 overload
!
ip route 0.0.0.0 0.0.0.0 FastEthernet0/0 dhcp
!
access-list 1 permit 192.168.1.0
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
disable-eadi
!
control-plane
!
line con 0
line aux 0
line vty 0 4
login
transport input all
!
scheduler allocate 20000 1000
end

[Melvinb1981]

Thanks for the reply but i do not want to use the isp provided router.

[Georg Pauwen]

Hello,

Are the ISP modem and the ISP router two different devices or the same device ? I am asking because in your original post you said that you wanted to connect the 1841 to the modem...

So basically you want the Ethernet from the ISP to go directly into the 1841 ?

[Georg Pauwen]

Hello,

I have looked at your config again, try and add the lines marked in bold:

version 15.1
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
no aaa new-model
!
dot11 syslog
ip source-route
!
ip cef
no ipv6 cef
!
multilink bundle-name authenticated
!
crypto pki token default removal timeout 0
!
license udi pid CISCO1841 sn FCZ094020LM
!
redundancy
!
controller T1 0/0/0
!
controller T1 0/0/1
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
pppoe enable group global
pppoe-client dial-pool-number 10
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Dialer1
ip address *.*.*.* 255.255.254.0
ip nat outside
ip virtual-reassembly
ip mtu 1492
encapsulation ppp
ip tcp adjust-mss 1452
dialer pool 10
dialer-group 1
ppp chap hostname yourname@du.ae
ppp chap password password
ppp authentication pap callin
ppp pap sent-username ***************@du.ae password 0 *****************
ppp ipcp route default
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
disable-eadi
!
dialer-list 1 protocol ip permit
!
control-plane
!
line con 0
line aux 0
line vty 0 4
login
transport input all
!
scheduler allocate 20000 1000

[Melvinb1981]

Still no joy

Router>enable

Router#show ip int brief

Interface                  IP-Address      OK? Method Status                Protocol

FastEthernet0/0            unassigned      YES NVRAM  up                    up

FastEthernet0/1            unassigned      YES NVRAM  administratively down down

Dialer1                    x.x.x.x      YES NVRAM  up                    up

Virtual-Access1            unassigned      YES unset  up                    up

Router#show running-config

Building configuration...

Current configuration : 1324 bytes

!

! No configuration change since last restart

version 15.1

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname Router

!

boot-start-marker

boot-end-marker

!

!

!

no aaa new-model

!

dot11 syslog

ip source-route

!

!

!

!

!

ip cef

no ipv6 cef

!

multilink bundle-name authenticated

!

crypto pki token default removal timeout 0

!

!

!

!

license udi pid CISCO1841 sn FCZ094020LM

!

redundancy

!

!

controller T1 0/0/0

!

controller T1 0/0/1

!

!

!

!

!

!

!

!

interface FastEthernet0/0

 no ip address

 duplex auto

 speed auto

 pppoe enable group global

 pppoe-client dial-pool-number 10

!

interface FastEthernet0/1

 no ip address

 shutdown

 duplex auto

 speed auto

!

interface Dialer1

 ip address x.x.x.x 255.255.254.0

 ip virtual-reassembly in

 encapsulation ppp

 dialer pool 10

 dialer-group 1

 ppp authentication pap callin

 ppp chap hostname xxxxxxxxxxx@du.ae

 ppp chap password 0 xxxxxxxxxxxxxxxxxxx

 ppp pap sent-username xxxxxxxxxxxxx@du.ae password 0 xxxxxxxxxxxx

 ppp ipcp route default

!

ip forward-protocol nd

no ip http server

no ip http secure-server

!

!

!

dialer-list 1 protocol ip permit

disable-eadi

!

!

!

!

!

!

control-plane

!

!

!

line con 0

line aux 0

line vty 0 4

 login

 transport input all

!

scheduler allocate 20000 1000

end

Router#

[Georg Pauwen]

Hello,

turn:

debug ppp negotiation

debug ppp authentication

on, shut/no shut the interface and post the output of the debugs...

[Melvinb1981]

No Display at all, 

Was thinking something at the physical layer but i doubt it as the cables tested and working with the ISP router

Link light comes on the 1841

PPP authentication debugging is on
Router#debug ppp nego
Router#debug ppp negotiation
PPP protocol negotiation debugging is on
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#int fas
Router(config)#int fastEthernet 0/0
Router(config-if)#shut
Router(config-if)#no s
Jan 2 13:49:59.531: %LINK-5-CHANGED: Interface FastEthernet0/0, changed state t o administratively down
Jan 2 13:50:00.531: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEtherne t0/0, changed state to down
Router(config-if)#no shut
Router(config-if)#
Jan 2 13:50:05.315: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Jan 2 13:50:06.315: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEtherne t0/0, changed state to up
Router(config-if)#
Jan 2 13:50:31.763: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEtherne t0/0, changed state to down
Router(config-if)#

[Georg Pauwen]

Hello,

what type/model is the ISP modem ? There must be a physical difference, since on your 1841, there is no exchange of any (PPP) packets at all...

[Melvinb1981]

So the Du (ISP provider) piggy backs off the Etisalat( ISP - White Box) assume they have some agreement on sharing the lines 

I am wanting to plug directly from the Etisalat Box to the Cisco. I cloned the mac address of the Box Below and applied it to the cisco Router. 

[Georg Pauwen]

Hello,

I don't understand your physical setup. A shared line ? If there is more than one party in the building that uses the ISP uplink, I am pretty sure they have built in some sort of security (beyond the MAC address) to ensure that only their own (compatible) routers can be connected. I would check with the ISP and ask them if what you want to do is possible at all...

[paul driver]

hello

First post you stated this

---

@Melvinb1981 wrote:

Interface                  IP-Address      OK? Method Status                Protocol

FastEthernet0/0            unassigned      YES NVRAM  up                    up

Then this

---

@Melvinb1981 wrote:

Router(config-if)#no shut
Router(config-if)#
Jan 2 13:50:05.315: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
Jan 2 13:50:06.315: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEtherne t0/0, changed state to up
Router(config-if)#
Jan 2 13:50:31.763: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEtherne t0/0, changed state to down
Router(config-if)#

---

---

So at present the status is you have line protocol down correct?
If so and as this is a cisco box and not the isp's own box, are you sure you dont need a cross-over cable or hardcoded speed/duplex settings? -  has this been tested?

[Melvinb1981]

I have picked up an issue like this before where i have hard coded the
device and it does not work unless physically changing out the cable to
crossover im not certain why this is happening maybe you would best know.
Ill check software revisions and see if there any known bugs with this
version

[Melvinb1981]

Router#show
Jan 2 12:07:52.775: %SYS-5-CONFIG_I: Configured from console by consolepppoe session
1 client session

Uniq ID PPPoE RemMAC Port VT VA State
SID LocMAC VA-st Type
N/A 0 0000.0000.0000 Fa0/0 Di1 N/A PADISNT
0000.0000.0000

this might be on the isp side 

[paul driver]

Cabling or speed/duplex mismatch 

Test both