Cisco router 800 series router FE WAN port not working

[Antonnifo]

I have a Cisco 800 series router that was previously configured to work with an ISP router in bridge mode. Unfortunately, the person who configured it forgot the password. Following this video tutorial (https://youtu.be/YRGfiHIJ860), I was able to reset the password. However, after the reset, I noticed that the Cisco router is not functioning when connected to the FE WAN port from the ISP router. I'm concerned that I may have unintentionally erased the previous configurations during the reset. If that's not the case, what else could be causing this issue? Any assistance would be greatly appreciated. Thank you

[balaji.bandi · Accepted solution]

Can you post show run (from the device )

what is the status you see when you issue show interface fas x/x (have you tried changing the cables ?)

by default some ports are in shutdown mode - you need to no shutdown to bring up the interface.

[Antonnifo]

Show run gives the following output:

Building configuration...

Current configuration : 3459 bytes
!
! No configuration change since last restart
version 15.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname zisco
!
boot-start-marker
boot-end-marker
!
!
enable secret xxx
!
no aaa new-model
memory-size iomem 10
clock timezone EAT 3 0
crypto pki token default removal timeout 0
!
!
no ip source-route
!
!
!
!
!
ip domain name zisco.local
ip name-server 8.8.8.8
ip name-server 1.1.1.1
ip cef
login block-for 120 attempts 5 within 60
login quiet-mode access-class 101
login on-failure log
login on-success log
ipv6 unicast-routing
ipv6 cef
!
!
license udi pid CISCO881-K9 sn xxx
license accept end user agreement
license boot module c880-data level advsecurity
!
!
username router privilege 15 password xxx
!
!
!
!
!
ip ssh version 2
!
!
!
!
!
!
!
!
!
interface FastEthernet0
 no ip address
!
interface FastEthernet1
 no ip address
!
interface FastEthernet2
 no ip address
!
interface FastEthernet3
 no ip address
!
interface FastEthernet4
 description DSL interface
 no ip address
 load-interval 30
 shutdown
 duplex auto
 speed auto
 pppoe enable group global
 pppoe-client dial-pool-number 1
!
interface Vlan1
 description CORPORATE LAN
 ip address 192.168.123.254 255.255.255.0
 no ip unreachables
 no ip proxy-arp
 ip nat inside
 ip virtual-reassembly in
 ip tcp adjust-mss 1452
 ipv6 enable
!
interface Dialer1
 ip address negotiated
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 ip mtu 1492
 ip nat outside
 ip virtual-reassembly in
 encapsulation ppp
 ip tcp adjust-mss 1452
 dialer pool 1
 ppp authentication chap pap callin
 ppp chap hostname xxx
 ppp chap password xxx
 ppp pap sent-username xxx password xxx
 no cdp enable
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
ip nat inside source list 102 interface Dialer1 overload
ip route 0.0.0.0 0.0.0.0 Dialer1
!
!
access-list 101 permit ip 192.168.123.0 0.0.0.255 any
access-list 102 permit ip 192.168.123.0 0.0.0.255 any

 The

show interface

command gives the following output.

Dialer1 is up (spoofing), line protocol is up (spoofing)
  Hardware is Unknown
  Internet address will be negotiated using IPCP
  MTU 1500 bytes, BW 56 Kbit/sec, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation PPP, LCP Closed, loopback not set
  Keepalive set (10 sec)
  DTR is pulsed for 1 seconds on reset
  Last input never, output never, output hang never
  Last clearing of "show interface" counters 00:28:03
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes
     0 packets output, 0 bytes
FastEthernet0 is down, line protocol is down
  Hardware is Fast Ethernet, address is 2894.0f74.b28e (bia 2894.0f74.b28e)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Auto-duplex, Auto-speed
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 2 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
FastEthernet1 is down, line protocol is down
  Hardware is Fast Ethernet, address is 2894.0f74.b28f (bia 2894.0f74.b28f)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Auto-duplex, Auto-speed
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 2 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
FastEthernet2 is down, line protocol is down
  Hardware is Fast Ethernet, address is 2894.0f74.b290 (bia 2894.0f74.b290)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Auto-duplex, Auto-speed
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 2 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
FastEthernet3 is down, line protocol is down
  Hardware is Fast Ethernet, address is 2894.0f74.b291 (bia 2894.0f74.b291)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Auto-duplex, Auto-speed
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 2 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
FastEthernet4 is administratively down, line protocol is down
  Hardware is PQII_PRO_UEC, address is 2894.0f74.b292 (bia 2894.0f74.b292)
  Description: DSL interface
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Auto-duplex, Auto Speed, 100BaseTX/FX
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:28:11, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  30 second input rate 0 bits/sec, 0 packets/sec
  30 second output rate 0 bits/sec, 0 packets/sec
     46 packets input, 4281 bytes
     Received 46 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog
     0 input packets with dribble condition detected
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out
NVI0 is administratively down, line protocol is down
  Hardware is NVI
  MTU 1514 bytes, BW 56 Kbit/sec, DLY 5000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation UNKNOWN, loopback not set
  Keepalive set (10 sec)
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out
Virtual-Access1 is up, line protocol is up
  Hardware is Virtual Access interface
  MTU 1492 bytes, BW 100000 Kbit/sec, DLY 100000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation PPP, LCP Closed
  Base PPPoE vaccess
  Vaccess status 0x44, loopback not set
  Keepalive set (10 sec)
  DTR is pulsed for 5 seconds on reset
  Last input never, output never, output hang never
  Last clearing of "show interface" counters 00:28:03
  Input queue: 0/4096/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions
Vlan1 is down, line protocol is down
  Hardware is EtherSVI, address is 2894.0f74.b28e (bia 2894.0f74.b28e)
  Description: CORPORATE LAN
  Internet address is 192.168.123.254/24
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive not supported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts (0 IP multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 1 interface resets
     0 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out

I have used different cables also, kindly explain further on the

no shutdown

command

Building configuration...

Current configuration : 3459 bytes
!
! No configuration change since last restart
version 15.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname zisco
!
boot-start-marker
boot-end-marker
!
!
enable secret xxx
!
no aaa new-model
memory-size iomem 10
clock timezone EAT 3 0
crypto pki token default removal timeout 0
!
!
no ip source-route
!
!
!
!
!
ip domain name zisco.local
ip name-server 8.8.8.8
ip name-server 1.1.1.1
ip cef
login block-for 120 attempts 5 within 60
login quiet-mode access-class 101
login on-failure log
login on-success log
ipv6 unicast-routing
ipv6 cef
!
!
license udi pid CISCO881-K9 sn xxx
license accept end user agreement
license boot module c880-data level advsecurity
!
!
username router privilege 15 password xxx
!
!
!
!
!
ip ssh version 2
!
!
!
!
!
!
!
!
!
interface FastEthernet0
 no ip address
!
interface FastEthernet1
 no ip address
!
interface FastEthernet2
 no ip address
!
interface FastEthernet3
 no ip address
!
interface FastEthernet4
 description DSL interface
 no ip address
 load-interval 30
 shutdown
 duplex auto
 speed auto
 pppoe enable group global
 pppoe-client dial-pool-number 1
!
interface Vlan1
 description CORPORATE LAN
 ip address 192.168.123.254 255.255.255.0
 no ip unreachables
 no ip proxy-arp
 ip nat inside
 ip virtual-reassembly in
 ip tcp adjust-mss 1452
 ipv6 enable
!
interface Dialer1
 ip address negotiated
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 ip mtu 1492
 ip nat outside
 ip virtual-reassembly in
 encapsulation ppp
 ip tcp adjust-mss 1452
 dialer pool 1
 ppp authentication chap pap callin
 ppp chap hostname xxx
 ppp chap password xxx
 ppp pap sent-username xxx password xxx
 no cdp enable
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
ip nat inside source list 102 interface Dialer1 overload
ip route 0.0.0.0 0.0.0.0 Dialer1
!
!
access-list 101 permit ip 192.168.123.0 0.0.0.255 any
access-list 102 permit ip 192.168.123.0 0.0.0.255 any

[balaji.bandi]

as @Rich R pointed out, as i mentioned original post the interface in shutdown mode, so no shutdown to work as expected.

[marce1000]

 - You will probably need to review some current settings to check if the current configuration is still valid  ; checkout 
               https://www.cisco.com/c/en/us/td/docs/routers/access/800/software/configuration/guide/SCG800Guide/SCG800_Guide_BookMap_chapter_010.html
  https://www.cisco.com/c/en/us/td/docs/routers/access/800/software/configuration/guide/SCG800Guide/SCG800_Guide_BookMap_chapter_010.html#con_1130490
  https://www.cisco.com/c/en/us/td/docs/routers/access/800/software/configuration/guide/SCG800Guide/SCG800_Guide_BookMap_chapter_010.html#task_1224393

 M.

[Richard Burts]

I did not watch that video. But pretty much all of the password recovery processes boot the device bypassing the startup config to gain entry. Is it possible that your router still has the config register set to bypass the startup? When you log in to the router what do you get when you use the command

show start

Also do

show version

and look down at the bottom and tell us what it has for config register.

[Rich R · Accepted solution]

interface FastEthernet4
description DSL interface
no ip address
load-interval 30
shutdown
duplex auto
speed auto
pppoe enable group global
pppoe-client dial-pool-number 1

So:
conf t
interface FastEthernet4
no shutdown
end
wr