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Line protocol is down (disabled) on serial interface, Packet tracer

h19simno
Level 1
Level 1

Me and my friend are trying to use a ppp authentication for a school lab but the interface is always disabled and we've tried checking every problem we can think of. Please help if you can find the issue we can't.

We are using a DCE cable with the clock rate side facing R1. We are using a ipsec vpn tunnel through these ports as well.

 

R1:

R1#show interfaces serial 0/2/1

Serial0/2/1 is up, line protocol is down (disabled)

Hardware is HD64570

Internet address is 50.0.0.1/24

MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation PPP, loopback not set, keepalive set (10 sec)

LCP Closed

Closed: LEXCP, BRIDGECP, IPCP, CCP, CDPCP, LLC2, BACP

Last input never, output never, output hang never

Last clearing of "show interface" counters never

Input queue: 0/75/0 (size/max/drops); Total output drops: 0

Queueing strategy: weighted fair

Output queue: 0/1000/64/0 (size/max total/threshold/drops)

Conversations 0/0/256 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

Available Bandwidth 1158 kilobits/sec

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 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

 

R4:

R4#show interfaces serial 0/3/1

Serial0/3/1 is up, line protocol is down (disabled)

Hardware is HD64570

Internet address is 50.0.0.2/24

MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation PPP, loopback not set, keepalive set (10 sec)

LCP Closed

Closed: LEXCP, BRIDGECP, IPCP, CCP, CDPCP, LLC2, BACP

Last input never, output never, output hang never

Last clearing of "show interface" counters never

Input queue: 0/75/0 (size/max/drops); Total output drops: 0

Queueing strategy: weighted fair

Output queue: 0/1000/64/0 (size/max total/threshold/drops)

Conversations 0/0/256 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

Available Bandwidth 1158 kilobits/sec

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 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, 2 interface resets

0 output buffer failures, 0 output buffers swapped out

0 carrier transitions

DCD=up DSR=up DTR=up RTS=up CTS=up

 

R1: 

R1#show run

Building configuration...

 

Current configuration : 2772 bytes

!

version 15.1

service timestamps log datetime msec

no service timestamps debug datetime msec

service password-encryption

security passwords min-length 10

!

hostname R1

!

!

!

enable secret 5 $1$mERr$HYKh40On65szbkJKMF7Qn.

!

!

!

!

!

!

no ip cef

no ipv6 cef

!

!

!

username admin secret 5 $1$mERr$Q0NriKRSL5J0jgg7JKcOx/

!

!

license udi pid CISCO2911/K9 sn FTX15244DTY-

license boot module c2900 technology-package securityk9

!

!

!

crypto isakmp policy 10

encr aes 256

authentication pre-share

group 5

!

crypto isakmp key 7W7QhDRhwdkzPT83 address 50.0.0.2

!

!

!

crypto ipsec transform-set HQ-BO esp-aes 256 esp-sha-hmac

!

crypto map IPSEC-MAP 10 ipsec-isakmp

set peer 50.0.0.2

set pfs group5

set security-association lifetime seconds 86400

set transform-set HQ-BO

match address 150

!

!

!

!

no ip domain-lookup

ip domain-name aurora.com

!

!

spanning-tree mode pvst

!

!

!

!

!

!

interface GigabitEthernet0/0

ip address 40.0.0.1 255.255.255.0

ip ospf authentication message-digest

ip ospf message-digest-key 1 md5 aurora2022

duplex auto

speed auto

!

interface GigabitEthernet0/1

ip address 30.0.0.2 255.255.255.0

ip ospf authentication message-digest

ip ospf message-digest-key 1 md5 aurora2022

duplex auto

speed auto

!

interface GigabitEthernet0/2

no ip address

duplex auto

speed auto

!

interface Serial0/2/0

no ip address

clock rate 2000000

shutdown

!

interface Serial0/2/1

ip address 50.0.0.1 255.255.255.0

encapsulation ppp

ppp authentication chap

clock rate 2000000

!

interface Vlan1

no ip address

shutdown

!

router ospf 100

log-adjacency-changes

area 0 authentication message-digest

network 30.0.0.0 0.0.0.0 area 10

network 40.0.0.0 0.0.0.0 area 10

network 40.0.0.0 0.0.0.255 area 10

network 30.0.0.0 0.0.0.255 area 10

network 50.0.0.0 0.0.0.255 area 10

!

ip classless

ip route 172.16.40.0 255.255.255.0 50.0.0.2

ip route 172.16.20.0 255.255.255.0 50.0.0.2

ip route 172.16.51.0 255.255.255.0 50.0.0.2

!

ip flow-export version 9

!

!

access-list 150 permit ip 10.0.0.0 0.0.0.255 192.168.40.0 0.0.0.255

access-list 150 permit ip 20.0.0.0 0.0.0.255 192.168.40.0 0.0.0.255

access-list 150 permit ip 10.0.0.0 0.0.0.255 192.168.20.0 0.0.0.255

access-list 150 permit ip 20.0.0.0 0.0.0.255 192.168.20.0 0.0.0.255

access-list 150 permit ip 192.168.40.0 0.0.0.255 20.0.0.0 0.0.0.255

access-list 150 permit ip 192.168.20.0 0.0.0.255 10.0.0.0 0.0.0.255

access-list 150 permit ip 192.168.20.0 0.0.0.255 20.0.0.0 0.0.0.255

access-list 150 permit ip 192.168.40.0 0.0.0.255 10.0.0.0 0.0.0.255

!

banner motd ^CUnauthorized access is prohibited^C

!

!

!

!

!

logging 20.0.0.12

line con 0

password 7 08324543061706181C1B0D1739

login

!

line aux 0

!

line vty 0 4

login local

transport input ssh

line vty 5 15

login local

transport input ssh

!

!

!

end

 

R4:

R4#show run

Building configuration...

 

Current configuration : 3336 bytes

!

version 15.1

no service timestamps log datetime msec

no service timestamps debug datetime msec

service password-encryption

security passwords min-length 10

!

hostname R4

!

!

!

enable secret 5 $1$mERr$HYKh40On65szbkJKMF7Qn.

!

!

ip dhcp excluded-address 172.16.20.1 172.16.20.10

ip dhcp excluded-address 172.16.40.1 172.16.40.10

ip dhcp excluded-address 172.16.51.1 172.16.51.10

!

ip dhcp pool vPool20

network 172.16.20.0 255.255.255.0

default-router 172.16.20.1

ip dhcp pool vPool40

network 172.16.40.0 255.255.255.0

default-router 172.16.40.1

ip dhcp pool vPool51

network 172.16.51.0 255.255.255.0

default-router 172.16.51.1

!

!

!

no ip cef

no ipv6 cef

!

!

!

username admin secret 5 $1$mERr$Q0NriKRSL5J0jgg7JKcOx/

!

!

license udi pid CISCO2911/K9 sn FTX15245ZKN-

license boot module c2900 technology-package securityk9

!

!

!

crypto isakmp policy 10

encr aes 256

authentication pre-share

group 5

!

crypto isakmp key 7W7QhDRhwdkzPT83 address 50.0.0.1

!

!

!

crypto ipsec transform-set BO-HQ esp-aes 256 esp-sha-hmac

!

crypto map IPSEC-MAP 10 ipsec-isakmp

set peer 50.0.0.1

set pfs group5

set security-association lifetime seconds 86400

set transform-set BO-HQ

match address 150

!

!

!

!

no ip domain-lookup

!

!

spanning-tree mode pvst

!

!

!

!

!

!

interface GigabitEthernet0/0

no ip address

duplex auto

speed auto

!

interface GigabitEthernet0/1

no ip address

duplex auto

speed auto

!

interface GigabitEthernet0/1.20

description HR

encapsulation dot1Q 20

ip address 172.16.20.1 255.255.255.0

!

interface GigabitEthernet0/1.40

description Forsaljning

encapsulation dot1Q 40

ip address 172.16.40.1 255.255.255.0

!

interface GigabitEthernet0/1.51

description Guests

encapsulation dot1Q 51

ip address 172.16.51.1 255.255.255.0

!

interface GigabitEthernet0/2

no ip address

duplex auto

speed auto

shutdown

!

interface Serial0/3/0

no ip address

clock rate 2000000

shutdown

!

interface Serial0/3/1

ip address 50.0.0.2 255.255.255.0

encapsulation ppp

ppp authentication chap

!

interface Vlan1

no ip address

shutdown

!

router ospf 1

log-adjacency-changes

area 0 authentication message-digest

network 172.16.20.0 0.0.0.255 area 10

network 172.16.40.0 0.0.0.255 area 10

network 172.16.51.0 0.0.0.255 area 10

network 50.0.0.0 0.0.0.255 area 10

!

ip classless

ip route 192.168.40.0 255.255.255.0 172.16.40.11

ip route 10.0.0.0 255.255.255.0 50.0.0.1

ip route 20.0.0.0 255.255.255.0 50.0.0.1

ip route 30.0.0.0 255.255.255.0 50.0.0.1

ip route 40.0.0.0 255.255.255.0 50.0.0.1

!

ip flow-export version 9

!

!

access-list 150 permit ip 10.0.0.0 0.0.0.255 192.168.40.0 0.0.0.255

access-list 150 permit ip 20.0.0.0 0.0.0.255 192.168.40.0 0.0.0.255

access-list 150 permit ip 10.0.0.0 0.0.0.255 192.168.20.0 0.0.0.255

access-list 150 permit ip 20.0.0.0 0.0.0.255 192.168.20.0 0.0.0.255

access-list 150 permit ip 192.168.40.0 0.0.0.255 10.0.0.0 0.0.0.255

access-list 150 permit ip 192.168.40.0 0.0.0.255 20.0.0.0 0.0.0.255

access-list 150 permit ip 192.168.20.0 0.0.0.255 10.0.0.0 0.0.0.255

access-list 150 permit ip 192.168.20.0 0.0.0.255 20.0.0.0 0.0.0.255

!

no cdp run

!

banner motd ^CUnauthorized access is prohibited!^C

!

!

!

!

!

line con 0

password 7 08324543061706181C1B0D1739

login

!

line aux 0

!

line vty 0 4

login local

transport input ssh

line vty 5 15

login local

transport input ssh

!

!

!

end

1 Accepted Solution

Accepted Solutions

The problem was related to authentication.

You created the username "admin" but the username must be the router hostname.

Attaching the working topology.

View solution in original post

4 Replies 4

Attach the .pkt file here. Zip it first. 

here you go.

con password is: simonconpass

en password is: simonenpass

The problem was related to authentication.

You created the username "admin" but the username must be the router hostname.

Attaching the working topology.

Thank you so much!