04-15-2011 01:03 AM - edited 03-04-2019 12:04 PM
Good day!
I have some problems with establishing pppoe connection from Cisco to ISP. Please could you help me!
show ver
Cisco IOS Software, C880 Software (C880DATA-UNIVERSALK9_NPE-M), Version 15.1(1)T1, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Mon 19-Jul-10 07:17 by prod_rel_team
ROM: System Bootstrap, Version 12.4(22r)YB5, RELEASE SOFTWARE (fc1)
cisco_vlc uptime is 23 hours, 58 minutes
System returned to ROM by power-on
System image file is "flash:c880data-universalk9_npe-mz.151-1.T1.bin"
Last reload type: Normal Reload
show run (partial)
version 15.1
no aaa new-model
clock timezone Moscow 3
ip source-route
!
ip cef
no ip domain lookup
ip domain name vlc.local
ip name-server -----------ISP DNS--------
ip name-server -----------ISP DNS--------
no ipv6 cef
!
!
vpdn enable
!
bba-group pppoe global
!
interface FastEthernet0
!
interface FastEthernet1
!
interface FastEthernet2
!
interface FastEthernet3
!
interface FastEthernet4
no ip address
duplex auto
speed auto
pppoe-client dial-pool-number 1
interface Vlan1
description $ETH-SW-LAUNCH$$INTF-INFO-HWIC 4ESW$
ip address 192.168.10.1 255.255.255.0
ip nat inside
ip virtual-reassembly
ip tcp adjust-mss 1452
!
interface Dialer1
ip address negotiated
ip mtu 1492
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer pool 1
dialer-group 1
ppp authentication chap callin
ppp chap hostname lizing
ppp chap password 0 PASSWORD
ppp ipcp route default
no cdp enable
!
ip forward-protocol nd
ip nat inside source list NAT interface Dialer1 overload
ip route 0.0.0.0 0.0.0.0 Dialer1
!
ip access-list extended NAT
permit ip host 192.168.10.254 any
!
dialer-list 1 protocol ip permit
I trying to debug:
sh debug
PPP:
PPP authentication debugging is on
PPP protocol errors debugging is on
PPP protocol negotiation debugging is on
PPPoE:
PPPoE protocol events debugging is on
PPPoE control packets debugging is on
Solved! Go to Solution.
04-15-2011 09:55 AM
Sorry, just noticed you are running 15.1(1)T1.
I would recommend upgrading it to 15.1(1)T2 or latest 15.1(3)T1. There is a bug on these boxes running 15.1(1)T1 on which we get a "Vi1 PPP DISC: Lower Layer disconnected" message, it is related to some garbage being sent out.
04-15-2011 01:55 AM
Hi Mikhail,
04-15-2011 04:38 AM
Marco Vespignani, thank you for your answer.
New config looks like this:
vpdn enable
bba-group pppoe global
!
interface FastEthernet4
no ip address
duplex auto
speed auto
pppoe-client dial-pool-number 1
!
interface Vlan1
description $ETH-SW-LAUNCH$$INTF-INFO-HWIC 4ESW$
ip address 192.168.10.1 255.255.255.0
ip nat inside
ip virtual-reassembly
ip tcp adjust-mss 1452
!
interface Dialer1
mtu 1492
ip address negotiated
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer pool 1
dialer-group 1
ppp authentication chap callin
ppp chap hostname lizing
ppp chap password 0 PASSWORD
ppp ipcp route default
no cdp enable
04-15-2011 06:05 AM
Hello Mikhail,
Please try by adding "ppp authentication chap callin" then collect same debugs. Are you sure you should be using CHAP? Why don't you try using both PAP and CHAP at the same time.
I hope this helps!
04-15-2011 08:32 AM
ISP said, that only CHAP authentication should be used. As i know, using CHAP and PAP all together - is not correct configugation. Сorrect me if I'm wrong.
"ppp authentication chap callin" i already use
04-15-2011 09:44 AM
Mikhail,
You can have both PAP and CHAP configured under Dialer interface, that should not be a problem. IOS and router will know what to use based on the I CONFREQ messages received from DSL Agg device, based on that CPE will know what to use.
I agree with Marco, issue is due to a lower layer problem, see below:
Vi1 PPP DISC: Lower Layer disconnected
What is the IOS you are running on this device?
04-15-2011 09:55 AM
Sorry, just noticed you are running 15.1(1)T1.
I would recommend upgrading it to 15.1(1)T2 or latest 15.1(3)T1. There is a bug on these boxes running 15.1(1)T1 on which we get a "Vi1 PPP DISC: Lower Layer disconnected" message, it is related to some garbage being sent out.
04-21-2011 03:39 AM
Marco Vespignani, Juan Perez - thank you for your help!
Problem solved via changing IOS to c880data-universalk9_npe-mz.151-4.M.bin
No working config looks like this:
no aaa new-model
memory-size iomem 10
ip source-route
!
no ipv6 cef
!
!
vpdn enable
!
!
interface FastEthernet0
no ip address
no cdp enable
!
interface FastEthernet1
no ip address
no cdp enable
!
interface FastEthernet2
no ip address
no cdp enable
!
interface FastEthernet3
no ip address
no cdp enable
!
interface FastEthernet4
no ip address
duplex auto
speed auto
pppoe-client dial-pool-number 1
no cdp enable
!
interface Vlan1
description "LAN"
ip address 192.168.10.1 255.255.255.0
ip nat inside
ip virtual-reassembly in
!
interface Dialer1
mtu 1452
ip address negotiated
ip nat outside
ip virtual-reassembly in
encapsulation ppp
load-interval 30
dialer pool 1
dialer-group 1
ppp authentication chap callin
ppp chap hostname LOGIN
ppp chap password 0 PASSWORD
ppp pap sent-username LOGIN password 0 PASSWORD
ppp ipcp dns accept
ppp ipcp route default
no cdp enable
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
ip nat inside source list NAT interface Dialer1 overload
!
ip access-list extended NAT
permit ip host 192.168.10.254 any
!
logging esm config
dialer-list 1 protocol ip permit
no cdp run
!
cisco#sh ver
Cisco IOS Software, C880 Software (C880DATA-UNIVERSALK9_NPE-M), Version 15.1(4)M, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Thu 24-Mar-11 20:33 by prod_rel_team
ROM: System Bootstrap, Version 12.4(22r)YB5, RELEASE SOFTWARE (fc1)
cisco_vlc uptime is 59 minutes
System returned to ROM by power-on
System image file is "flash:c880data-universalk9_npe-mz.151-4.M.bin"
Last reload type: Normal Reload
04-15-2011 09:19 AM
Hi, 2 interesting things in the debugs:
Now we agree on MTU 1492, good.
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide