LCP ConfACK packets lost on PPPoE over ADSL/VDSL int

Created: Sep 28, 2016 06:54:28Latest reply: Nov 23, 2016 04:35:26 2371 5 0 0

Have a router AR169FGW-L, It was  V200R005C32SPC200, then updated to  AR160F-V200R007C00SPC900 + AR160F-V200R007SPH005 (with the same result)

ADSL config:
-----------

set workmode slot 0 VDSL atm
!
interface Atm0/0/0
pvc 0/110
  map bridge Virtual-Ethernet0/0/0
!
interface Virtual-Ethernet0/0/0
interface Virtual-Ethernet0/0/0.10
  pppoe-client dial-bundle-number 1
  dot1q termination vid 10
!
interface Dialer1                        
link-protocol ppp
ppp chap user test
ppp chap password cipher %^%#^e!1TA7!,L$>xbGY:/A-\qlO='/z',ChzZA"ly"8%^%#
ppp pap local-user test password cipher %^%#VT|!>7mL1L,,!0TNkws9,*WZ:m/g,V-W%b!0@iRG%^%#
ppp ipcp dns admit-any
ppp ipcp dns request
tcp adjust-mss 1200
ip address ppp-negotiate
dialer user arweb
dialer bundle 1
dialer-group 1
!
dialer-rule
dialer-rule 1 ip permit
!
ip route-static 0.0.0.0 0.0.0.0 Dialer1

------------


Adsl interface connectd and PPPoE session is done, but stuck on PPP LCP negotiation, ISP send LCP ConfReq, Huawei replied "ConfAck" but ISP dont see these packets.

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Alex_LAN     Created Sep 29, 2016 08:07:13 Helpful(0) Helpful(0)

LCP ConfACK packets lost on PPPoE over ADSL/VDSL int

Just for test, added a statc IP 2.2.2.2 onto Virt interface and 2.2.2.1 on Ithe SP side, then unsuccessfully tried to ping 2.2.2.1. 

So, I can see arp packets coming from ISP side on the Huawei router, replies,  but nothing except PPPoE packets on the ISP side. 

interface Virtual-Ethernet0/0/0.10
pppoe-client dial-bundle-number 2
dot1q termination vid 10
ip address  2.2.2.2 255.255.255.252
-----

Sep 28 2016 13:00:04.430.1-11:00 DST itttrart01 ARP/7/arp_rcv:Receive an ARP Packet, operation : 1, sender_eth_addr : e840-4011-9440, sender_ip_addr : 2.2.2.1, target_eth_addr : 0000-0000-0000, target_ip_addr : 2.2.2.2

Sep 28 2016 13:00:04.430.2-11:00 DST itttrart01 ARP/7/arp_send:Send an ARP Packet, operation : 2, sender_eth_addr : 30f3-3572-1dca,sender_ip_addr : 2.2.2.2, target_eth_addr : e840-4011-9440, target_ip_addr : 2.2.2.1

--------




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Alex_LAN     Created Sep 28, 2016 06:55:19 Helpful(0) Helpful(0)

LCP ConfACK packets lost on PPPoE over ADSL/VDSL int

PPP LCP Debug

Sep 27 2016 09:15:11.879.2-11:00 DST itttrart01 PPP/7/debug2:
  PPP Event:
      Dialer4:0 LCP Open  Event
      state initial
Sep 27 2016 09:15:11.879.3-11:00 DST itttrart01 PPP/7/debug2:
  PPP State Change:
      Dialer4:0 LCP : initial --> starting
Sep 27 2016 09:15:11.879.4-11:00 DST itttrart01 PPP/7/debug2:
  PPP Event:
      Dialer4:0 LCP Lower Up  Event
      state starting
Sep 27 2016 09:15:11.879.5-11:00 DST itttrart01 PPP/7/debug2:
  PPP State Change:
      Dialer4:0 LCP : starting --> reqsent
Sep 27 2016 09:15:11.879.6-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Output LCP(c021) Pkt, Len 18
      State reqsent, code ConfReq(01), id 1, len 14
      MRU(1), len 4, val 05dc 
      MagicNumber(5), len 6, val 71711ed0 
Sep 27 2016 09:15:13.979.1-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Input  LCP(c021) Pkt, Len 18
      State reqsent, code ConfReq(01), id 1, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 
Sep 27 2016 09:15:13.979.2-11:00 DST itttrart01 PPP/7/debug2:
  PPP Event:
      Dialer4:0 LCP RCR+(Receive Config Good Request)  Event
      state reqsent
Sep 27 2016 09:15:13.979.3-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Output LCP(c021) Pkt, Len 18
      State reqsent, code ConfAck(02), id 1, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 
Sep 27 2016 09:15:13.979.4-11:00 DST itttrart01 PPP/7/debug2:
  PPP State Change:
      Dialer4:0 LCP : reqsent --> acksent
Sep 27 2016 09:15:15.869.1-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Input  LCP(c021) Pkt, Len 18
      State acksent, code ConfReq(01), id 2, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 
Sep 27 2016 09:15:15.869.2-11:00 DST itttrart01 PPP/7/debug2:
  PPP Event:
      Dialer4:0 LCP RCR+(Receive Config Good Request)  Event
      state acksent
Sep 27 2016 09:15:15.869.3-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Output LCP(c021) Pkt, Len 18
      State acksent, code ConfAck(02), id 2, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 
Sep 27 2016 09:15:17.889.1-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Input  LCP(c021) Pkt, Len 18
      State acksent, code ConfReq(01), id 3, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 
Sep 27 2016 09:15:17.889.2-11:00 DST itttrart01 PPP/7/debug2:
  PPP Event:
      Dialer4:0 LCP RCR+(Receive Config Good Request)  Event
      state acksent
Sep 27 2016 09:15:17.889.3-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Output LCP(c021) Pkt, Len 18
      State acksent, code ConfAck(02), id 3, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 

Sep 27 2016 09:15:19.899.1-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Input  LCP(c021) Pkt, Len 18
      State acksent, code ConfReq(01), id 4, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 
Sep 27 2016 09:15:19.899.2-11:00 DST itttrart01 PPP/7/debug2:
  PPP Event:
      Dialer4:0 LCP RCR+(Receive Config Good Request)  Event
      state acksent
Sep 27 2016 09:15:19.899.3-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Output LCP(c021) Pkt, Len 18
      State acksent, code ConfAck(02), id 4, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 
Sep 27 2016 09:15:21.839.1-11:00 DST itttrart01 PPP/7/debug2:
  PPP Event:
      Dialer4:0 LCP TO+(Timeout with counter > 0)  Event
      state acksent , Retransmit = 4
Sep 27 2016 09:15:21.839.2-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Output LCP(c021) Pkt, Len 18
      State acksent, code ConfReq(01), id 2, len 14
      MRU(1), len 4, val 05dc 
      MagicNumber(5), len 6, val e20aa8c6 
Sep 27 2016 09:15:21.919.1-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Input  LCP(c021) Pkt, Len 18
      State acksent, code ConfReq(01), id 5, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 
Sep 27 2016 09:15:21.919.2-11:00 DST itttrart01 PPP/7/debug2:
  PPP Event:
      Dialer4:0 LCP RCR+(Receive Config Good Request)  Event
      state acksent
Sep 27 2016 09:15:21.919.3-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Output LCP(c021) Pkt, Len 18
      State acksent, code ConfAck(02), id 5, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 

Sep 27 2016 09:15:23.929.1-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Input  LCP(c021) Pkt, Len 18
      State acksent, code ConfReq(01), id 6, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 
Sep 27 2016 09:15:23.929.2-11:00 DST itttrart01 PPP/7/debug2:
  PPP Event:
      Dialer4:0 LCP RCR+(Receive Config Good Request)  Event
      state acksent
Sep 27 2016 09:15:23.929.3-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Output LCP(c021) Pkt, Len 18
      State acksent, code ConfAck(02), id 6, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 
Sep 27 2016 09:15:25.949.1-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Input  LCP(c021) Pkt, Len 18
      State acksent, code ConfReq(01), id 7, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 

Sep 27 2016 09:15:25.949.2-11:00 DST itttrart01 PPP/7/debug2:
  PPP Event:
      Dialer4:0 LCP RCR+(Receive Config Good Request)  Event
      state acksent

Sep 27 2016 09:15:25.949.3-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Output LCP(c021) Pkt, Len 18
      State acksent, code ConfAck(02), id 7, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 

Sep 27 2016 09:15:27.969.1-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Input  LCP(c021) Pkt, Len 18
      State acksent, code ConfReq(01), id 8, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 

Sep 27 2016 09:15:27.969.2-11:00 DST itttrart01 PPP/7/debug2:
  PPP Event:
      Dialer4:0 LCP RCR+(Receive Config Good Request)  Event
      state acksent

Sep 27 2016 09:15:27.969.3-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Output LCP(c021) Pkt, Len 18
      State acksent, code ConfAck(02), id 8, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 

Sep 27 2016 09:15:29.979.1-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Input  LCP(c021) Pkt, Len 18
      State acksent, code ConfReq(01), id 9, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 

Sep 27 2016 09:15:29.979.2-11:00 DST itttrart01 PPP/7/debug2:
  PPP Event:
      Dialer4:0 LCP RCR+(Receive Config Good Request)  Event
      state acksent

Sep 27 2016 09:15:29.979.3-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Output LCP(c021) Pkt, Len 18
      State acksent, code ConfAck(02), id 9, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 

Sep 27 2016 09:15:31.829.1-11:00 DST itttrart01 PPP/7/debug2:
  PPP Event:
      Dialer4:0 LCP TO+(Timeout with counter > 0)  Event
      state acksent , Retransmit = 4

Sep 27 2016 09:15:31.829.2-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Output LCP(c021) Pkt, Len 18
      State acksent, code ConfReq(01), id 3, len 14
      MRU(1), len 4, val 05dc 
      MagicNumber(5), len 6, val 422b4ba6 

Sep 27 2016 09:15:31.999.1-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Input  LCP(c021) Pkt, Len 18
      State acksent, code ConfReq(01), id a, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 

Sep 27 2016 09:15:31.999.2-11:00 DST itttrart01 PPP/7/debug2:
  PPP Event:
      Dialer4:0 LCP RCR+(Receive Config Good Request)  Event
      state acksent

Sep 27 2016 09:15:31.999.3-11:00 DST itttrart01 PPP/7/debug2:
  PPP Packet:
      Dialer4:0 Output LCP(c021) Pkt, Len 18
      State acksent, code ConfAck(02), id a, len 14
      AuthProto(3), len 4, PAP c023 
      MagicNumber(5), len 6, val 1b18f33d 

Sep 27 2016 09:15:34.19.2-11:00 DST itttrart01 PPP/7/debug2:
  PPP Event:
      Dialer4:0 LCP Lower Down  Event
      state acksent

Sep 27 2016 09:15:34.19.3-11:00 DST itttrart01 PPP/7/debug2:
  PPP State Change:
      Dialer4:0 LCP : acksent --> starting

Sep 27 2016 09:15:34.19.4-11:00 DST itttrart01 PPP/7/debug2:
  PPP Event:
      Dialer4:0 LCP Close  Event
      state starting

Sep 27 2016 09:15:34.19.5-11:00 DST itttrart01 PPP/7/debug2:
  PPP State Change:
      Dialer4:0 LCP : starting --> initial

Sep 27 2016 09:15:49.759.2-11:00 DST itttrart01 PPP/7/debug2:
  PPP Event:
      Dialer4:0 LCP Open  Event
      state initial

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Alex_LAN     Created Sep 28, 2016 06:56:26 Helpful(0) Helpful(0)

LCP ConfACK packets lost on PPPoE over ADSL/VDSL int

Capturing packets from ISP side

10:54:41.725616 PPPoE  [ses 0x7867] LCP, Conf-Request (0x01), id 9, length 16
10:54:43.741672 PPPoE  [ses 0x7867] LCP, Conf-Request (0x01), id 10, length 16
10:54:45.757494 PPPoE PADT [ses 0x7867]
10:55:01.825388 PPPoE PADI [Vendor-Specific "......CH-DSLAM-09 atm 1/1/03/14:0.110..104839861-CH-DSLAM-09-1-003-14.....E...."] [Service-Name] [Host-Uniq 0x0004]
10:55:01.825687 PPPoE PADO [Vendor-Specific "......CH-DSLAM-09 atm 1/1/03/14:0.110..104839861-CH-DSLAM-09-1-003-14.....E...."] [Service-Name] [Host-Uniq 0x0004] [AC-Name "ttpchcrt04"] [AC-Cookie "} 10:55:01.835868 PPPoE PADR [Vendor-Specific "......CH-DSLAM-09 atm 1/1/03/14:0.110..104839861-CH-DSLAM-09-1-003-14.....E...."] [Service-Name] [Host-Uniq 0x0004] [AC-Name "ttpchcrt04"] [AC-Cookie "} 10:55:01.836992 PPPoE PADS [ses 0x7869] [Vendor-Specific "......CH-DSLAM-09 atm 1/1/03/14:0.110..104839861-CH-DSLAM-09-1-003-14.....E...."] [Service-Name] [Host-Uniq 0x0004] [AC-Name "ttpchcrt04"] [AC-Cookie "} 10:55:03.837112 PPPoE  [ses 0x7869] LCP, Conf-Request (0x01), id 1, length 16
10:55:05.853718 PPPoE  [ses 0x7869] LCP, Conf-Request (0x01), id 2, length 16
10:55:07.869427 PPPoE  [ses 0x7869] LCP, Conf-Request (0x01), id 3, length 16
10:55:09.884766 PPPoE  [ses 0x7869] LCP, Conf-Request (0x01), id 4, length 16
10:55:11.900754 PPPoE  [ses 0x7869] LCP, Conf-Request (0x01), id 5, length 16
10:55:13.917126 PPPoE  [ses 0x7869] LCP, Conf-Request (0x01), id 6, length 16
10:55:15.933677 PPPoE  [ses 0x7869] LCP, Conf-Request (0x01), id 7, length 16
10:55:17.949145 PPPoE  [ses 0x7869] LCP, Conf-Request (0x01), id 8, length 16
10:55:19.964860 PPPoE  [ses 0x7869] LCP, Conf-Request (0x01), id 9, length 16
10:55:21.981697 PPPoE  [ses 0x7869] LCP, Conf-Request (0x01), id 10, length 16
10:55:23.998606 PPPoE PADT [ses 0x7869]
10:55:39.907949 PPPoE PADI [Vendor-Specific "......CH-DSLAM-09 atm 1/1/03/14:0.110..104839861-CH-DSLAM-09-1-003-14.....E...."] [Service-Name] [Host-Uniq 0x0004]
10:55:39.908222 PPPoE PADO [Vendor-Specific "......CH-DSLAM-09 atm 1/1/03/14:0.110..104839861-CH-DSLAM-09-1-003-14.....E...."] [Service-Name] [Host-Uniq 0x0004] [AC-Name "ttpchcrt04"] [AC-Cookie "} 10:55:39.918195 PPPoE PADR [Vendor-Specific "......CH-DSLAM-09 atm 1/1/03/14:0.110..104839861-CH-DSLAM-09-1-003-14.....E...."] [Service-Name] [Host-Uniq 0x0004] [AC-Name "ttpchcrt04"] [AC-Cookie "} 10:55:39.919219 PPPoE PADS [ses 0x786b] [Vendor-Specific "......CH-DSLAM-09 atm 1/1/03/14:0.110..104839861-CH-DSLAM-09-1-003-14.....E...."] [Service-Name] [Host-Uniq 0x0004] [AC-Name "ttpchcrt04"] [AC-Cookie "} 10:55:41.917706 PPPoE  [ses 0x786b] LCP, Conf-Request (0x01), id 1, length 16
10:55:43.933653 PPPoE  [ses 0x786b] LCP, Conf-Request (0x01), id 2, length 16

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Alex_LAN     Created Sep 28, 2016 07:02:26 Helpful(0) Helpful(0)

LCP ConfACK packets lost on PPPoE over ADSL/VDSL int

It looks like a DTS2015101208010 bug, but at LCP negotitaion state.

=======

DTS2015101208010
Symptom:

The AR functions as a PPPoE client
to connect to a carrier's device,
and PAP authentication is
configured. Negotiation fails.
Condition:
The AR functions as a PPPoE client
to connect to a carrier's device,
PAP authentication is configured,
and the PPPoE server sends ACK
packets without the content to the
PPPoE client.

Root Cause:
During PAP authentication, when the
PPPoE client receives ACK packets
without the content from the PPPoE
server, the PPPoE client determines
that the packet length is too short
and considers the packets as
unexpected packets.

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Alex_LAN     Created Nov 23, 2016 04:35:26 Helpful(0) Helpful(0)

Solved.

>> system-view
>> [Huawei] set priority dot1p 0

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