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How to handle the problem which the board type is LPUF-21-B lead to binding VPN interface discards all the packet when ping

Publication Date:  2019-07-04 Views:  147 Downloads:  1

Issue Description

When CX600-X3 ping the interface  which is  connected  the CX600-X3 VPN interface directly, the packets are all lost.

Handling Process

1. Whether the both interfaces learn ARP correctly.
2. Whether  the both interfaces are binded VPN correctly.
3. Whether the  board support VPN service.

Root Cause



1.Checked whether the ping  is ok or failure.


<D2586-CX3-01>ping -vpn-instance TX-OM
PING 56 data bytes, press CTRL_C to break
Request time out
Request time out
Request time out
Request time out
Request time out

--- ping statistics ---
5 packet(s) transmitted
0 packet(s) received
100.00% packet loss

2. Checked whether interface  learn ARP table and found it had learned.

<D2586-CX3-01>dis arp int g1/0/4
------------------------------------------------------------------------------ 0819-a627-ebd8 I - GE1/0/4 TX-OM 00b0-ae01-353c 20 D-1 GE1/0/4 TX-OM
Total:2 Dynamic:1 Static:0 Interface:1

3. Checked the configuration of the VPN in both sides, found the configuration is normal


interface GigabitEthernet1/0/4
description TimeProvider_SYNCH
undo shutdown
ip binding vpn-instance TX-OM
ip address

4.Checked the board type and found it is  LPUF-21-B, it is not the same with the other boards which are binded VPN, the other boards type is LPUF-21-A.


<D2586-CX3-01>display device 1
slot1's detail information:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Description:Flexible Line Processing Unit(LPUF-21) B
Board status: Normal
Register: Registered
Uptime: 2012/03/14 22:24:38
CPU Utilization(%): 15%
Mem Usage(%): 35%
Clock information:
State item State
Current syn-clock: 4
Current line-clock: 6
Syn-clock state: Locked VCXO_OK REF_OK
Syn-clock 4 state: Actived
Syn-clock 5 state: Actived
Line-clock 6 state: Actived
Line-clock 7 state: Actived
Statistic information


5. Tried "set board-type" command to change the board type as LPU. Note that when there are services and flow in the device, it  need to  confirm with  customers whether can operate.

[D2586-CX3-01-hidecmd]set board-type slot 1 lpu
Setting succeed,please reset slot<1> to make the new configuration enable.
< D2586-CX3-01>reset slot 1
Info: Caution!!! Confirm to reset slot 8! Continue?[Y/N]Y
Board 1 is being reset.
< D2586-CX3-01>

Now you enter a hidden command view for developer's testing, some commands may
affect operation by wrong use, please carefully use it with HUAWEI engineer's
[D2586-CX3-01-hidecmd]dis board-type slot 1
The board type:LPU.


6. Found that the problem had been resolved.

<D2586-CX3-01>ping -vpn-instance TX-OM
PING 56 data bytes, press CTRL_C to break
Reply from bytes=56 Sequence=1 ttl=60 time=1 ms
Reply from bytes=56 Sequence=2 ttl=60 time=2 ms
Reply from bytes=56 Sequence=3 ttl=60 time=2 ms
Reply from bytes=56 Sequence=4 ttl=60 time=2 ms
Reply from bytes=56 Sequence=5 ttl=60 time=2 ms

--- ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 1/1/2 ms


LPUF-21-B board interface can be bound to VPN, but there is ping problem. It is need to change the board type as LPU board.Or by license to load resource items LCX6KBEN06, the LPUF-21-B board upgrade to LPUF-21-A board.Then it can completely support VPN service.