Huawei MA5600 - The Broadcast Packets Cause the 678 Error for the User Dialup Through Certain Modems Connected to the MA5600 After the Cutover

NGN Cases Chapter 1 MA5600 Cases
Confidential Information of Huawei. No Spreading without Permission
4
Configure the broadcast traffic suppression on all ports, and the index of the profile is 2:
huawei(config-if-scu-0/7)#traffic-suppress broadcast value 2 all
Command:
display traffic-suppress { portid | all }
1.3 The Broadcast Packets Cause the 678 Error for the User Dialup Through Certain
Modems Connected to the MA5600 After the Cutover
Title:
The Broadcast Packets Cause the 678 Error for the User Dialup Through Certain Modems
Connected to the MA5600 After the Cutover
ID: SE0000364212
Information
Type :
Troubleshooting Cases Quality Level:
C
Product Family: Broadband Access Product: SmartAX MA5600
Fault Type: Upgrade/Cutover
Keywords: Broadcast, modem, 678
Permission Level: 03Equipment Users Permission
Phenomenon Descr
iption:
Before the cutover: MA5200G-----MA5600-----modem----PC (each port of the MA5200G is
connected to one MA5600)
After the cutover: MA5200G-----S7802 (convergence switch)-----MA5600
(multiple)-----modem-----PC
Before and after the cutover, the data on the MA5600 is the same, and two PVCs are configured
on each port of the MA5600
8 /46(smart vlan19) E8-2 management vlan
0/35(stacking vlan 1225 ) E8-2 PPPOE service vlan
Before the cutover, the modem in the bridge mode of the A Company works normally and the
user can go online through the modem dialup. After the cutover, the user fails to go online
through the dialup with the modem of the A company, with the 678 error displayed. Other
modems on the same port work in the normal state.
Alarm Informatio
n:
The 678 error is displayed through the dialup on the PC.
Cause Analysis:
After the cutover, the sub-port is re-planned only on the MA5200G. That is, VLANs are
transparently transmitted on the S7802. Therefore, it is possible that the fault is caused in the
following conditions:
1. On the MA5200G, the configuration of the inner VLAN of the QinQ VLAN is incorrect, or
the range of the inner VLAN is small.
2. The network planning of the S7802 is incorrect.
Handling Proces
s:
1. Check the data of the MA5200G. It is found that the data is correct.
2. Check the condition that the S7802 learns the MAC address of the PC.
Modem of the A company:
<MinHe_S7802>dis mac-address 0040-d06e-c3b7
MAC ADDR VLAN ID STATE PORT INDEX AGING TIME(s)
0040-d06e-c3b7 19 Learned Ethernet3/0/3 AGING
Huawei’s modem:
MinHe_S7802>dis mac-address 0040-d06e-c3b7
MAC ADDR VLAN ID STATE PORT INDEX AGING TIME(s)
0040-d06e-c3b7 19 Learned Ethernet3/0/3 AGING
0040-d06e-c3b7 1220 Learned Ethernet3/0/3 AGING
It is found that the 678 error is displayed because the S7802 learns the MAC address of the PC
connected to the modem of the A company, and the MAC address corresponds to VLAN 19.
3. Check the condition that the MA5600 learns the MAC address of the PC. The condition is the
same as that displayed in step 2. After PVC 8/46 carrying the E8-2 service is deleted on the
MA5600, reset the modem. It is found that the dialup on the PC is in the normal state. In