Transcript OBD003301 MA5300 Troubleshooting

OBJ009302
MA5300 Broadband Access
Equipment Troubleshooting
ISSUE 1.0
Fixed Network Curriculum
Development Section
Objectives
Upon Completion of this course, you will be able to:

Master basic troubleshooting methods.

Use the commonly used commands to identify the
problems.

To solve the common service faults in MA5300.
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Security Level: Internal
Contents
Some Ideas in Troubleshooting
How to Troubleshoot in MA5300
Service Troubleshooting in MA5300
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Security Level: Internal
Some Ideas in Troubleshooting
General procedure of troubleshooting.

Recognizing Symptoms

Understanding the Problem

Identifying Cause of the Problem

Solving the Problem
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Some Ideas in Troubleshooting
Common methods in troubleshooting:

Layer-based analysis

Isolation analysis

Comparison analysis

Swapping analysis
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Layer-based Analysis
Application
Presentation
Session
Transport
Network
Destination unreachable, …
Data Link
PVC, VLAN, PPP link fail…
Physical
Cable fail, board fail, cable disconnected…
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Isolation Analysis
DHCP Server
IP Network
Radius Server
VDSL Modem
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DSLAM
BAS
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Comparison Analysis
IP CORE
NMS
AAA Server
iTELLIN OpenDSE
iManager N2000
L3
AS)
BBAS)
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MA5300(Ä
MA5300(Built-in
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Ordinary
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subscribers
Swapping Analysis
FTP Server
DHCP Server
IP Network
Radius Server
Low Speed
VDSL Modem
DSLAM
BAS
Swap
Component
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Troubleshooting Tools
Common tools used in troubleshooting:

Command Line

NMS

Network analyzer (Ethereal, Sniffer, Analyzer…)
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Contents
Some Ideas in Troubleshooting
How to Troubleshoot in MA5300
Service Troubleshooting in MA5300
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Physical Layer Troubleshooting
Indicator
Modem:
ADSL line sync, Ethernet state
Board:
RUN, ALARM
Interface:
State, Data
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Physical Layer Troubleshooting
Alarm
[BAS]display trap
Display trap buffer:
#
[02/23/2004
23:57:33-]
DEV-2-070f2004:frame
0
slot
subslot 0 port 10 up
……
MA5300(config)#show alarm list all
ALARMID
OUTPUT STATISTIC
ALARM_NAME
0x00200000
YES
NO
15-minute threshold alarm
0x00200001
YES
NO
24-hour threshold alarm
0x02300003
YES
NO
Clock SDH source switch
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0
Physical Layer Troubleshooting
Display state of the interface.
[bas1-for-nms]display interface Ethernet 5
Ethernet5 current state : DOWN
Line protocol current state : DOWN
Description : HUAWEI, ISU, Ethernet5 Interface
The Maximum Transmit Unit is 1500, The keepalive is 10(sec)
…
MA5300(config)#show interface adsl 0/0/0
Adsl0/0/0 is administratively down
The ADSL link is deactive
Bind line-profile No.1 LINE-PROFILE-1
Bind alarm-profile No.1 ALARM-PROFILE-1
…
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Physical Layer Troubleshooting
Display working state of the board
MA5300(config)#show board 0
SlotID
0
1
2
3
4
5
6
7
8
BoardName Status
EADA
Normal
ESMA
ESMA
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SubType1
Active_normal
Standby_normal
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O2GAE
O2GAE
SubType2
E4FE
E4FE
Physical Layer Troubleshooting
ADSL line condition
MA5300(config)#show adsl line state
Current Link Status
:
Atuc
Current Snr Margin(dB)
Current Chan Attenuation(dB)
Current Output Power(dBm)
Current Attainable Rate(Kbps)
Current Transmission Mode
Channel Interleave Delay(ms)
Channel Current tx-Rate(Kbps)
Atur
…
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adsl 0/0/0
deactive
:
:
:
:
:
:
:
0
0
0
0
NONE
0
0
Data Link Layer Troubleshooting
Check working mode of Modem
Check the pvc configuraiton
MA5300(config)#show interface adsl 0/0/0
Adsl0/0/0 is administratively down
The ADSL link is deactive
Bind line-profile No.1 LINE-PROFILE-1
Bind alarm-profile No.1 ALARM-PROFILE-1
Line coding type is DMT
Local-Tx-Rate
0
Kbps,
Remote-Tx-Rate
_ADSL_TX
……
PVC: vpi is 0, vci is 35
……
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0
Kbps,
Data Link Layer Troubleshooting
Check the VLAN configuration
MA5300(config)#show vlan
Now, the following vlan exist(s):
1(default), 99, 128-175
MA5300(config)#show interface adsl 0/0/0
Adsl0/0/0 is administratively down
The ADSL link is deactive
……
PVID is 128
……
Port mode: access
Tagged
VLAN ID : none
Untagged VLAN ID : 128
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Data Link Layer Troubleshooting
MA5300(config)#show interface gigabitEthernet 7/1/1
GigabitEthernet7/1/1 is up
Hardware is Gigabit Ethernet, Hardware address is
00e0.fc1e.efc9
…….
PVID is 1
Priority is 0
Max multicast group count: 2
Port mode: trunk
Vlan passing : 1(default vlan), 99
Vlan allowed : 1(default vlan), 2-4000
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Network Layer Troubleshooting
Check IP configuration of the customer’s computer.
Display interface state
[BAS]display interface GigabitEthernet 10
GigabitEthernet10 current state : UP
Line protocol current state : UP
Description : HUAWEI, ISU, GigabitEthernet10
Interface
……
Ping
MA5300#ping 172.31.1.53
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Network Layer Troubleshooting
Check IP route
<BAS>display ip routing-table
Routing Table: public net
Destination/Mask
Proto
Pre Cost Nexthop
Interface
127.0.0.0/8
DIRECT
1
0
127.0.0.1
InLoopBack0
127.0.0.1/32
DIRECT
1
0
127.0.0.1
InLoopBack0
MA5300(config)#show ip route
Routing Tables:
Destination/Mask Proto Pre Metric Nexthop
Interface
127.0.0.0/8
DIRECT
0
0
127.0.0.1 InLoopBack0
172.31.1.0/24
DIRECT
0
0
172.31.1.52 Vlan-interface99
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Network Layer Troubleshooting
Debug
<BAS>terminal monitor
<BAS>terminal debugging
<BAS>debugging dhcpr packet
Trace
<BAS>trace object ?
ethernet
Object
gigabitethernet Object
ip-address
Object
mac-address
Object
trunk
Object
user-name
Object
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ethernet number
ethernet number
ip address
mac address
trunk number
user name
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Contents
Some Ideas in Troubleshooting
How to Troubleshoot in MA5300
Service Troubleshooting in MA5300
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PPPoE Service Troubleshooting
Common service problems in MA5300:

User cannot find the PPPoE server.

Username or password is incorrect.

Low speed.
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PPPoE Service Troubleshooting
User cannot find the PPPoE server.
Cause: The PPPoE client cannot find the PPPoE server.
Locating problem: Physical layer, or data link layer.
Solving problems:
[User]

Check the PPPoE client was installed correctly;

Check the Physical connection between computer and
modem, modem and the phone line;

Check modem was configured correctly;
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PPPoE Service Troubleshooting
[DSLAM]

Check the EAD board state, and the ADSL line state;

Check the connection between DLSAM and BAS;

Check the vpi/vci of the ADSL port;

Check the VLAN configuration in DSLAM;
ADSL port and uplink ethernet port.
[BAS]

Check the PPPoE configuration in BAS.
Virtual-template and whether the port is bound with VT.
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PPPoE Service Troubleshooting
Username or password is incorrect.
Cause: user cannot pass authentication.
Locating problem: PPP link layer, network layer. Physical layer
works. Physical layer is working normally.
Solving problems:
[User]

Confirm the user input correct username and password;
[BAS]

Check the authentication configuration in BAS, whether the
user uses local authentication or Radius authentication.
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PPPoE Service Troubleshooting

If the user uses local authentication, check whether this
username and password was configured in the BAS correctly.

If the user uses Radius authentication, check the Radius
configuration.
[External equipment]

Check the Radius server is working normally, and is reachable.

Check the username and password was configured in the
Radius correctly.
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PPPoE Service Troubleshooting
Low speed.
Solving problems:
[User]

Check the user’s computer’s hardware configuration, and
running performance.

Check the cable and line is fully connected.
[DSLAM]

Check the quality of the ADSL line

Check the transmission rate configuration of the ADSL line
profile.
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PPPoE Service Troubleshooting
[BAS]

Check the CAR configuration of the user.

Ping destination IP address to see whether there is a traffic
bottleneck to the destination in network.

If possible, connect a server directly with BAS, observe the
traffic on the user’s computer.
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DHCP Service Troubleshooting
User cannot obtain IP address.
Locating problem: physical layer, data link layer, network layer.
Solving problem:
[User]:

Check the IP configuration of the computer.

Check the Physical connection between computer and
modem, modem and the phone line;

Check modem was configured correctly;
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DHCP Service Troubleshooting
[DSLAM]

Check the EAD board state, and the ADSL line state;

Check the connection between DLSAM and BAS;

Check the vpi/vci of the ADSL port;

Check the VLAN configuration in DSLAM;
[BAS]

Check the service configuration.

If the external DHCP is used, check the DHCP server is
working normally and reachable.
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DHCP Service Troubleshooting
[External equipment]

Make sure the configuration in DHCP server is correct.
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DHCP Service Troubleshooting
Low speed.

Same as PPPoE service.
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Security Level: Internal