IBM ATM OC-3c Instrukcja Użytkownika Strona 70
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9-4 C
HAPTER
9: M
ONITORING
THE
ATM M
ODULE
Receive Errors
Shows the percentage of cells
received that have errors. For example, cells received
with corrupted header information (
Header Error
Control – HEC
).
Receive Errors indicate that there is something wrong
with the link, and you should check for the following
faults:
■
Weak transmitter. Contact your supplier or
Technical Support, as described in Appendix E.
■
The optic fiber cable is too long or does not meet
other technical specifications. Check the cable
against the technical specification given in
Appendix C, “ATM Module Technical Specifications”.
■
The optic fiber connectors are dirty. To clean the
connectors, follow the instructions given in
“Cleaning Dirty Fiber Optic Connectors”, on page
D-24.
■
If there is no traffic on the port, but there are
Receive Errors, the SONET
Scramble
techniques on
the ATM Module and ATM Switch are probably
incompatible. Ensure that the SONET standards
used are the same for the ATM Module and the
ATM Switch.
The screen also shows the AAL5 layer statistics. AAL is
a set of protocols that translate user traffic from
higher-layer applications/protocols into small, fixed
size cells, and reassembles them into the higher level
frame format at the destination device. The ATM
Module supports AAL5. The screen shows the
following AAL5 Layer statistics:
Frames Received
The number of frames received per
second at the AAL5 interface for all traffic types (data
and control).
Frames Transmitted
The number of frames
transmitted per second at the AAL5 interface for all
traffic types (data and control).
Errored Frames
The number of frames received that
contain an error.
Octets Received
The number of Ethernet octets
received at the AAL5 interface.
Octets Transmitted
The number of Ethernet octets
transmitted at the AAL5 interface.
Discarded Frames
The number of frames discarded
at the AAL5 interface due to lack of resources.
- User’s Guide 1
- Introduction 7
- Terminology 7
- Conventions 8
- Related Documentation 9
- ATM Benefits 11
- ATM Module Features 12
- Figure 2-1 13
- Network Layer Architecture 13
- Upper Layer Protocols 14
- What is LAN Emulation (LANE)? 14
- LAN Emulation Components 15
- Figure 2-2 16
- Joining the ELAN 17
- Figure 2-3 18
- ATM Adaptation Layer (AAL) 20
- ATM is Service Transparent 21
- ATM is Connection-oriented 21
- Figure 2-6 22
- Connection Terminology 22
- Figure 2-7 23
- ATM Interfaces 24
- Figure 2-9 25
- UNI Management Entities 25
- Figure 2-10 26
- ATM Cell Structure 26
- Physical Layer 27
- What is a Virtual LAN (VLAN)? 29
- Creating Inter-switch VLANs 29
- Figure 3-2 30
- VLAN to ELAN Mapping 30
- Figure 3-3 31
- Planning Your Network 33
- ATM Configuration Rules 34
- Figure 4-1 36
- ONFIGURATION 37
- Campus Configuration 38
- Campus Configuration 5-3 39
- Figure 5-3 40
- Resilient Link Configuration 40
- Following Safety Information 41
- Nebezpečenstvo: 42
- Device Support 43
- Pre-installation Procedure 43
- Installation 44
- Post-Installation Checks 45
- LED Summary 46
- Checking the Power Supply 47
- CCESSING 49
- ANAGEMENT 49
- Figure 7-1 50
- Screen Map 50
- Logging On 51
- Logging Off 52
- Figure 8-1 53
- Management Screen Map 53
- Configuring an ATM Port 54
- Configuring an ATM Port 8-3 55
- Figure 8-3 56
- ATM LEC Setup Screen 56
- Displaying all VLANs 57
- ATM Port Setup 58
- ATM Port Setup 8-7 59
- Mapping Far End MAC Addresses 60
- Displaying an ATM Connection 62
- Setting Up Resilient Links 63
- Upgrading Software 64
- Error Messages 65
- Status Messages 66
- ONITORING 67
- Statistics Overview 68
- ATM VLAN LEC Status 71
- ATM VLAN LEC Status 9-7 73
- ATM VLAN LEC Status 9-9 75
- ATM Physical Layer Statistics 76
- Figure 9-5 77
- Physical Layer Statistics 77
- NFORMATION 81
- Safety Notices A-3 83
- Safety Notices A-5 85
- Safety Notices A-7 87
- PECIFICATIONS 91
- C: ATM M 92
- ATM Cable Specification C-3 93
- Using LEDs 96
- Identifying the Problem 97
- Figure D-1 98
- Troubleshooting Flow Diagram 98
- Figure D-2 99
- Figure D-3 100
- ATM Port Setup Screen 100
- Figure D-4 101
- ATM Port Statistics 101
- Figure D-5 102
- ATM VLAN LEC Status Screen 102
- Identifying the Problem D-9 103
- ROUBLESHOOTING 104
- Identifying the Problem D-11 105
- Identifying the Problem D-13 107
- Is the LEC Operational Now? 108
- — Go to step 25 108
- ELAN Configuration Problems 109
- Figure D-8 110
- ATM VLAN LEC Setup 110
- Solving Known Problems 111
- Power Supply Problems 112
- Solving Known Problems D-19 113
- Cable Connection Problems 114
- ATM Problems 115
- VLAN or ELAN Problems 116
- Solving Known Problems D-23 117
- ECHNICAL 119
- RADEMARKS 121
- ARRANTIES 121
- Statement of Limited Warranty 122
- Warranty Service 123
- Extent of Warranty 123
- Limitation of Liability 124
- Electronic Emission Notices 125
- European Union (EU) Statement 126
- (VCCI) Statement Class B 127
- Information To The User 127
- IBLIOGRAPHY 135
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