IBM OPTIONS ATM OC-3c User Manual Download

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8271 Nways Ethernet LAN Switch
ATM OC-3c Module

User’s Guide

Summary of Contents for OPTIONS ATM OC-3c

Page 1: ...8271 Nways Ethernet LAN Switch ATM OC 3c Module User s Guide...

Page 2: ...your locality Publications are not stocked at the address given below If you have any comments on this publication please address them to Department CGF Design Information Development IBM Corporation...

Page 3: ...ning the ELAN 2 5 Locating the LECS 2 5 Mapping Ethernet and ATM Addresses 2 6 Address Resolution 2 6 LAN Emulation Address Resolution Protocol LE_ARP 2 7 What Happens to Unicast Frames 2 7 What Happe...

Page 4: ...lled Correctly 6 7 Checking the Physical Connections 6 7 7 ACCESSING MANAGEMENT FEATURES Screen Map 7 1 Keyboard Shortcuts 7 1 Correcting Text Entry 7 1 Logging On 7 3 Logging Off 7 4 Automatic Logout...

Page 5: ...SUPPORT AND SERVICE Electronic Support E 1 WWW E 1 FTP E 1 IBM Bulletin Board System E 1 Voice Support E 1 F NOTICES TRADEMARKS AND WARRANTIES Trademarks F 1 Statement of Limited Warranty F 2 Producti...

Page 6: ......

Page 7: ...should always follow the information in the Release Notes if it is different from the information given in this guide Terminology In this User s Guide the term ATM Module is used when referring to the...

Page 8: ...roubleshooting Appendix D Troubleshooting Getting Technical Support Appendix E Technical Support and Service Identifying terms Glossary Further reading Bibliography Table 1 Notice Icons Icon Notice Ty...

Page 9: ...e Quick Reference Guide Part Number 02L1333 IBM 8271 Nways Ethernet LAN Switch ATM OC 3c Module Release Notes Part Number 02L1334 Words in Italics Italics emphasize a point or denote new terms at the...

Page 10: ...4 ABOUT THIS GUIDE...

Page 11: ...Release Notes that accompany the ATM Module list the IBM 8271 Nways Ethernet LAN Switches that support the ATM Module ATM Benefits ATM is the only technology specifically designed to carry voice video...

Page 12: ...nd 3 1 Interim Local Management Interface ILMI AAL5 ATM Adaptation Layer 16 Virtual LANs VLANs RMON per Emulated LAN RMON Groups supported Alarms Events Statistics History Data buffer to store 40 000...

Page 13: ...Network Configuration Examples provides some examples of how you can use the ATM Module within an ATM networks If you are already familiar with these concepts refer to Chapter 6 Installing and Setting...

Page 14: ...ELANs on a single ATM network Some of these ELANs could be carrying Ethernet traffic and others could be carrying Token Ring traffic Traffic from one ELAN is not seen on another ELAN as they are logi...

Page 15: ...lient and component in the ELAN Broadcast and Unknown Server BUS Each ELAN has a Broadcast and Unknown Server BUS The BUS forwards frames that it receives from any client to all of the clients in the...

Page 16: ...shown in Figure 2 2 is not a LAN Emulation component but would be required should a device on one Emulated LAN need to communicate with a device on another Emulated LAN You may wish to have more than...

Page 17: ...LECS for more details of the policies your LECS uses If the network does not have a LECS the LEC gets the LES address from the management software on the ATM device 3 The LEC must have a connection to...

Page 18: ...keeps a LAN Emulation ARP Table which should not to be confused with the IP ARP Table The ARP Table lists the remote destination MAC addresses and the ATM address of the LEC though which each destina...

Page 19: ...location of the destination address is known the LEC sets up a direct connection to the LEC serving the destination address If the location of the destination address is unknown a unicast frame is se...

Page 20: ...data oriented protocol The ATM Module will only work with other AAL5 devices Asynchronous Transfer Mode ATM Layer Asynchronous Transfer Mode ATM is a connection oriented transmission protocol that has...

Page 21: ...s a connection oriented transport service that requires a communication channel to be set up between the ATM source and destination end systems before ATM cells can pass between them Before a direct d...

Page 22: ...contains the VPI VCI values associated with the virtual channel it is going to take to get to the next ATM Switch in the connection Each ATM switch knows that when it receives a cell with a particular...

Page 23: ...Asynchronous Transfer Mode ATM Layer 2 11 Figure 2 7 Switching Cells using VPI and VCI values...

Page 24: ...time PVC attributes include Connections initiated by network management Long term connection duration Automatically re established after network failure Supported by MIB or other management entity Th...

Page 25: ...mple of an ATM address is shown below 47007900000000000000000000 00A03E000001 00 An ATM address consists of three sections of information and is 20 bytes in length network host identifier Where networ...

Page 26: ...following fields Generic Flow Control GFC Provides local functions such as flow control over the User to Network Interface UNI The value encoded in the GFC is not carried end to end and can be overwr...

Page 27: ...es its own Path through the SONET SDH layer Line A line is the whole path between one ATM device and the adjacent ATM switch or ATM end station Section When ATM is used for telephone networks a line m...

Page 28: ...2 16 CHAPTER 2 NETWORK LAYER CONCEPTS...

Page 29: ...ate VLANs that closely correspond to how your network and business functions For example marketing personnel in different physical locations could be part of one VLAN and finance personnel could be in...

Page 30: ...t traffic is mapped to an ELAN by a VLAN to LEC association The mapping of VLANs to ELANs is shown in Figure 3 2 When an Ethernet device attached to a Switch generates traffic the Switch forwards the...

Page 31: ...Extending VLANs into the ATM Network 3 3 Figure 3 3 Extending VLANs into the ATM Network...

Page 32: ...3 4 CHAPTER 3 VIRTUAL LAN CONCEPTS...

Page 33: ...topology and decide if further configuration is required In particular you should consider the location of your LAN Emulation services Does your existing ATM network have sufficient resources Conside...

Page 34: ...es Allow for attenuation weakening of signal when calculating cable lengths Ensure that you have sufficient bandwidth Refer to Appendix C ATM Module Technical Specifications for more details You canno...

Page 35: ...the scope of this user guide Consult the user guide that accompanies the device implementing the LECS or LES Alternatively if your LEC will not be using a LECS and is being configured manually ensure...

Page 36: ...RK TOGETHER Figure 4 1 shows an example of a network configuration where a remote edge device does not support LAN Emulation based on SVCs it only supports PVC LAN Emulation Figure 4 1 SVC Signalling...

Page 37: ...s full duplex link to the backbone Using ATM as a backbone technology removes bottlenecks by providing scalable bandwidth low latency high speed data switching Ethernet VLANs can be extended into the...

Page 38: ...Building A is switched over Fast Ethernet In addition an ATM link to the campus backbone provides high speed access to remote services Building B shows how you can configure a building in a cost effic...

Page 39: ...Campus Configuration 5 3 Figure 5 2 Campus and Cost Sensitive Network...

Page 40: ...rk failure by using a main and a standby link Should the main link fail a standby link automatically takes over the function of the main link In this example the ATM Module fiber link provides the mai...

Page 41: ...tlijnen lezen in Appendix A Safety Information van deze handleiding Perigo Antes de instalar ou remover qualquer componente de um dispositivo ou executar qualquer trabalho de manuten o voc deve ler as...

Page 42: ...kuin asennat laitteeseen osia tai irrotat niit siit tai teet huoltotoimia lue t m n julkaisun liitteess A Safety Information olevat turvaohjeet Nebezpe P ed instalac nebo odstran n m libovoln komponen...

Page 43: ...isted in the Release Notes that accompany your ATM Module Pre installation Procedure This section describes the procedures you need to perform before installing the ATM Module Check the Power Supply B...

Page 44: ...r to the manual which accompanies your Switch to locate the slot where the ATM Module is located 4 Use the guide rails within the Switch slot to align the ATM Module The location of the guide rails an...

Page 45: ...mplete and includes Checksum tests of boot and system areas of Flash memory System memory tests MAC address verification test System timer test CAM Contents Addressable Memory tests Console Port tests...

Page 46: ...T LED is flashing yellow Switch has not recognized the ATM Module The ATM Module is not installed or a link is not present on the ATM port or the ATM Switch is not on Table 6 2 LEDs on the ATM Module...

Page 47: ...Logging On on page 7 3 If the ATM Module is installed correctly the ATM CONFIGURATION option appears in the Main Menu If the ATM CONFIGURATION option does not appear You may have an incompatible vers...

Page 48: ...cable 5 If you suspect that the fiber optic connector is dirty refer to Cleaning Dirty Fiber Optic Connectors on page D 24 6 Check that your cable meets the specifications described in ATM Cable Spec...

Page 49: ...y appear when the ATM Module is installed If these screens do not appear your ATM Module is not installed correctly Keyboard Shortcuts There are several special characters or combinations of keyboard...

Page 50: ...7 2 CHAPTER 7 ACCESSING MANAGEMENT FEATURES Figure 7 1 Screen Map...

Page 51: ...changed If your terminal is already setup with these values the Main Banner will appear as soon as power up is complete 3 At the Main Banner press Return to display the Logon screen as shown in Figur...

Page 52: ...within 10 seconds the timer will expire and the screen will be locked any displayed statistics will continue to be updated When you next press any key the display changes to the Auto Logout screen The...

Page 53: ...how to manage the ATM Module If you wish to view statistics refer to Chapter 9 Monitoring the ATM Module Figure 8 1 shows the screen map Management features are shown in gray to help you locate the s...

Page 54: ...Menu Alternatively if you are already in the ATM Port Setup Screen as described in ATM Port Setup on page 8 6 you can select the CONFIG button An example of the ATM Module Configuration screen is sho...

Page 55: ...Switch is non standard you may need to amend the MAX VPI Bits 0 4 field MAX VPI Bits 0 4 Shows the number of bits available in the cell header that can be used to determine the value of the VPI Up to...

Page 56: ...screen is displayed as shown in Figure 8 2 on page 8 2 Select the ATM LEC SETUP button Alternatively if you are already in the ATM Port Setup Screen as described in ATM Port Setup on page 8 6 you can...

Page 57: ...in the ATM network and be operational 5 Select the APPLY button If the LEC associated with the VLAN is active when APPLY is selected it will temporarily become inactive while the changes are applied a...

Page 58: ...with each of the VLANs To display the screen 1 From the Main Menu select SWITCH MANAGEMENT The Switch Management screen is displayed as shown in Figure 8 4 on page 8 5 2 For the Management Level fiel...

Page 59: ...d possible solutions see Table 8 2 To transmit traffic the port must have a Port State of Enabled and the Link State must be Present Table 8 2 Link State Troubleshooting Summary Problem Solution The c...

Page 60: ...u to displays the ATM and MAC addresses on remote devices The ARP Table screen is described in Mapping Far End MAC Addresses on this page CONNECTION TABLE This button takes you to the ATM Connection T...

Page 61: ...to type in the ATM address of the far end LEC associated with the far end MAC address FIND ATM ADDRESS This button allows you to locate the ATM address mapped to a specified MAC address REFRESH This b...

Page 62: ...view ATM connections in the ATM Connection Table To access the ATM Connection Table screen access the ATM Port Setup screen as described in ATM Port Setup on page 8 6 and then select the CONNECTION TA...

Page 63: ...t and copy a VPI VCI entry from the listbox FIND ATM ADDRESS This button allows you to find an ATM Address REFRESH This button allows you to update the view of ATM connection details Finding an ATM Co...

Page 64: ...ng code has somehow become corrupted The replacement software image must be held or placed on a local server which supports the Trivial File Transfer Protocol TFTP Select the SOFTWARE UPGRADE option f...

Page 65: ...ecord length differs from that implied by the value of the record length field The file you want to download may have been corrupted You should obtain a valid file and try again The record type is not...

Page 66: ...a device Active The file is currently being downloaded to the selected device Allow time for the download to complete Download successful The file you chose to download to the selected device was dow...

Page 67: ...his chapter describes how to monitor the status and performance of your ATM Module Figure 9 1 shows the screen map Monitoring screens are shaded gray to help you locate the screens you need Figure 9 1...

Page 68: ...that the physical connection is operational ATM Physical Layer Statistics screen Errored Seconds Near Errored Seconds Far Severe Errored Sec Near Severe Errored Sec Far Coding Violations Near Coding...

Page 69: ...n Figure 9 2 Figure 9 2 Switch Management Screen 2 Enter the number of the ATM port in the Port ID field 3 Select the STATS button to display the ATM Port Statistics screen 4 An example of the ATM Por...

Page 70: ...M 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 o...

Page 71: ...s button takes you to the ATM VLAN LEC Status screen which allows you to monitor the health of LECs and identifies the cause of any connection failures The ATM VLAN LEC Status screen is described in A...

Page 72: ...because the ATM port has been disabled by management Not in Use You have specified that the LEC is not required at the present time Table 9 3 Last LEC Failure Reason State Possible Causes Possible Sol...

Page 73: ...tally entered the same MAC addresses twice Ensure that MAC addresses are unique Table 9 3 Last LEC Failure Reason State Possible Causes Possible Solutions Duplicated ATM Address A source ATM address d...

Page 74: ...ns Invalid Requestor ID The LEC Identifier LECID is not zero or is not recognized as this LEC s LECID There is a problem with the LEC software Contact 3Com Support Invalid LAN Destination You are tryi...

Page 75: ...nvalid ELAN name Check that each MAC address on your network is unique Check the LAN type used Check that the ELAN name is correct and the ELAN has been set up correctly Table 9 3 Last LEC Failure Rea...

Page 76: ...tting the values shown on the screen does not reset the statistic values stored on this device ATM Physical Layer Statistics The Physical Layer Statistics screen shows SONET STS 3c and SDH STM 1 error...

Page 77: ...ports 1 path Line The Line Layer provides synchronization and multiplexing functions for the Path Layer across the physical medium Section The Section Layer deals with framing scrambling and section e...

Page 78: ...ribes how to use the physical layer statistics to track and resolve problems If no values are shown on the screen the problem probably lies with the ATM Switch rather than the ATM Module Follow the tr...

Page 79: ...8 Check that the cable has not been accidently plugged into an FDDI connector at one end of the connection 9 Check that the ATM Module and ATM Switch are using compatible transmit clocking options 10...

Page 80: ...9 14 CHAPTER 9 MONITORING THE ATM MODULE...

Page 81: ...Infor mation Read This First SD21 0030 This booklet describes safe procedures for cabling and plugging in electrical equipment Varning livsfara Innan du b rja installera den h r produkten b r du l sa...

Page 82: ...s lectriques en toute s curit Pericolo prima di iniziare l installazione di questo prodotto leggere le informazioni relative alla sicurezza riportate nell opuscolo Attenzion Infor mazioni di sicurezza...

Page 83: ...le rt biztons gi inform ci kat Ez a k nyv le rja milyen biztons gi int zked seket kell megtenni az elektro mos berendez s huzaloz sakor illetve csatlakoz tat sakor Pozor Preden za nete z instalacijo t...

Page 84: ...eid moet uitsluitend worden uitgevoerd door getraind personeel Verra Yksik n saavat asentaa ja irrottaa vain t h n koulutetut henkil t Pericolo L installazione e la rimozione dell unit devono essere e...

Page 85: ...IEC 950 SELV Safety Extra Low Volt age betrieben Angeschlo en werden k nnen nur Ger te die ebenfalls nach SELV betrieben werden Gevarr Deze eenheid werkt onder SELV Safety Extra Low Voltage volgens IE...

Page 86: ...ed str m fra kretser med ekstra lav spenning SELV kretser i henhold til standarden IEC 950 Denne spenningen opprettholdes kun dersom utstyret som det er koblet til ogs drives av s kalte SELV kretser P...

Page 87: ...Safety Notices A 7 IEC 950 SELV SELV...

Page 88: ...A 8 APPENDIX A SAFETY INFORMATION...

Page 89: ...s that can be performed by users for each of the security access levels is as follows Security Specialist read and write Manager read and write Monitor Secure Monitor read only Table B 1 shows the acc...

Page 90: ...B 2 APPENDIX B SCREEN ACCESS RIGHTS...

Page 91: ...dard defined by ANSI x 3 166 1992 IBM supports 62 5 125mm Multi Mode Fiber MMF PMD The maximum inter station distance including device to network connectors should not exceed 2 kilometers 1 25 miles T...

Page 92: ...dget analysis Contact the vendor s for values to use in your analysis Does the Cable Provide Sufficient Bandwidth Bandwidth for multi mode fiber is referred to as modal bandwidth because it varies wit...

Page 93: ...orten the length of the fiber or use a different fiber until the result of the calculation reaches 250MHz Example A cable with modal bandwidth of 500 MHz km will have 250 MHz of bandwidth at 2km 1 25...

Page 94: ...C 4 APPENDIX C ATM MODULE TECHNICAL SPECIFICATIONS...

Page 95: ...ntify the Problem Use this section when you do not know the cause of the problem Solving a known Problem Use this section when you have detected a problem and want to look up possible solutions You sh...

Page 96: ...recognized the ATM Module The ATM Module is not installed or a link is not present on the ATM port or the ATM Switch is not on Table D 2 LEDs on the ATM Module LED Name Color State Indicates Far End...

Page 97: ...described in more detail in the text This section assumes that the following conditions have been met The ATM Module has been installed correctly as described in Chapter 6 Installing and Setting Up th...

Page 98: ...D 4 APPENDIX D TROUBLESHOOTING Figure D 1 Troubleshooting Flow Diagram...

Page 99: ...and IBM 8271 Nways Ethernet LAN Switch Model 712 Port 25 on an IBM 8271 Nways Ethernet LAN Switch Model 624 and IBM 8271 Nways Ethernet LAN Switch Model 524 d Select the STATS button The ATM Port Stat...

Page 100: ...Cleaning Dirty Fiber Optic Connectors in this section f Check that your cable meets the specifications described in ATM Cable Specification on page C 1 g Replace the cable with a cable known to be wo...

Page 101: ...is entered in the Port ID field d Select the STATS button The ATM Port Statistics screen is displayed An example of the Port Statistics screen is shown in Figure D 4 Figure D 4 ATM Port Statistics Are...

Page 102: ...e LEC ATM Address Valid for the Default VLAN Check that the ATM address in the LEC ATM Address field is valid For example if the first part of the address the network prefix is all zeros the ATM Switc...

Page 103: ...M Switch to see if you can configure ILMI and check to see if it is turned on Is ILMI turned on at the ATM Switch Yes go to Step 15 No go to Step 14 Turn ILMI On Turn ILMI on at the ATM Switch Refer t...

Page 104: ...and MAX VCI Bits settings determine how many bits are used within each cell header to define the value of the VPI and VCI The VPI and VCI values identify the connection Some ATM devices automatically...

Page 105: ...connect to the LECS to receive LANE configuration information Reading Configuration from LECS The LEC receives configuration information from the LECS in preparation for joining the LES Joining LES Th...

Page 106: ...d Unknown Contact Technical Support Version Not Supported LANE 1 0 not supported The LANE services you are trying to connect to do not support LANE version 1 0 Ensure that the LANE Services use LANE 1...

Page 107: ...t Resources There are insufficient resources to grant a request Too many connections have been requested and the tables used by the LES may be full and the connection cannot be set up The ATM Switch i...

Page 108: ...tered an invalid ELAN name Check that each MAC address on your network is unique Check the LAN type used Check that the ELAN name is correct and the ELAN has been set up correctly continued Table D 4...

Page 109: ...be able to communicate except through the use of a routing protocol Are the LECs on the same ELAN and LAN type Yes go to step 3 No go to step 2 Re map or Route the LEC Devices will not be able to comm...

Page 110: ...the Switch Database none of the LECs on the Switch can act as a proxy for that device All LE_ARP requests will fail to locate the MAC address and the requesting LEC will not be able to map an ATM add...

Page 111: ...already pin pointed the problem and wish to look up possible solutions Solutions are presented as a series of tables and each table relates to a logical problem area Power Supply problems Power On Sel...

Page 112: ...Switch powers up but then shuts itself down after a few minutes Insufficient power supply Wiring closet is too hot Vents are blocked System fans are not operating If the Switch powered up correctly b...

Page 113: ...e on your Switch is not correct There is a hardware problem with the Switch Upgrade the version of software on the Switch Contact Technical Support ATM Module Fails Power ON Self Test POST MGMT LED is...

Page 114: ...optic is caught under a heavy object or become bent out of shape The cable connector may be dirty The cable may be broken The connector itself is physically damaged Ensure that both ports are enabled...

Page 115: ...in ATM VLAN LEC Status on page 9 5 shows that the LEC is Inactive and there is no network prefix for the LEC ATM address The ATM Switch connected to the ATM Module is using a different VPI VCI value...

Page 116: ...mismatched Refer to Intermittent failure of a configured LEC to connect to the LECS or LES below Ensure that both LECs are within the same VLAN ELAN LECs not in the same VLAN ELAN can only communicate...

Page 117: ...lue in a pre set range of values supported by the source Switch If the adjacent ATM Switch does not support these values it rejects the connection and an insufficient resource error message is display...

Page 118: ...erformance on that port indicated by an increase in the Errors Received statistic counter The Errors Received statistic counter is described in ATM Port Statistics on page 9 3 To clean fiber optic con...

Page 119: ...here you can access product announcements publica tions and other information regarding hardware and software updates and a technical support infor mation database The direct path to the support area...

Page 120: ...E 2 APPENDIX E TECHNICAL SUPPORT AND SERVICE...

Page 121: ...IBM are the user s responsibility IBM may have patents or pending patent applica tions covering subject matter in this document The furnishing of this document does not give you any license to these p...

Page 122: ...of Installation unless IBM or your reseller informs you otherwise During the warranty period IBM or your reseller if authorized by IBM will provide warranty service under the type of service designat...

Page 123: ...od working order and at least functionally equivalent to the item replaced The replacement assumes the warranty service status of the replaced item Before IBM or your reseller exchanges a Machine or p...

Page 124: ...im damages from IBM including fun damental breach negligence misrepresentation or other contract or tort claim IBM is liable only for 1 Damages for bodily injury including death and damage to real pro...

Page 125: ...d void the user s authority to operate the equipment This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 this device may not cause harmful interfe...

Page 126: ...ses Ger t ist berechtigt in bereinstimmung mit dem Deutschen EMVG das EG Konformit tszeichen CE zu f hren Verantworlich f r die Konformit tserkl rung nach Paragraph 5 des EMVG ist die IBM Corporation...

Page 127: ...device has been approved for business purpose with regard to electromagnetic interference If you find this is not suitable for your use you may exchange it for a non business pur pose one Information...

Page 128: ...ser may find the following booklet prepared by the Federal Communications Commission helpful How to Identify and Resolve Radio TV Interference Problems This booklet is available from the U S Governmen...

Page 129: ...raffic including voice data and video signals on any User To Network Interface UNI ATM Forum A consortium of organizations representing vendors manufacturers carriers service providers universities re...

Page 130: ...ints source and destination must be set up prior to data transmission ATM and Frame Relay are Connection Oriented E 164 An 8 byte address format In ATM it is typically used in public networks and it i...

Page 131: ...ATM protocols interfaces and devices LE_ARP LAN Emulation Address Resolution Protocol The ARP used in LAN Emulation for binding a requested ATM address to the MAC address LEC LAN Emulation Client Typi...

Page 132: ...ng AAL and EFCI PVC Permanent Virtual Circuit A virtual connection established by network management between two points that is permanently available routing A network management function responsible...

Page 133: ...ystems as some of the additional features UNI 3 1 A corrected version of UNI 3 0 this specification also includes Service Specific Connection Oriented Protocol SSCOP for error detection and correction...

Page 134: ...LAN Trunk A connection which carries traffic for more than one VLAN A port which is part of a VLT connection may be a member of all VLANs VP Virtual Path Describes a set of virtual channels VCs betwe...

Page 135: ...lack Published by Prentice Hall ISBN 0 13 297178 X Standards ATM Forum Integrated Local Management Interface ILMI Specification Version 3 1 or later ATM Forum ATM User Network Interface Specification...

Page 136: ...2 BIBLIOGRAPHY...

Page 137: ...PI field 2 14 ATM Layer 2 14 ATM Module Boot software version number 8 4 Connecting a cable 6 5 Device support 6 3 Features summary 1 2 Hardware version number 8 3 Installing 6 4 Power supply 6 7 Soft...

Page 138: ...LEC 2 3 ATM address 9 6 Last LEC Failure Reason 9 6 LEC Operation at Failure 9 9 LEC State 8 8 9 6 MAC address proxy 2 6 2 7 Mapping to ELAN 9 6 LAN Emulation Configuration Server LECS ATM address 2...

Page 139: ...1 Errored Seconds 9 12 OCD 9 10 Severe Errored Seconds 9 12 Troubleshooting 9 12 Unavailable Seconds 9 12 Receive Bandwidth Used 9 3 Receive Errors 9 4 Sampling period 9 2 9 11 Screen map 9 1 SDH 9 10...

Page 140: ...4 INDEX...

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