Frame Sizes, Isolating Errors, AC Error | Cabletron Systems TRMMIM

Statistics

LanNet Manager	IBM’s Token Ring LAN Network Manager.
Other	All other protocols not described above.

Frame Sizes

Frame Sizes are only available for Ring Pie Charts and Meters. Frame Sizes displays the number of packets counted on the ring of the following sizes:

•Up to 63 bytes

•64 to 127

•128 to 255

•256 to 511

•512 to 1023

•1024 to 2047

•2048 to 4095

•4096 and up

Isolating Errors

Isolating errors report the region of a fault, therefore pointing out where on the ring the problem is occurring. Isolating errors include line, internal, burst, A/C, and abort errors, described below.

Line Errors

A line error occurs when there is a coding violation in the data part of the frame. A power surge on the ring may cause the data portion of a frame or token to be corrupted. It is the equivalent to an Ethernet CRC error in both cause (usually electronic noise along the ring medium or other cable problems) and effect. These errors are counted, but initiate no other recovery procedures.

Burst Error

A burst error occurs when ﬁve half-bits of Manchester-encoded data are received by a station without a phase change (a signal transition from 0 to 1 or from 1 to 0); this typically indicates a clocking error. Usually, burst errors occur when there was a brief electrical surge or electronic noise on the network. This error is normal when stations enter or leave the ring without phantom current; however, it can also indicate a problem with the receiver on the reporting node, the transmitter on its NAUN, or the cabling or hub hardware between them. Burst errors will cause the active monitor to initiate the ring purge process, and may cause frames to be lost on the ring.

AC Error

AC errors indicate that the reporting station’s NAUN is faulty, because it is unable to report its address.

Ring and Station Variables

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Cabletron Systems TRMMIM manual Frame Sizes, Isolating Errors, Line Errors, Burst Error, AC Error

Contents

Trmmim Page Virus Disclaimer Applicable to licenses to the United States Government only Restricted Rights Notice Contents Chapter Alarm Conﬁguration Chapter Ring MapChapter Statistics Appendix a Trmmim MIB Structure Chapter Ring Security Conﬁguration Contents Trmmim Using the Trmmim User’s Guide Introduction to Spma for the Trmmim What’s not in the Trmmim Guide Screen Displays Conventions Introduction to Spma for the Trmmim Button Using the Mouse FTP Getting Help Trmmim Firmware Introduction to Spma for the Trmmim Trmmim Firmware Using the Hub View Using the Trmmim Hub View Navigating Through the Hub View Using the Trmmim Hub View Trmmim Hub View Hub View Front Panel Device Location UptimeTime and Date Device Name Using the Trmmim Hub View Using the Mouse in a Hub View Module Module Index FNB Bypass State Port Display Form Hub View Port Color Codes Port Type ErrorsFrames Total Bytes FNB Display Monitoring Hub Performance Using the Trmmim Hub View Name and Location Checking Device Status and Updating Front Panel Info Total Rings Checking Module StatusContact Date and Time Module Speed FaultSpeed Fault Location Module Name Module/Port Admin StateChecking Port Status Port Name Checking Station Status Link State TimeInsertion Trap Station Name VendorUpstream Neighbor/Downstream Neighbor Reverse MACs Physical LocationPriority Port Mapping Conﬁguring Station Name, Location, or Priority Checking Ring Port Status Media Type Fault State TimeMedia Fault Class Checking Statistics Abort BytesLine Burst Managing the Hub Managing the Hub at the Device LevelFind MAC Address 12. The Find MAC Address Window Setting the Polling Intervals Contact Status 13. Trmmim Polling Intervals Statistics Device General StatusDevice Conﬁguration Port Operational State Controlling Token Ring FNB Multiplexer Connections Managing the Hub at the Module Level INS Bypass BoardLeft Connect Right Connect Clearing the Module FNB Conﬁguration Window Selections Controlling Token Ring Speed Management MGT Controlling Token Ring MIM Management ModeEnabling All Ports on Token Ring Modules Auto AUT Managing the Hub at the Port Level Converting a Station Port to a Ring-out PortEnabling and Disabling Station and Ring Ports Removing a Station from the Ring Ring Map From the Hub View From the command line stand-alone modeLaunching the Ring Map From the icon Ring Name Selecting a Ring to Map Ring Map Utilization SpeedStations Name Quick Info Popup Window Viewing Station-speciﬁc Information Drop Board and Port Performance and Errors Setting a Station Name Viewing Management Station Conﬁguration Setting a Station Drop Commands Open Status Error Status Active Monitor Error Setting the Statistics Calculation Mode Error Report TimerViewing Ring-level Information Set Calculation Mode Window Viewing the Error Table Error Table Window Isolating Errors Total Errors Non-Isolating Errors Changing the Station Labels Viewing Device Information Device Information Window Setting the Map Poll Interval Beacon Events Viewing Beacon HistoryActive Monitor Changes Ring Purges Last Beacon Type Longest BeaconLast Beacon Beacon Conﬁguration 12. The Beacon Conﬁguration Window Using the Find Options 13. Sample Find Windows Searching by Station Name, MAC Address, Board/Port, or Drop Finding the Active Monitor on the Network Finding the Management Station on the Network Frames or Errors measured/Δ Time in seconds 14. Sample Find Highest and Lowest Windows Accessing Other Spma Applications Alarm Conﬁguration Spmarun e5alarms IP address community name Setting and Viewing Ring Alarms Alarm Conﬁguration Setting a Ring Level Alarm Setting and Viewing Station Alarms Alarm Conﬁguration Alarm Conﬁguration Alarm Conﬁguration Setting a Station Level Alarm Alarm Conﬁguration Setting and Viewing Station Alarms Statistics Using Statistics Spmarun e5stats IP Address community name Viewing the Ring Station List Downstream Addr Module and PortStn Name Upstream Addr Using the Reverse MAC Button Monitoring Ring and Station StatisticsRefreshing the Station List Creating a Pie Chart Creating a Graph or Meter Click mouse button 1 on KBytes Ring and Station VariablesGeneral Protocols AC Error Isolating ErrorsLine Errors Burst Error Non-Isolating Errors Abort ErrorInternal Error Frequency Errors Token Errors Statistics Ring and Station Variables About Ring Security Ring Security Conﬁguration Ring Security Conﬁguration Launching the Security Conﬁguration Window Security Conﬁguration Ring Selection window, -1, will appear Disallowed Count Allowed Station ListAllowed Count Disallowed Station List Security Mode Options Disable SecurityEnable Security Allowed/Disallowed List Conﬁguration Buttons Building the Allowed List Automatically Conﬁguring Security Station Addition Window Deleting Stations from the Allowed or Disallowed Lists Clear List Window Clearing All Entries in the Allowed or Disallowed List Remove Changing the Ring Security Mode Trmmim MIB Structure Ietf MIB Support Network One, Network Two Chassis MGRProtocol Stack Snmp Agent Telnet Brief Word About MIB Components and Community Names Trmmim MIB Structure Index Index-2 Index-3 Index-4