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The MicroMMAC-T Chassis View
2-28 Managing the Hub
A software reset will now be performed for the MicroMMAC-T. All counters for
the current MicroMMAC-T-managed ring return to their initial values, and the
device will re-insert into the ring.
Enabling and Disabling Port Mapping
Port Mapping enables the MicroMMAC-T to determine if station address
information can be matched to a specific module and port index. This ability is
important during the Automatic Beacon Recovery Process, when the
MicroMMAC-T needs to match address information contained in beacon frames
with physical port locations so it can determine the “fault region” and locate
failing ports.
When Port Mapping is enabled, the MicroMMAC-T can determine if a port is
physically linked to the hub without being mapped as part of the ring network —
that is, the device does not participate in neighbor notification. If a port in this
condition is detected, the MicroMMAC-T will physically shut down the port to
prevent ring problems. Port Mapping is enabled by default.
However, you may want to attach a device to the hub — such as a ring analyzer
— that does not participate in the normal operation of token ring protocol. In this
case, you will want to disable Port Mapping for the port to which that device will
be attached, to ensure that the MicroMMAC-T does not shut the port down.
The Port Map window (Figure 2-15) allows you to view the current state of port
mapping for the selected port, and allows you to either enable or disable port
mapping for the port.
To enable or disable port mapping for a selected port:
1. Click on the desired Port index on a module display in the Chassis View
window. The Port pull-down menu will appear.
2. Click on Port Map.... The Port Map window, Figure 2-15, will appear.
!
CAUTION
If you wish to insert an analyzer on a ring, be sure you disable Port Mapping on the port
you use for insertion; if you don’t, the MicroMMAC-T will detect that a station which is
not participating in neighbor notification has been inserted, and will shut down the port.
Also, be sure you do not insert anything other than an analyzer into a port whose
mapping function has been disabled, since the MicroMMAC-T will not recognize the link
status of that port, and will therefore not be able to map ports correctly (since it detects
more stations than linked ports).
- MicroMMAC-T User's Guide 1
- Virus Disclaimer 3
- Restricted Rights Notice 5
- Chapter 4 Token Ring Alarms 9
- Contents 10
- Introduction 11
- Using This Guide 12
- Software Conventions 13
- Related Manuals 13
- 1-4 Software Conventions 14
- Left Mouse Button 14
- Right Mouse Button 14
- Using Window Buttons 15
- Getting Help 17
- 1-8 Getting Help 18
- The MicroMMAC-T Chassis View 19
- Viewing Chassis Information 20
- Front Panel Information 21
- Menu Structure 22
- Port Status Displays 27
- The Chassis Manager Window 30
- Viewing Hardware Types 30
- Managing the Hub 31
- 2-14 Managing the Hub 32
- Managing the Hub 2-15 33
- 2-16 Managing the Hub 34
- Managing the Hub 2-17 35
- Viewing Network Information 36
- Managing the Hub 2-19 37
- Viewing Module Status 38
- Viewing Ring Port Status 39
- 2-22 Managing the Hub 40
- Managing the Hub 2-23 41
- 2-24 Managing the Hub 42
- Managing the Hub 2-25 43
- 2-26 Managing the Hub 44
- Resetting the Device 45
- 2-28 Managing the Hub 46
- Managing the Hub 2-29 47
- 2-30 Managing the Hub 48
- Enabling and Disabling Ports 49
- Token Ring Statistics 57
- Network Level Statistics 60
- Network Level Statistics 3-5 61
- 3-6 Network Level Statistics 62
- Network Level Statistics 3-7 63
- 3-8 Network Level Statistics 64
- Network Timer Statistics 65
- Network Performance Graphs 66
- Network Level Statistics 3-11 67
- The Frame Size Window 68
- Network Level Statistics 3-13 69
- 3-14 Network Level Statistics 70
- Management Station Statistics 71
- Port Level Statistics 75
- 3-20 Port Level Statistics 76
- Port Level Statistics 3-21 77
- 3-22 Port Level Statistics 78
- Port Performance Graphs 79
- 3-24 Port Level Statistics 80
- Port Level Statistics 3-25 81
- 3-26 Port Level Statistics 82
- Token Ring Alarms 83
- 4-2 Ring-Level Alarm Limits 84
- Ring-Level Station Alarms 85
- 4-4 Ring-Level Alarm Limits 86
- Station-Level Alarm Limits 87
- The Station List Window 91
- Station List Window Fields 92
- Viewing Station Statistics 93
- Setting Station Alarms 94
- Printing the Station List 95
- The Station Map 96
- Station Map Window Fields 97
- Viewing the Station Map 98
- Station Pop-up Text Boxes 98
- The Station Map 5-9 99
- The Station Command Menu 100
- Manipulating the Station Map 101
- The Station Map 5-13 103
- 5-14 The Station Map 104
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