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Configuring the Stack
4-27
What is the Switch Database?
The Switch Database is used by the stack to determine if a packet
should be forwarded, and which port should forward the packet if it is
to be forwarded. The database contains a list of entries, each
containing two items:
■
The MAC (Ethernet) address information from each endstation that
sends packets to the stack.
■
The port in the stack that receives packets from that endstation.
The number of addresses that the database can hold depends on the
number of Switch units in the stack. Each Model F12/F24 provides
support for 12,000 addresses, and each Model E12/E24 provides
support for 6,000 addresses.
Databases entries can have two states:
■
Learned
— The stack has placed the entry into the Switch Database
when a packet was received. Learned entries are removed (aged
out) from the Switch Database if the stack does not receive packets
from that endstation for 30 minutes. This prevents the Switch
Database from becoming full with obsolete entries by ensuring that
when an endstation is removed from the network, its entry is also
removed from the database. Learned entries are also removed from
the Switch Database if the Switch that submitted the entry is reset
or powered-down.
■
Permanent
— The entry has been placed into the Switch Database
using the Switch Database page. Permanent Entries are not removed
from the Switch Database unless they are deleted using the Switch
Database page.
Displaying the Switch Database
The Display Database Entries table of the Switch Database page
displays the Switch Database entries for the stack:
■
Unit
1 / 2 / 3 / 4
Displays the Switch unit in the stack that contains the port for the
entry.
■
Port
Displays the port for the entry.
F24user.bk Page 27 Wednesday, July 15, 1998 4:27 PM
Summary of Contents for 8271 Nways Ethernet LAN Switch
Page 10: ...viii F24user bk Page viii Wednesday July 15 1998 4 27 PM...
Page 14: ...4 SAFETY NOTICES F24user bk Page 4 Wednesday July 15 1998 4 27 PM...
Page 15: ...Safety Notices 5 F24user bk Page 5 Wednesday July 15 1998 4 27 PM...
Page 16: ...6 SAFETY NOTICES F24user bk Page 6 Wednesday July 15 1998 4 27 PM...
Page 20: ...10 ABOUT THIS GUIDE F24user bk Page 10 Wednesday July 15 1998 4 27 PM...
Page 22: ...F24user bk Page 2 Wednesday July 15 1998 4 27 PM...
Page 38: ...1 16 CHAPTER 1 INTRODUCING THE SWITCH F24user bk Page 16 Wednesday July 15 1998 4 27 PM...
Page 58: ...3 10 CHAPTER 3 SETTING UP FOR MANAGEMENT F24user bk Page 10 Wednesday July 15 1998 4 27 PM...
Page 60: ...F24user bk Page 2 Wednesday July 15 1998 4 27 PM...
Page 122: ...F24user bk Page 2 Wednesday July 15 1998 4 27 PM...
Page 139: ...IV PROBLEM SOLVING Chapter 8 Problem Solving F24user bk Page 9 Wednesday July 15 1998 4 27 PM...
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Page 150: ...8 10 CHAPTER 8 PROBLEM SOLVING F24user bk Page 10 Wednesday July 15 1998 4 27 PM...
Page 152: ...F24user bk Page 2 Wednesday July 15 1998 4 27 PM...
Page 157: ...Important Safety Information A 5 F24user bk Page 5 Wednesday July 15 1998 4 27 PM...
Page 173: ...Important Safety Information A 21 F24user bk Page 21 Wednesday July 15 1998 4 27 PM...
Page 174: ...A 22 APPENDIX A SAFETY INFORMATION F24user bk Page 22 Wednesday July 15 1998 4 27 PM...
Page 184: ...D 4 APPENDIX D PIN OUTS F24user bk Page 4 Wednesday July 15 1998 4 27 PM...
Page 188: ...F 2 APPENDIX F TECHNICAL SUPPORT AND SERVICE F24user bk Page 2 Wednesday July 15 1998 4 27 PM...
Page 210: ...6 INDEX F24user bk Page 6 Wednesday July 15 1998 4 27 PM...