
vi 114078 Rev. A
Ethernet Topologies ...........................................................................................2-4
FDDI Overview .........................................................................................................2-5
The FDDI Standard ...........................................................................................2-6
FDDI Dual Counter-Rotating Ring Architecture .................................................2-7
FDDI Ring Operation .........................................................................................2-8
FDDI Ring Maintenance ..................................................................................2-10
FDDI SMT ........................................................................................................2-10
FDDI Hardware ................................................................................................2-13
Token Ring Overview .............................................................................................2-13
Token Ring Topology .......................................................................................2-13
Data Flow and Media Access Control ..............................................................2-14
Overview of WAN Protocols .........................................................................................2-15
E1 Overview ...........................................................................................................2-15
HSSI Overview .......................................................................................................2-16
ISDN Overview .......................................................................................................2-16
Link Access Procedure Balanced (LAPB) Protocol Overview ................................2-17
MCE1 and MCT1 Overview ...................................................................................2-17
Synchronous Overview ..........................................................................................2-18
T1 Overview ...........................................................................................................2-18
Frame Formats ................................................................................................2-19
Bipolar Format .................................................................................................2-20
DSU/CSU ........................................................................................................2-22
Chapter 3
Customizing LAN Interfaces
Editing CSMA/CD Lines .................................................................................................3-1
Enabling or Disabling an Ethernet Interface .............................................................3-2
Enabling or Disabling Breath of Life Messages ........................................................3-2
Setting the BofL Interval ...........................................................................................3-2
Enabling or Disabling Hardware Filtering .................................................................3-3
Setting the 100-Mb/s Interface Line Speed ..............................................................3-3
Automatic Line Negotiation ................................................................................3-3
Full-Duplex Congestion Control .........................................................................3-4
Configuring the CSMA/CD Automatic Negotiation Protocol .....................................3-4
Selecting Line Advertising Capabilities ..............................................................3-5
Viewing Line Negotiation Status ........................................................................3-6
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