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6
B
ASIC
 C
ONFIGURATION
 
OF
 P
ORTS
 
AND
 P
ATHS
This chapter contains conceptual information about ports and paths and 
contains basic configuation procedures for each of the interfaces on your 
SuperStack II NETBuilder SI bridge/router.
Paths, Ports, and 
Virtual Ports
Ports and paths are the fundamental interface units on the bridge/router, 
and understanding the concept of ports and paths is important. This 
section defines ports and paths and explains how they are numbered.
The fundamental difference between paths and ports is that the path is 
the physical interface and the port is the logical interface in the software 
that is mapped to the physical path. Figure 6 illustrates the relationship 
between paths and ports.
Figure 6   Relationship Between Physical Paths and Logical Ports
Paths and Ports
path is the physical interface that connects a bridge/router to a physical 
network medium such as Ethernet or a serial line. Each path is associated 
with a connector. If you have a built-in ISDN connector, each B channel is 
assigned a separate path, for instance 3.1 and 3.2.
Physical path
!<path>
Physical path
!<path>
Logical port
!<port>
Logical port
!<port>
Physical connectors
NETBuilder bridge/router chassis