Cisco WS-CAC-4000W-US= 用户手册

Crossover  Crossover  Straight 

Straight 

Crossover  Crossover  Straight 

Straight 

Straight 

Straight 

Crossover Crossover 

Straight 

Straight 

Crossover Crossover 

Note: The ports on Catalyst switches that run Cisco IOS

®

 Software (Native) can be configured to act as 

Layer 2 (L2) or Layer 3 (L3) ports. When you connect the RJ-45 cable from a Layer 3 port, which acts as a 
router port, to other devices, use the previous table. In summary, the cables used do not change, regardless 
of whether the port is configured to be in Layer 2 (switch port) or Layer 3 (router port) mode. 

These diagrams show some of the most common cable types and connectors used on Catalyst switches. 

 

 

This is used in order to connect 
to 10/100 or 10/100/1000 
Ethernet ports and 1000Base-T 
Gigabit Interface Converter 
(GBIC) or small form factor 
pluggable (SFP) GBIC ports. 
10/100/1000 Ethernet ports 
must use four twisted-pair 
Category 5, 5e or 6 cables. 

This is used in order to 
connect to 10/100BASE-TX 
RJ-21 telco interfaces. Use 
Category 5 UTP cables with 
male RJ-21. 

 

 

This is used in order to 
connect to 100Base-FX fiber-
optic ports. Use multimode 
fiber (MMF) cables with MT-

This is used in order to connect 
to 100Base-FX, 1000Base-SX, 
Long Wavelength/Long Haul 
(LX/LH) and ZX fiber-optic