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Chapter 3
Router Hardware Description
Combo Ports
The two
identically (ETH 2/1 and ETH 2/2) because the SFP and GE interfaces share physical ports on the router.
Only one instance of each interface (ETH 2/1 and ETH 2/2) can be in use at any time.
•
•
These ports automatically detect the type of any connected cable (fiber or copper) and then switch to the
corresponding mode (fiber or copper).
If connections are made to both interfaces of the same name (ETH 2/1 or ETH 2/2), the first connection
Note
that establishes a link is the only connection enabled.
Figure 3-6
Items
1
2
Serial Ports
See
The router has two serial ports that support the following modes (selected with system software
commands):
•
•
OL-26438-02
Gigabit Ethernet (GE) Ports
GE ports: Copper GE connections
SFP modules: Fiber optic GE connections
GE Ports and SFP Ports Share Interfaces ETH 2/1 and ETH 2/2
1
Description
SFP module ports
Gigabit Ethernet ports
Figure 3-5
for serial port locations.
RS232
RS485
and the two
Small Form-Factor Pluggable (SFP) Ports
2
Gigabit Ethernet Connection Type
Fiber optic
Copper
Cisco 1120 Connected Grid Router Hardware Installation Guide
Hardware Features
are labeled
3-15
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