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Cisco 1120 Connected Grid Router Hardware Installation Guide
OL-26438-02
Chapter 3 Router Hardware Description
Hardware Features
Combo Ports
The two
Gigabit Ethernet (GE) Ports
and the two
Small Form-Factor Pluggable (SFP) Ports
are labeled
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.
•
GE ports:
Copper GE connections
•
SFP modules:
Fiber optic GE connections
These ports automatically detect the type of any connected cable (fiber or copper) and then switch to the
corresponding mode (fiber or copper).
Note
If connections are made to both interfaces of the same name (ETH 2/1 or ETH 2/2), the first connection
that establishes a link is the only connection enabled.
Figure 3-6
GE Ports and SFP Ports Share Interfaces ETH 2/1 and ETH 2/2
Serial Ports
See
Figure 3-5
for serial port locations.
The router has two serial ports that support the following modes (selected with system software
commands):
•
RS232
•
RS485
Items
Description
Gigabit Ethernet Connection Type
1
SFP module ports
Fiber optic
2
Gigabit Ethernet ports
Copper
1
2
302207
