Specifications

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Cisco 7100 Series VPN Router Installation and Configuration Guide
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Chapter 3 Installing a Cisco 7100 VPN Series Router
Connecting to the Network
Connecting the Fast Ethernet Ports
The 10BaseT/100BaseTX Fast Ethernet ports support IEEE 802.3 and IEEE 802.3u specifications for
10-Mbps and 100-Mbps transmission over unshielded twisted-pair (UTP) cables. These ports also
support autosensing and autonegotiation of the proper transmission mode (half duplex or full duplex)
with an attached device.
Each Fast Ethernet port has an RJ-45 connector that supports standard straight-through and crossover
Category 3 or Category 5 UTP cable. Cisco Systems does not supply Category 3 or Category 5 UTP
RJ-45 cables; these cables are available commercially.
Use Category 3 UTP crossover cables when connecting a 10BaseT port to a hub or use Category 3 UTP
straight-through cables when connecting to an end station.
Use Category 5 UTP crossover cables when connecting 100BaseTX to a hub or use Category 5 UTP
straight-through cables when connecting to an end station.
To connect the Fast Ethernet port to an Ethernet hub, use the following procedure:
Step 1 Attach the appropriate cable directly to the receptacle on the router. (See Figure 3-9.)
Step 2 Attach the network end of the cable to an Ethernet hub or end station.
Figure 3-9 Connecting the LAN Port to an Ethernet Hub
Note For more information, see the “Fast Ethernet Port Cables and Pinouts” section on page C-4.
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Ethernet hub
Cisco 7100 series router
Crossover
Ethernet cable
22068
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10BaseT/100BaseTX ports
Fast Ethernet 0/0
(RJ-45)
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