32 VIP-FE-TX/4E Installation and Configuration
VIP Port Adapter Functions
Table 1 lists the cabling specifications for 100-Mbps Fast Ethernet transmission over UTP and STP
cables. Table 2 summarizes IEEE 802.3u 100BASE-T physical characteristics.
Table 1
Specifications and Connection Limits for 100-Mbps 100BASE-T Transmission
Table 2
IEEE 802.3u Physical Characteristics
FE-TX Port Adapter LEDs
The FE-TX port adapter contains the enabled LED, standard on all port adapters, and a bank of three
status LEDs for the ports. After system initialization, the enabled LED goes on to indicate that the
FE-TX port adapter has been enabled for operation. (The LEDs are shown in Figure 15.) The
following conditions must be met before the enabled LED goes on:
•
The FE-TX interface is correctly connected to the backplane and receiving power.
•
The FE-TX-equipped VIP contains a valid microcode version that has been downloaded
successfully.
•
The bus recognizes the FE-TX-equipped VIP.
If any of these conditions is not met, or if the initialization fails for other reasons, the enabled LED
does not go on.
Parameter
RJ-45
MII
Cable specification
Category 5
1
UTP
2
, 22 to 24 AWG
3
1. EIA/TIA-568 or EIA-TIA-568 TSB-36 compliant.
2. Cisco Systems does not supply Category 5 UTP RJ-45 or 150-ohm STP MII cables. Both are available commercially.
3. AWG = American Wire Gauge. This gauge is specified by the EIA/TIA-568 standard.
Category 3, 4, or 5, 150-ohm UTP or STP, or multimode optical fiber
Maximum cable length
–
0.5 m (1.64 ft.) (MII-to-MII cable
4
)
4. This is the cable between the MII port on the FE-TX port adapter and the appropriate transceiver.
Maximum segment length
100 m (328 ft.) for 100BASE-TX
1 m (3.28 ft.)
5
or 400 m (1,312 ft.) for 100BASE-FX
5. This length is specifically between any two stations on a repeated segment.
Maximum network length
200 m (656 ft)
5.
(with 1 repeater)
–
Parameter
100BASE-T
Data rate (Mbps)
100
Signaling method
Baseband
Maximum segment length (meters)
100 m between DTE
1
and repeaters
1. DTE = data terminal equipment.
Media
RJ-45: Category 5 UTP
MII: Category 3, 4, or 5, 150-ohm UTP or STP, with appropriate transceiver
Topology
Star/Hub
