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Cisco 3200 Series Router Hardware Reference
OL-5816-10
Chapter 4 Fast Ethernet Switch Mobile Interface Card
The Fast-Ethernet ports on the 4-port FESMIC and the 2-port FESMIC are Fast Ethernet switch ports.
The switch ports support all Layer 2 features. The Fast-Ethernet 0/0 port on the Cisco 3270 Rugged
Router card and MARC is a Fast Ethernet router port. The routing features supported on the MARC
cannot be configured on the FESMIC ports.
FESMIC Rotary Switch Positions
A Cisco router identifies a Fast Ethernet interface address by its slot number and port number, in the
form of slot/port. The slot/port addresses of the Fast Ethernet interfaces on the FESMIC depend on the
position of the rotary switch.
For example, if the rotary switch on the 4-port FESMIC is in position 0, then the ports are identified as
1/0, 1/1, 1/2, and 1/3. If the rotary switch on the 2-port FESMIC is in position 0, the ports are identified
as 1/0 and 1/1.
Table 4-2 shows the mapping of the switch positions to the Cisco IOS slot numbers.
Caution The rotary switch positions must be unique and should not be assigned to more than one MIC.
• If a MIC rotary switch is set to 3 or higher, the message is:
“MIC-3-SLOTNOTSUPPORTED: The MIC cannot operate when the rotary switch is in position 3.
Change the switch position to one of the supported, unused positions 0-2.”
• If two or more MICs have the rotary switches set to the same position, or if one or more MICs are
in rotary switch positions 4 through 7, the router might crash after displaying the following error
message:
“Non-recoverable error occurred. Please check the rotary switch positions on the MIC cards for the
possible misconfiguration of the switch position.”
Table 4-3 shows the FESMIC Fast Ethernet signal assignments. The position of the rotary switch
determines the port assignments. Although the rotary switch has eight positions, only one of three
positions can be selected. The rotary switch position should be unique for each MIC.
Tab l e 4-2 FESMIC Rotary Switch Positions
Switch Position Cisco IOS Slot Number
0 1
1 2
2 3
3–7 Not supported
Tab l e 4-3 FESMIC Rotary Switch Positions and Signal Assignments
Rotary Switch Position MIC Slot Fast Ethernet Signal Assignments
0 1 FE 1/0 FE 1/1 FE 1/21
1. For 4-port FESMIC only.
FE 1/31
1 2 FE 2/0 FE 2/1 FE 2/21FE 2/31
2 3 FE 3/0 FE 3/1 FE 3/21FE 3/31