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5-7
Cisco Network Modules Hardware Installation Guide
OL-2485-20
Chapter 5 Connecting Serial Network Modules
Asynchronous Network Module Interface Numbering
32-port asynchronous module, or some other type of module—or even whether there is a network
module in slot 0 at all. If you move the module in slot 1 to a different slot, however, its interface numbers
change.
Note
The Cisco MWR 1941-DC router has one network module slot (slot 1).
Table 5-4
shows the range of interface numbers available for each type of asynchronous network module
in each Cisco 3600 series router slot. (Interface 0 is automatically assigned to the console.)
Cisco 2600 Series and Cisco MWR 1941-DC Router Serial Interface Numbering
Interface numbering for Cisco 2600 series and Cisco MWR 1941-DC routers differ from Cisco 3600
series interface numbering in the following ways:
•
WAN interface card slot numbers always appear as slot 0, even if the interface card is installed in
the slot labeled W1.
•
WAN interface cards are numbered dynamically, starting with the first card installed. For example:
–
If slot W0 is empty and slot W1 contains a 1-port serial WAN interface card, the interface
number is serial 0/0.
–
If slot W0 contains a 2-port serial WAN interface card and slot W1 contains a 1-port serial
interface card, serial 0/0 and 0/1 reside in slot W0 and serial 0/2 resides in slot W1.
Table 5-4
Cisco 3600 Series 16- and 32-Port Asynchronous
Network Module Interface Numbering
Slot Number
Interface Numbers
(16-Port Module)
Interface Numbers
(32-Port Module)
0
1–16
1–32
1
33–48
33–64
2
65–80
65–96
3
97–112
97–128
4
129–144
129–160
5
161–176
161–192
6
193–208
193–224