Cisco 2620 Configuration Manual page 32

Understanding Interface Numbering
Figure 1-11 Cisco 3745 Rear Panel
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2
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Note
The slot number for all WIC interfaces is always 0. (The W0, W1, and W2 slot designations are for
physical slot identification only.) Interfaces in the WICs are numbered from right to left, starting with
0/0 for each interface type, regardless of which physical slot the WICs are installed in. Some examples
are:
Cisco 3700 Series Routers Voice Interface Numbering
Voice interfaces in Cisco 3725 and Cisco 3745 routers are numbered differently from the WAN
interfaces described in the previous section Voice interfaces are numbered as follows:
chassis slot/voice module slot/voice interface
If a 4-channel voice network module is installed in chassis slot 1, the voice interfaces are:
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Software Configuration Guide For Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
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Interface card slots
Network modules
Power supply
Fast Ethernet 0/0 port
Fast Ethernet 0/1 port
–
If physical slot W0 is empty and physical slot W1 contains a 1-port serial WIC, the interface in
the WIC is numbered Serial 0/0.
–
If slot W0 contains a 2-port serial WIC and slot W1 contains a 1-port serial WIC, the interfaces
in physical slot W0 are numbered Serial 0/0 and Serial 0/1, and the interface in physical slot W1
is numbered Serial 0/2.
–
If slot W0 contains a 2-port serial WIC and slot W1 contains a 1-port BRI WIC, the interfaces
in physical slot W0 are numbered Serial 0/0 and Serial 0/1, and the interface in physical slot W1
is numbered BRI 0/0.
1/0/0—Chassis slot 1/Voice module slot 0/Voice interface 0
Chapter 1 Understanding Interface Numbering and Cisco IOS Software Basics
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Cisco 3700 compact Flash slot
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Auxiliary port
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Console port
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Power supply
10 Network modules
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