Cisco 2651XM Software Configuration Guide - Page 32

Understanding Interface Numbering Chapter 1 Understanding Interface Numbering and Cisco IOS Software Basics Figure 1-11 Cisco 3745 Rear Panel 1 Interface card slots 2 Network modules 3 Power supply 4 Fast Ethernet 0/0 port 5 Fast Ethernet 0/1 port 6 Cisco 3700 compact Flash slot 7 Auxiliary port 8 Console port 9 Power supply 10 Network modules 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: - 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. 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: • 1/0/0-Chassis slot 1/Voice module slot 0/Voice interface 0 1-12 Software Configuration Guide For Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers OL-1957-04