Cisco 3725 Router Slot Numbering - Cisco 2611XM Software Configuration Manual

Understanding Interface Numbering

Cisco 3725 Router Slot Numbering

The numbering format is Interface-type Slot-number/Interface-number. Two examples are:
FastEthernet 0/0
Serial 1/2.
The slot numbers are as follows:
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•
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Interface (port) numbers begin at 0 for each interface type, and continue from right to left and (if
necessary) from bottom to top.
Figure 1-10
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•
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Figure 1-10 Cisco 3725 Router Rear View
Software Configuration Guide For Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
1-10
0 for all built-in interfaces
0 for all WIC interfaces
1 for interfaces in the single-width network module slot
2 for interfaces in the double-width network module slot
below shows an example of interface numbering on a Cisco 3725 router with:
A WIC in each WIC slot (containing interfaces Serial 0/0 and Serial 0/1 in physical slot W0,
interface Serial 0/2 in physical slot W1, and interface BRI 0/0 in physical slot W2)
A 2-port T1 network module in slot 1 (containing the following ports: T1 1/0 and T1 1/1)
A 36-port Etherswitch network module in slot 2 (containing the following ports: FastEthernet 2/0
through 2/35, and GigabitEthernet 2/0 and 2/1)
Two built-in Ethernet 10/100 interfaces—FastEthernet 0/0 and FastEthernet 0/1
Gigabit Ethernet 2/1
Fast Ethernet 2/35
Fast Ethernet 2/17
2
NM -H DV
BA NK 4
BA NK 3
BA NK 2
1 BA NK 1
BA NK 0
V0
EN
TI 1/1 TI 1/0
Fast Ethernet 0/1
Fast Ethernet 0/0
Chapter 1 Understanding Interface Numbering and Cisco IOS Software Basics
Fast Ethernet 2/18
Fast Ethernet 2/0
Gigabit Ethernet 2/0
SEE MAN
UAL BEF DSU
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TAL LAT ION
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SEE MAN
UAL BEF
ORE INS DSU
TAL LAT ION 56K
SEE MAN
UAL BEF
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TAL LAT ION
BRI 0/0
Compact
Serial 0/2
Flash slot
Serial 0/1
Serial 0/0
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