Cisco Systems 2600 manual WAN and LAN Interface Numbering

Chapter 1 Overview of Cisco 2600 Series Routers

Interface Numbering

•For information on installing AIMs, refer to the following documents:

–AIM Installation Quick Start Guide: Cisco 2600, 3600, and 3700 Series

–Installing Advanced Integration Modules in Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers

•For information about installing DRAM, SDRAM, NVRAM, and flash memory SIMMs, refer to the following hardware configuration note:

–Upgrading System Memory, Internal Flash Memory, and Root ROM in Cisco 2600 Series Routers

•For information about installing CompactFlash memory cards, refer to the following hardware configuration note:

–Installing and Formatting Cisco 2691, Cisco 3631, and Cisco 3700 Compact Flash Memory Cards

Interface Numbering

Each interface (port) on a Cisco 2610, Cisco 2620, and Cisco 2650 series router is identified by number as described in the following sections.

WAN and LAN Interface Numbering

Cisco 2600 series routers contain the following WAN and LAN interface types:

•Built-in LAN interfaces: Ethernet, FastEthernet, Token Ring

•Two or three slots in which you can install WAN interface cards (WICs)

•One slot in which you can install a network module

The numbering format is interface-typeslot-number/Interface-number. Two examples are:

•Ethernet 0/0

•Serial 1/2

The slot number is 0 for all built-in interfaces and 0 for all WIC interfaces; the slot number is 1 for network module interfaces.

Interface (port) numbers begin at 0 for each interface type, and continue from right to left and (if necessary) from bottom to top.

Figure 1-11shows a router of 1-RU height with:

•A WIC in each WIC slot (containing interface Serial 0/0 in physical slot W0, and interface Serial 0/1 in physical slot W1)

•A 4-serial-port network module in slot 1 (containing the following ports: Serial 1/0, Serial 1/1, Serial 1/2, and Serial 1/3)

•First built-in Ethernet interface—Ethernet 0/0

•Second built-in Ethernet interface—Ethernet 0/1, or optionally in Cisco 2612 and Cisco 2613 routers only: Token Ring interface 0/0

Cisco 2600 Series Routers Hardware Installation Guide