Table Of Contents
Quick Start Guide
Cisco 2691 Modular Routers
INCLUDING LICENSE AND WARRANTY
1 Cisco 90-Day Limited Hardware Warranty Terms
There are special terms applicable to your hardware warranty and various services that you can use during the warranty period. Your formal Warranty Statement, including the warranties and license agreements applicable to Cisco software, is available on Cisco.com. Follow these steps to access and download the Cisco Information Packet and your warranty and license agreements from Cisco.com.
1. Launch your browser, and go to this URL:
The Warranties and License Agreements page appears.
2. To read the Cisco Information Packet, follow these steps:
a. Click the Information Packet Number field, and make sure that the part number 78-5235-03A0 is highlighted.
b. Select the language in which you would like to read the document.
c. Click Go. The Cisco Limited Warranty and Software License page from the Information Packet appears.
d. Read the document online, or click the PDF icon to download and print the document in Adobe Portable Document Format (PDF).
3. To read translated and localized warranty information about your product, follow these steps:
a. Enter this part number in the Warranty Document Number field: 78-5236-01C0
b. Select the language in which you would like to read the document.
c. Click Go. The Cisco warranty page appears.
d. Review the document online, or click the PDF icon to download and print the document in Adobe Portable Document Format (PDF).
You can also contact the Cisco service and support website for assistance:
Duration of Hardware Warranty
Ninety (90) days.
Replacement, Repair, or Refund Policy for Hardware
Cisco or its service center will use commercially reasonable efforts to ship a replacement part within ten (10) working days after receipt of a Return Materials Authorization (RMA) request. Actual delivery times can vary, depending on the customer location.
Cisco reserves the right to refund the purchase price as its exclusive warranty remedy.
To Receive a Return Materials Authorization (RMA) Number
Contact the company from whom you purchased the product. If you purchased the product directly from Cisco, contact your Cisco Sales and Service Representative.
Complete the information below, and keep it for reference:
Company product purchased from
Company telephone number
Product model number
Product serial number
Maintenance contract number
2 Documents, Equipment, and Tools
All the documents referenced in this quick start guide are available online on Cisco.com. To be sure of obtaining the latest information, you should access the online documentation.
To view or print a document in its original page format, access the online document, and click the PDF icon.
For information about accessing user documentation, see the "Where to Go Next" section.
Items Included with Cisco 2691 Routers
•Rack-mount brackets with screws for 19-inch rack
•Ground lug; power cord
•RJ-45-to-DB-9 adapter cable for console connection
•RJ-45-to-DB-25 adapter cable for modem connection
•Ethernet cable for LAN interface
•Cisco Information Packet
•Cisco 90 Day Limited Hardware Warranty Terms
•Cisco Security Device Manager (SDM) Quick Start Guide document (if VPN bundle is installed on your router)
•Cisco 2691 Modular Routers Quick Start Guide (this document)
Items Not Included
Individual items in this list may be required for your particular application:
•Four screws for installing the chassis in a rack
•PC running terminal emulation software for administrative access, or modem for remote administrative access
•Cables for WAN interfaces, voice interfaces, or additional LAN interfaces
•Number 2 Phillips screwdriver
3 Install Chassis
For safety information you need to know before working on your Cisco router, refer to the Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Regulatory Compliance and Safety Information document that accompanied this device.
Note To see translations of the warnings that appear in this publication, refer to the Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Regulatory Compliance and Safety Information document.
Warning This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security. Statement 1017
Warning Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals. Statement 43
Warning This equipment has been designed for connection to TN and IT power systems. Statement 1007
Warning To avoid electric shock, do not connect safety extra-low voltage (SELV) circuits to telephone-network voltage (TNV) circuits. LAN ports contain SELV circuits, and WAN ports contain TNV circuits. Some LAN and WAN ports both use RJ-45 connectors. Use caution when connecting cables. Statement 1021
Warning This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available. Statement 1024
Warning Blank faceplates and cover panels serve three important functions: they prevent exposure to hazardous voltages and currents inside the chassis; they contain electromagnetic interference (EMI) that might disrupt other equipment; and they direct the flow of cooling air through the chassis. Do not operate the system unless all cards, faceplates, front covers, and rear covers are in place. Statement 1029
Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030
Warning To prevent personal injury or damage to the chassis, never attempt to lift or tilt the chassis using the handles on modules (such as power supplies, fans, or cards); these types of handles are not designed to support the weight of the unit. Statement 1032
Warning Ultimate disposal of this product should be handled according to all national laws and regulations. Statement 1040
Installing the Chassis
You can set the chassis on a desktop or install it in a rack. See the applicable instructions in the following sections:
Note Cisco 2691 routers are not designed for wall-mounting.
Caution To prevent damage to the chassis, never attempt to lift or tilt the chassis by the plastic panel on the front. Always hold the chassis by the metal body.
Rack-Mounting the Chassis
Cisco 2691 routers can be installed in 19- or 23-inch racks with the following chassis orientations:
•Center mounting—Brackets attached in the center of the chassis with either front panel or rear panel facing forward
•Front mounting—Brackets attached at the front of the chassis with the front panel facing forward
•Rear mounting—Brackets attached at the rear of the chassis with the rear panel facing forward
The brackets for Cisco 2691 routers are shown in Figure 1.
Note The slots in the brackets marked RIGHT are for securing cables with cable ties.
Figure 1 Brackets for Rack-Mounting of Cisco 2691 Routers
Attach the mounting brackets to the chassis as shown in Figure 2, Figure 3, Figure 4, or Figure 5, using the screws provided in the bracket kit. Use a number 2 Phillips screwdriver to install the bracket screws.
Caution Your chassis installation must allow unrestricted airflow for chassis cooling. For mounting in a 19-inch rack, be sure to install the wide bracket (marked RIGHT) on the side where the cooling fans are located. For installation on a desktop, keep at least 1 inch of clear space beside the cooling fans.
Figure 2 Bracket Installation for Center Mounting with Front Panel Forward
Figure 3 Bracket Installation for Center Mounting with Rear Panel Forward
Figure 4 Bracket Installation for Front Mounting
Figure 5 Bracket Installation for Rear Mounting
Installing Chassis in Rack
Install the chassis in the rack. Rack-mounting screws are not provided with the router. Use two screws for each side (supplied with the rack).
Installing on Desktop
Caution If you place the Cisco router on a desktop, do not place anything that weighs more than 10 pounds (4.5 kilograms) on top of the chassis.
Grounding the Chassis
You must connect the chassis to a reliable earth ground; the ground wire must be installed in accordance with local electrical safety standards.
•For NEBS-compliant grounding, use size AWG 6 (13 mm2) wire and the ground lug provided in the accessory kit.
•For NEC-compliant grounding, use size AWG 14 (2 mm2) or larger wire and an appropriate user-supplied ring terminal.
•For EN/IEC 60950-compliant grounding, use size AWG 18 (1 mm2) or larger wire and an appropriate user-supplied ring terminal.
To connect the chassis to a reliable earth ground, perform the following steps:
Step 1 Strip one end of the ground wire to the length required for the ground lug or terminal.
•For the NEBS ground lug—approximately 0.75 in. (20 mm)
•For user-provided ring terminal—as required
Step 2 Crimp the ground wire to the ground lug or ring terminal, using a crimp tool of the appropriate size.
Step 3 Attach the ground lug or ring terminal to the chassis as shown in Figure 6 or Figure 7. For the ground lug, use the two screws with captive locking washers provided. For a ring terminal, use one of the screws provided. Use a number 2 Phillips screwdriver, and tighten the screws to a torque of 8 to 10 in-lb (0.9 to 1.1 N-m).
Step 4 Connect the other end of the ground wire to a grounding point at your site.
Figure 6 NEBS-Compliant Chassis Ground Connection Using Ground Lug
Figure 7 Chassis Ground Connection Using Ring Terminal
4 Connect Cables
Warning Do not work on the system, or connect or disconnect cables during periods of lightning activity. Statement 1001
System Management Connections
The connections described in Table 1 provide system management access.
Table 1 System Management Connections
Port Color Connected To: Cable
PC or ASCII terminal communication port (usually labeled COM)
RJ-45-to-DB-9 adapter cable
Modem for remote access
RJ-45-to-DB-25 adapter cable
Warning Read the installation instructions before connecting the system to the power source. Statement 1004
Note The installation must comply with all required electrical codes applicable at the installation site.
Connecting Routers to AC Power
If your router uses AC power, connect it to a 15 A, 120 VAC (10 A, 240 VAC) circuit with overcurrent protection.
Note The input voltage tolerance limits for AC power are 85 and 264 VAC.
Warning AC connected units must have a permanent ground connection in addition to the power cable ground wire. NEBS-compliant grounding satisfies this requirement. Statement 284
Warning This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that the protective device is rated not greater than:
15A, 120VAC (10A, 240VAC). Statement 1005
Connecting the Router to DC Power
If your router has a DC-input power supply, follow the directions in this section for proper wiring.
Warning This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that the protective device is rated not greater than:
15A, 60VDC. Statement 1005
Warning Use copper conductors only. Statement 1025
Caution If you connect dual DC power sources, both sources must be the same polarity. Do not connect a -DC with a +DC source to a Cisco 2691 router. Opposite-polarity sources damage the power supply.
DC Wiring Requirements
A Cisco 2691 router with a DC-input power supply requires copper wire for the power connections. Table 2 summarizes the wiring requirements.
You can connect a single DC power source to either the A input or the B input. If there are dual power sources, connect one source to the A input and one source to the B input; both sources must be the same polarity and voltage.
Note For installations compliant with the National Electric Code, AWG 14 (2.0 mm2) wire is required for DC input and safety ground wire.
Table 2 DC Wiring Requirements for Cisco 2691 Routers
Installed Power Supply DC Input DC Input
Wire Size 1
Safety Ground Wire Size Overcurrent Protection
Nominal 24/48 VDC2
24 - 36 V, 8 A, positive or negative, single or dual sources
15 A maximum
36 - 60 V, 4 A, positive or negative, single or dual sources
15 A maximum
1 See the note above this table for National Electric Code wire size requirements.
2 The input voltage tolerance limits for nominal 24/48 V power supplies are 18 and 72 VDC.
Wiring Procedure for DC Input
To connect the router to a DC power source, perform the following steps:
Step 1 Remove power from the DC circuit. To ensure that power is removed from the DC circuit, locate the circuit breaker for the DC circuit, switch the circuit breaker to the OFF position, and tape the circuit-breaker switch in the OFF position.
Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. Statement 1003
Tip Secure all power cabling when installing this unit to avoid disturbing field-wiring connections.
Step 2 Strip the wires to the appropriate length for the terminals. The strip length is 3/16 in. to 1/4 in. (5 mm to 7 mm).
Step 3 Remove the plastic covers from the terminal block. Save them for reinstallation after you finish wiring.
Note Do not remove the colored screw at either end of the terminal block. Those are the terminal mounting screws.
Step 4 Connect the wires to the terminal block, starting with the safety ground wire. Insert each wire into the appropriate terminal as shown in Figure 8. To avoid interference with the on/off switch, insert the wires from below. Tighten the terminal screws to 8.0 ± 0.5 in-lb (0.9 ± 0.05 N-m).
Warning The illustration shows the DC power supply terminal block. Wire the DC power supply as illustrated. The proper wiring sequence is ground to ground, positive to positive, and negative to negative. The ground wire should always be connected first and disconnected last. Statement 239
Warning An exposed wire lead from a DC-input power source can conduct harmful levels of electricity. Be sure that no exposed portion of the DC-input power source wire extends from the terminal block plug. Statement 122
Caution Do not overtorque the terminal block contact screws. Recommended torque is 8.0 ± 0.5 in-lb (0.9 ± 0.05 N-m).
Figure 8 DC Power Connections
Step 5 Install the plastic covers over the terminal block. (See Figure 9.)
Step 6 Secure the wires using cable ties as shown in Figure 9. The chassis has a cable-tie attachment below and to the right of the terminal block.
Step 7 Turn on power to the DC circuit.
Figure 9 Wire Routing and Attachment
Connecting Routers to the Cisco Redundant Power System
If your router uses the Cisco Redundant Power System (RPS), refer to the Cisco RPS Hardware Installation Guide for instructions about the power connections. To locate these documents, see the "Where to Go Next" section.
WAN, LAN, and Voice Connections
The connections and cables listed here are described in detail in the following documents:
To locate these documents, see the "Where to Go Next" section.
Table 3 summarizes some typical WAN, LAN, and voice connections for the Cisco 2691 routers.
Table 3 WAN, LAN, and Voice Connections
Port or Connection Port Type, Color Connected To: Cable
Ethernet hub or Ethernet switch
T1 or E1 network
CSU/DSU and serial network or equipment
Cisco serial transition cable that matches the signaling protocol (EIA/TIA-232, EIA/TIA-449, V.35, X.21, or EIA-530)
and the serial port operating mode (DTE or DCE).1
Cisco Smart serial
Cisco Smart compact connector, blue
CSU/DSU and serial network or equipment (For WIC-2T and WIC-2A/S only)
Network demarcation device for service provider's DSL interface
T1 digital voice
RJ-48 T1 cable
Analog voice FXS
Analog voice FXO
Central office, analog PBX
Analog voice E&M
BRI S/T WAN
NT1 device or private integrated network exchange (PINX)
BRI U WAN
External T1 CSU
DB-15 T1 serial cable
DB-15 to BNC, DB-15 to DB-15, DB-15 to twinax, or DB-15 to RJ-45
Token Ring device
RJ-45 Token Ring cable
8-pin modular, blue
5 Power Up the Router
Checklist for Power-Up
You are ready to power up the Cisco router after the following steps are completed:
•Chassis is securely mounted and grounded.
•Power and interface cables are connected.
•Your PC terminal emulation program is configured for 9600 baud, 8 data bits, 1 stop bit, and no parity.
•You have selected passwords for access control.
•You have determined the IP addresses for the Ethernet and serial interfaces.
Front Panel Indicators
The following indicator LEDs provide power, activity, and status information:
•PWR (green)—Lit when power is on
•SYS/RPS or RPS (green)
–Rapid blinking (200 ms)—System is booting
–Slow blinking (1 s)—Redundant power supply (RPS) failure
–Continuous on—System OK
•ACT (green)—Blinks during system activity, such as interrupts and packet transfers
To power up your Cisco router and verify that it goes through its initialization and self-test, perform this procedure. When the procedure is finished, the Cisco router is ready to be configured.
Note To view the boot sequence through a terminal session, you must have a console connection to the Cisco router before it powers on.
Step 1 Make sure that your PC is powered up and connected as described in the "Checklist for Power-Up" section.
Step 2 Move the power switch to the ON position.
The green POWER or PWR LED on the front of the chassis comes on and the fan operates. If this does not happen, see the power-up procedure in the Cisco 2600 Series Routers Hardware Installation Guide.
Messages begin to appear in your terminal emulation program window.
Caution Do not press any keys on the keyboard until the messages stop. Any keys pressed during this time are interpreted as the first command typed when the messages stop, which might cause the router to power off and start over. It takes a few minutes for the messages to stop.
You may see different startup messages:
•If you see the following messages, the router has booted with a configuration file and is ready for initial configuration using the Cisco Router and Security Device Manager (SDM):yourname con0 is now availablePress RETURN to get started.
See the "Initial Configuration Using Cisco Router and Security Device Manager" section to learn how to configure your router using SDM or to learn how to obtain SDM and install it on your router.
•If you see the following messages, the router has booted and is ready for initial configuration using the setup command facility or the command-line interface (CLI).--- System Configuration Dialog ---At any point you may enter a question mark '?' for help.Use ctrl-c to abort configuration dialog at any prompt.Default settings are in square brackets ''.Would you like to enter the initial configuration dialog? [yes/no]:
To learn how to use the setup command facility to configure the router, see the "Initial Configuration Using the Setup Command Facility" section. To learn how to use the CLI to configure the router, see the "Initial Configuration Using the CLI (Manual Configuration)" section.
Note If the rommon 1> prompt appears, your system has booted in ROM monitor mode. For information on the ROM monitor, see the router rebooting and ROM monitor information in the Cisco IOS Configuration Fundamentals Configuration Guide for your Cisco IOS software release.
You can access this document at the locations described in the "Where to Go Next" section.
6 Perform Initial Configuration
You can configure your router by using one of the following methods:
•Cisco Router and Security Device Manager (SDM)—If your router was purchased with a VPN bundle, SDM is installed on the router. For instructions on configuring your router by using SDM, refer to the Cisco Router and Security Device Manager (SDM) Quick Start Guide that shipped with your router. See the "Initial Configuration Using Cisco Router and Security Device Manager" section for additional information.
•Setup command facility—You can use the setup command facility to configure basic router information. After the configuration file has been created, you can use the CLI or SDM to perform additional configuration. See the "Initial Configuration Using the Setup Command Facility" section for additional information.
•Command-line interface (CLI)—If you prefer to use the Cisco IOS CLI, see the "Initial Configuration Using the CLI (Manual Configuration)" section for instructions on how to use the CLI.
Note You need to understand how interfaces are numbered so that you know which interface you are configuring. If you need help with interface and port numbering, see the "Interface Numbering" section.
Initial Configuration Using Cisco Router and Security Device Manager
If the following messages appear at the end of the startup sequence, Cisco Router and Security Device Manager (SDM) is installed on your router:yourname con0 is now availablePress RETURN to get started.
For instructions on configuring your router by using SDM, refer to the Cisco Router and Security Device Manager (SDM) Quick Start Guide.
Tip If the messages above do not appear, SDM and the Cisco Router and Security Device Manager (SDM) Quick Start Guide were not shipped with your router. If you want to use SDM, you can download the latest version of SDM and instructions for installing it on your router from the following location:
To obtain the SDM quick start guide, SDM release notes, and other SDM documentation, go to www.cisco.com/go/sdm and click the Technical Documentation link.
Initial Configuration Using the Setup Command Facility
This section shows how to use the setup command facility to configure a host name for the router, set passwords, and configure an interface for communication with the management network. If you see the following messages at the end of the startup sequence, the setup command facility has been invoked automatically:--- System Configuration Dialog ---At any point you may enter a question mark '?' for help.Use ctrl-c to abort configuration dialog at any prompt.Default settings are in square brackets ''.Would you like to enter the initial configuration dialog? [yes/no]:
The setup command facility prompts you for basic information about your router and network, and it creates an initial configuration file.The prompts vary, depending on your router model, the installed interface modules, and the software image. The following example and the user entries (in bold) are shown as examples only.
For interface numbering information, see the "Interface Numbering" section.
Note If you make a mistake while using the setup command facility, you can exit and run the setup command facility again. Press Ctrl-C, and enter setup at the privileged EXEC mode prompt (
Step 1 To proceed using the setup command facility, enter yes.Would you like to enter the initial configuration dialog? [yes/no]: yes
Step 2 When the following messages appear, press Return to enter basic management setup:At any point you may enter a question mark '?' for help.Use ctrl-c to abort configuration dialog at any prompt.Default settings are in square brackets ''.Basic management setup configures only enough connectivityfor management of the system, extended setup will ask youto configure each interface on the systemWould you like to enter basic management setup? [yes/no]: yes
Step 3 Enter a host name for the router (this example uses 2691):Configuring global parameters:Enter host name [Router]: 2691
Step 4 Enter an enable secret password. This password is encrypted (more secure) and cannot be seen when viewing the configuration:The enable secret is a password used to protect access toprivileged EXEC and configuration modes. This password, afterentered, becomes encrypted in the configuration.Enter enable secret: xxxxxx
Step 5 Enter an enable password that is different from the enable secret password. This password is not encrypted (less secure) and can be seen when viewing the configuration:The enable password is used when you do not specify anenable secret password, with some older software versions, andsome boot images.Enter enable password: xxxxxx
Step 6 Enter the virtual terminal password, which prevents unauthenticated access to the router through ports other than the console port:The virtual terminal password is used to protectaccess to the router over a network interface.Enter virtual terminal password: xxxxxx
Step 7 Respond to the following prompts as appropriate for your network:Configure SNMP Network Management? [yes]:Community string [public]:
Step 8 A summary of the available interfaces is displayed:
Note The interface numbering that appears is dependent on the type of Cisco modular router platform and on the installed interface modules and cards.
Current interface summaryController Timeslots D-Channel Configurable modes StatusT1 0/0 24 23 pri/channelized Administratively upAny interface listed with OK? value "NO" does not have a valid configurationInterface IP-Address OK? Method Status ProlFastEthernet0/0 unassigned NO unset up upFastEthernet0/1 unassigned NO unset up dow
Step 9 Select one of the available interfaces for connecting the router to the management network:Enter interface name used to connect to themanagement network from the above interface summary: fastethernet0/0
Step 10 Respond to the following prompts as appropriate for your network:Configuring interface FastEthernet0/0:Use the 100 Base-TX (RJ-45) connector? [yes]: yesOperate in full-duplex mode? [no]: noConfigure IP on this interface? [yes]: yesIP address for this interface: 22.214.171.124Subnet mask for this interface [255.255.0.0] : 255.255.0.0Class B network is 126.96.36.199, 16 subnet bits; mask is /16
Step 11 The configuration is displayed:The following configuration command script was created:hostname 2691enable secret 5 $1$D5P6$PYx41/lQIASK.HcSbfO5q1enable password xxxxxxline vty 0 4password xxxxxxsnmp-server community public!no ip routing!interface FastEthernet0/0no shutdownmedia-type 100BaseXhalf-duplexip address 188.8.131.52 255.255.0.0!interface FastEthernet0/1shutdownno ip address!end
Step 12 Respond to the following prompts. Select  to save the initial configuration.: Go to the IOS command prompt without saving this config. Return back to the setup without saving this config. Save this configuration to nvram and exit.Enter your selection : 2Building configuration...Use the enabled mode 'configure' command to modify this configuration.Press RETURN to get started! RETURN
Step 13 The user prompt appears.2691>
After you complete the initial configuration tasks, your Cisco router is ready to configure for specific functions. See the "Where to Go Next" section for information about locating documentation for advanced configuration procedures.
Initial Configuration Using the CLI (Manual Configuration)
This section shows how to bring up a command-line interface (CLI) prompt for configuration using the CLI, and it directs you to documentation for the CLI configuration.You can use the CLI if you see the following messages at the end of the startup sequence:--- System Configuration Dialog ---At any point you may enter a question mark '?' for help.Use ctrl-c to abort configuration dialog at any prompt.Default settings are in square brackets ''.Would you like to enter the initial configuration dialog? [yes/no]:
If these messages do not appear, SDM and a default configuration file have been installed on the router at the factory. To use SDM to configure the router, see the "Initial Configuration Using Cisco Router and Security Device Manager" section.
For interface numbering information, see the "Interface Numbering" section.
Step 1 To proceed with manual configuration using the CLI, enter no.Would you like to enter the initial configuration dialog? [yes/no]: no
Step 2 Press Return to terminate autoinstall and continue with manual configuration.Would you like to terminate autoinstall? [yes] Return
Several messages are displayed, ending with a line similar to the following:...Copyright (c) 1986-2000 by cisco Systems, Inc.Compiled <date> <time> by <person>
Step 3 Press Return to bring up the
Router>prompt....flashfs: Initialization complete.Router>
Step 4 Enter privileged EXEC mode.Router> enableRouter#
Note To avoid losing work you have completed, be sure to save your configuration occasionally as you proceed. Use the copy running-config startup-config command to save the configuration to NVRAM.
For configuration using the CLI, refer to the applicable configuration procedures in the Software Configuration Guide: Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers. See the "Where to Go Next" section for information about accessing this document.
7 Interface Numbering
Each individual interface (port) on a Cisco 2691 router is identified by number as described in the following sections.
WAN and LAN Interface Numbering
The Cisco 2691 router chassis contains the following WAN and LAN interface types:
•Built-in LAN interfaces: Ethernet, Fast Ethernet, Token Ring
Note The MTU size for the NM-1GE module cannot be set to support jumbo frames on the Cisco 2691 router.
•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-type Slot-number/Interface-number. Two examples are:
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 10 shows a router with:
•A 2-port T1 network module in slot 1 (containing the following ports: T1 1/0 and T1 1/1)
•Two built-in Ethernet 10/100 interfaces—Fast Ethernet 0/0 and Fast Ethernet 0/1
•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)
–If physical slot W0 is empty and physical slot W1 contains a 1-port serial WIC, the interface number 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.
Note The slot number for all WIC interfaces is always 0. (The W0 and W1 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.
Figure 10 Interface Numbering in Cisco 2691 Routers
Voice Interface Numbering
Voice interfaces are numbered as follows:
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
•1/0/1—Chassis slot 1/Voice module slot 0/Voice interface 1
•1/1/0—Chassis slot 1/Voice module slot 1/Voice interface 0
•1/1/1—Chassis slot 1/Voice module slot 1/Voice interface 1
8 Where to Go Next
For additional detailed configuration procedures, refer to the appropriate Cisco 2691 documentation or Cisco IOS software documentation, available online on Cisco.com:
Tip See the "Obtaining Documentation" section for help in locating these documents.
To access documentation on Cisco.com:
For Cisco 2600 series platform documentation, start on Cisco.com at http://www.cisco.com, and select Products & Services > Routers > Cisco 2600 Series Multiservice Platforms > Technical Documentation > Document type > Document.
For Cisco IOS software documentation, start on Cisco.com at http://www.cisco.com, and select Products & Services > IOS Software > Cisco IOS Software Releases > Your Cisco IOS software release.
To get updated information about platform support for features, select Feature Navigator II, if you have an account on Cisco.com. You can also access Feature Navigator II at http://www.cisco.com/go/fn.
To access documentation using Cisco Connection Online (CCO):
For Cisco 3631 platform documentation, start on Cisco.com at http://www.cisco.com, and click on the "Technical Documentation" tab under Useful Links. Under the Product Documentation heading, navigate to Modular Access Routers and to the documentation for your router.
For Cisco IOS software documentation, start on Cisco.com at http://www.cisco.com, and click on the "Technical Documentation" tab under Useful Links. Under the Product Documentation heading, navigate to the Cisco IOS software documentation for the Cisco IOS software release that is installed on your router.
9 Obtaining Documentation
Cisco documentation and additional literature are available on Cisco.com. Cisco also provides several ways to obtain technical assistance and other technical resources. These sections explain how to obtain technical information from Cisco Systems.
You can access the most current Cisco documentation at this URL:
You can access the Cisco website at this URL:
You can access international Cisco websites at this URL:
You can find instructions for ordering documentation at this URL:
You can order Cisco documentation in these ways:
•Registered Cisco.com users (Cisco direct customers) can order Cisco product documentation from the Ordering tool:
•Nonregistered Cisco.com users can order documentation through a local account representative by calling Cisco Systems Corporate Headquarters (California, USA) at 408 526-7208 or, elsewhere in North America, by calling 800 553-NETS (6387).
10 Documentation Feedback
You can send comments about technical documentation to firstname.lastname@example.org.
You can submit comments by using the response card (if present) behind the front cover of your document or by writing to the following address:
Attn: Customer Document Ordering
170 West Tasman Drive
San Jose, CA 95134-9883
We appreciate your comments.
11 Obtaining Technical Assistance
For all customers, partners, resellers, and distributors who hold valid Cisco service contracts, Cisco Technical Support provides 24-hour-a-day, award-winning technical assistance. The Cisco Technical Support Website on Cisco.com features extensive online support resources. In addition, Cisco Technical Assistance Center (TAC) engineers provide telephone support. If you do not hold a valid Cisco service contract, contact your reseller.
Cisco Technical Support Website
The Cisco Technical Support Website provides online documents and tools for troubleshooting and resolving technical issues with Cisco products and technologies. The website is available 24 hours a day, 365 days a year at this URL:
Access to all tools on the Cisco Technical Support Website requires a Cisco.com user ID and password. If you have a valid service contract but do not have a user ID or password, you can register at this URL:
Submitting a Service Request
Using the online TAC Service Request Tool is the fastest way to open S3 and S4 service requests. (S3 and S4 service requests are those in which your network is minimally impaired or for which you require product information.) After you describe your situation, the TAC Service Request Tool automatically provides recommended solutions. If your issue is not resolved using the recommended resources, your service request will be assigned to a Cisco TAC engineer. The TAC Service Request Tool is located at this URL:
For S1 or S2 service requests or if you do not have Internet access, contact the Cisco TAC by telephone. (S1 or S2 service requests are those in which your production network is down or severely degraded.) Cisco TAC engineers are assigned immediately to S1 and S2 service requests to help keep your business operations running smoothly.
To open a service request by telephone, use one of the following numbers:
Asia-Pacific: +61 2 8446 7411 (Australia: 1 800 805 227)
EMEA: +32 2 704 55 55
USA: 1 800 553 2447
For a complete list of Cisco TAC contacts, go to this URL:
Definitions of Service Request Severity
To ensure that all service requests are reported in a standard format, Cisco has established severity definitions.
Severity 1 (S1)—Your network is "down," or there is a critical impact to your business operations. You and Cisco will commit all necessary resources around the clock to resolve the situation.
Severity 2 (S2)—Operation of an existing network is severely degraded, or significant aspects of your business operation are negatively affected by inadequate performance of Cisco products. You and Cisco will commit full-time resources during normal business hours to resolve the situation.
Severity 3 (S3)—Operational performance of your network is impaired, but most business operations remain functional. You and Cisco will commit resources during normal business hours to restore service to satisfactory levels.
Severity 4 (S4)—You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations.
12 Obtaining Additional Publications and Information
Information about Cisco products, technologies, and network solutions is available from various online and printed sources.
•Cisco Marketplace provides a variety of Cisco books, reference guides, and logo merchandise. Visit Cisco Marketplace, the company store, at this URL:
•The Cisco Product Catalog describes the networking products offered by Cisco Systems, as well as ordering and customer support services. Access the Cisco Product Catalog at this URL:
•Cisco Press publishes a wide range of general networking, training and certification titles. Both new and experienced users will benefit from these publications. For current Cisco Press titles and other information, go to Cisco Press at this URL:
•Packet magazine is the Cisco Systems technical user magazine for maximizing Internet and networking investments. Each quarter, Packet delivers coverage of the latest industry trends, technology breakthroughs, and Cisco products and solutions, as well as network deployment and troubleshooting tips, configuration examples, customer case studies, certification and training information, and links to scores of in-depth online resources. You can access Packet magazine at this URL:
•iQ Magazine is the quarterly publication from Cisco Systems designed to help growing companies learn how they can use technology to increase revenue, streamline their business, and expand services. The publication identifies the challenges facing these companies and the technologies to help solve them, using real-world case studies and business strategies to help readers make sound technology investment decisions. You can access iQ Magazine at this URL:
•Internet Protocol Journal is a quarterly journal published by Cisco Systems for engineering professionals involved in designing, developing, and operating public and private internets and intranets. You can access the Internet Protocol Journal at this URL:
•World-class networking training is available from Cisco. You can view current offerings at this URL: