Table of Contents

4T_GRWIC.fm

Cisco Connected Grid 4-Port Serial GRWIC Installation and Configuration Guide

First Published: May 6, 2014

Last Updated: June 30, 2014

OL-32086-03

This document describes how to install and configure the Cisco Connected Grid 4-port serial Grid Router WAN interface Card (GRWIC). This module enables the Cisco 2010 Connected Grid Router (CGR 2010) to connect to a Wide Area Network (WAN).

This document includes the following sections:

- Information About the 4-Port Serial GRWIC

- Hardware Overview

- Installing and Removing the 4-Port Serial GRWIC

- Connecting the 4-Port Serial GRWIC to the Network

- Software Configuration

- Related Documents

Information About the 4-Port Serial GRWIC

The single-slot 4-port serial GRWIC (product ID GRWIC-4T) provides serial connectivity to the CGR 2010, a ruggedized power utility substation router. The GRWIC (see Figure 1) has 4 serial ports that support V.10/V.11/V.28/V.35 signaling types and asynchronous and synchronous protocols.

Utilities commonly have legacy equipment that communicates over relatively slow serial links. The 4-port serial GRWIC helps customers to enable applications such as legacy protocol transport, console server, and dial access server. Combining a high-density serial GRWIC with the CGR 2010 enables energy networks to collect and transport data from a Supervisory and Data Acquisition (SCADA) system over an IP network.

Features

The 4-port serial GRWIC (see Figure 1) offers the following key features:

- Meets the following industry compliance standards:

– IEEE 1613 Power Substation Networking

– IEC 61850-3 Substation Networking

– IEC 60870-2-2 Environmental Classification

– IEC 60068-2-2 Environmental Testing

- Supports the following protocols:

– EIA-232

– EIA-449

– EIA-530, EIA-530A

– V.35

– X.21

- Supports asynchronous and synchronous protocols

- Hardware support for PPP, HDLC, and Bisync protocols

- Uses the Cisco 12-in-1 Serial Cable

- Supports lead manipulation

- Supports Raw Socket and Protocol Translation between T101 and T104 and between DNP3-IP and DNP3-Serial

Figure 1 The Cisco 4-Port Serial GRWIC

Timing Signals

The 4-port serial GRWIC interfaces support both the data terminal equipment (DTE) and data communication equipment (DCE) mode, depending on the mode of the compact serial cable attached to the port. To use a port as a DTE interface, you only need to connect a DTE compact serial cable to the port. When the system detects the DTE mode cable, it automatically uses the external timing signal. To use a port in DCE mode, you must connect a DCE compact serial cable and set the clock speed with the clock rate configuration command. See Configuring Basic Options to set the clock speed.

Encapsulation Protocols

Encapsulation protocols connect the Layer 2 (link layer) protocols with the Layer 3 (network layer) protocols. When traffic crosses a WAN link, the connection needs a layer 2 protocol to encapsulate traffic. The 4-port serial GRWIC interface supports the High-Level Data Link Control (HDLC), Point-to-point (PPP), and Frame Relay encapsulation protocols. The HDLC protocol, a proprietary protocol, decodes proprietary framing used by the routers on the PPP links. The standard PPP protocol supports PPP links analyzed by HDLC and can also be utilized for Frame Relay. The standard Frame Relay encapsulation protocol is a versatile and common encapsulation protocol used with Frame Relay. See Configuring Basic Options to set the encapsulation method.

Lead Manipulation

The lead manipulation feature allows a user to ignore input signals on the physical interface, view the state of the input signals, and monitor the transitions of the input signals. By default, Cisco IOS software requires assertion of some of the input leads on the physical interface. With lead manipulation, the user can configure the serial interface to ignore input signals. See Ignoring Input Signals.

Hardware Overview

This section includes the following topics:

- Specifications

- Ports and LEDs

- Cables

Specifications

This section includes the following topics:

- Hardware Specifications

- Environmental Specifications

- Power Specifications

Hardware Specifications

Table 1 summarizes the hardware specifications of the 4-port serial GRWIC supported on the CGR 2010.

Table 1 Hardware Specifications for the 4-Port Serial GRWIC

Item

Description

Dimensions (H x W x D)

3 x 2 x 6.5 in. (7.62 x 5.08 x 16.51 cm)

Slot Restrictions

None

Number of ports

4

Connector

Cisco 12-in-1 connector

Synchronous maximum speed (per port)

8 Mbps

Asynchronous maximum speed (per port)

230.4 kbps

Environmental Specifications

Table 2 lists the environmental specifications for the 4-port serial GRWIC.

Table 2 Environmental Specification for the 4-Port Serial GRWIC

Condition

Requirement

Operating Conditions

Temperature

-40ºF to 140ºF (-40 to +60ºC) continuous operating temperature range

-40ºF to 185ºF (-40 to +85ºC) type test for 100 hours at 85ºC

Relative humidity

5 to 95% non-condensing

Altitude

10,000 ft (3,048 m) Maximum operating temperature is de-rated with increasing altitude per IEEE 1613a-2008

Shock/vibration

30G @11 ms

Non-Operating Conditions

Temperature

-40ºF to 185ºF (-40ºC to 85ºC)

Relative humidity

5 to 95% non-condensing

Altitude

16,000 ft (4,876 m) Maximum operating temperature is de-rated with increasing altitude per IEEE 1613a-2008

Shock/vibration

40-50G (3.26 m/s minimum)

Free fall drop

4 in. (100 mm) per ENG-339611

Seismic/earthquake

NEBS GR-63 (5.4.1)

Power Specifications

Typical power consumption of the 4-port serial GRWIC is approximately 4.8W.

Ports and LEDs

Figure 2 shows the front panel of the 4-port serial GRWIC.

Figure 2 4-Port Serial GRWIC Front View

1

Serial port (4)

2

Bi-color LED for ports 0-3

Figure 2 shows that the 4-port serial GRWIC has one LED, labeled CONN, for ports 0-3. The LED lights when the serial port is connected. When the port is in DTE mode, the CONN LED indicates that Data Send Ready (DSR), Data Carrier Detect (DCD), and Clear To Send (CTS) have been detected. When the port is in DCE mode, Data Terminal Ready (DTR) and Ready To Send (RTS) have been detected. Table 3 describes the functions of the LEDs.

Table 3 Serial GRWIC LED

LED

Description

Solid Green

The card is active (initialized without error).

Blinking Green

At least one port is passing traffic.

Yellow

At least one port is in loopback mode.

Blinking Yellow

At least one port has failed.

Off

The card is is not active or has failed to initialize.

Cables

The interface cables for the 4-port serial GRWIC are rated for -4 degrees F (-20 degrees C) to 167 degrees F (75 degrees C). At -40C (the low end of the operating temperature range of the CGR 2010), the smart serial cable will perform optimally provided that the following conditions are met:

- The cable is not bent or flexed more than 5 times the nominal diameter.

- The cable is not strained under its own weight and is properly secured to the cable management system.

- The cable is not pinched and the cable jacket is not cracked from high impact or other damage.

- The cables connect equipment within a controlled environment such as an equipment room or vented cabinet and are not used outdoors in the field.

For information about connecting the cables, see “Connecting the 4-Port Serial GRWIC to the Network” section.

Table 4 lists the serial cables for the supported serial connection types.

Table 4 Interface Cables for 12-in-1 Connector

Interface Type and description

Cisco Product Number

Protocol Type

V.35 DTE, 10 ft (3 m), Plug M34

CAB-SS-V35MT

V.35 DTE SYNC

V.35 DCE, 10 ft (3 m), Socket M34

CAB-SS-V35FC

V.35 DCE SYNC

EIA/TIA-232 DTE, 10 ft (3 m), Plug DB-25

CAB-SS-232MT

RS232 DTE, Sync/Async, Max BAUD rate=230.4 kbps

EIA/TIA-232 DCE, 10 ft (3 m), Socket DB-25

CAB-SS-232FC

RS232 DCE, Sync/Async, Max BAUD rate=230.4 kbps

EIA/TIA-449 DTE, 10 ft (3 m), Plug DB-37

CAB-SS-449MT

RS-449 DTE SYNC

EIA/TIA-449 DCE, 10 ft (3 m), Socket, DB-37

CAB-SS-449FC

RS-449 DCE SYNC

X.21 DTE, 10 ft (3 m), Plug, DB-15

CAB-SS-X21MT

X.21 DTE SYNC

X.21 DCE, 10 ft (3 m), Socket, DB-15

CAB-SS-X21FC

X.21 DCE SYNC

EIA/TIA-530 DTE, 10 ft (3 m), Plug, DB-25

CAB-SS-530MT

RS-530 DTE SYNC

EIA/TIA-530 DTE, 10 ft (3 m), Plug, DB-25

CAB-SS-530FC

RS-530 DTE SYNC

EIA/TIA-530A DTE, 10 ft (3 m), Plug, DB-25

CAB-SS-530AMT

RS-530A DTE SYNC

EIA/TIA-530A DCE, 10 ft (3 m), Plug, DB-25

CAB-SS-530AFC

RS-530A DCE SYNC

Installing and Removing the 4-Port Serial GRWIC

This section describes how to install the 4-port serial GRWIC in the CGR 2010 and includes the following topics:

- Safety Warnings

- Installing a 4-Port Serial GRWIC

- Removing a 4-Port Serial GRWIC

Safety Warnings

This section includes the basic installation warning statements for the 4-port serial GRWIC. For regulatory compliance and safety information for the CGR 2010, refer to the Connected Grid Router 2000 Series Regulatory Compliance and Safety Information document.

http://www.cisco.com/en/US/docs/routers/access/2000/CGR2010/hardware/rcsi/rcsiCGR2000series.html

Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030

Warning Do not work on the system or connect or disconnect cables during periods of lightning activity. Statement 1001

Warning Read the installation instructions before connecting the system to the power source. Statement 1004

Warning Hazardous network voltages are present in WAN ports regardless of whether power to the unit is OFF or ON. To avoid electric shock, use caution when working near WAN ports. When detaching cables, detach the end away from the unit first. Statement 1026

Installing a 4-Port Serial GRWIC

You can install the 4-port serial GRWIC into one of four slots on the cable side of the router.

Follow these steps to install a 4-port serial GRWIC in a CGR 2010:

Step 1 Stand the GRWIC on end to install into the router slot. (See Figure 3.)

Figure 3 GRWIC Positioning to Install into the GCR 2010 Router

Step 2 Slide the GRWIC into the router slot. (See Figure 4.)

Figure 4 Proper Installation of a GRWIC

Step 3 Tighten the three captive screws on the front of the interface card.

Removing a 4-Port Serial GRWIC

To remove a 4-port serial GRWIC from a CGR 2010, perform these steps:

Step 1 Using a screwdriver, loosen the three captive screws on the 4-port serial GRWIC.

Step 2 Gently pull the module out of the slot.

Connecting the 4-Port Serial GRWIC to the Network

Before connecting a GRWIC to the network, ensure that the GRWIC is installed in the router and you have the proper cables for connecting the GRWIC to the network. See Table 4 for the cable descriptions.

Note The interface cables are designed to connect equipment within a controlled environment such as an equipment room or vented cabinet and are not designed or intended to be used outdoors in the field.

To connect the 4-port serial GRWIC to the network, follow these steps:

Step 1 Connect the serial cable to the connector on the GRWIC faceplate. (See Figure 5.)

Step 2 Secure the thumb screws on the cable to the GRWIC faceplate. (See Figure 5.)

Figure 5 Connecting the Serial GRWIC Interface

1

Serial interface

2

One of the serial cable types listed in Table 4 , “Interface Cables for 12-in-1 Connector” (female serial cable shown as an example)

3

Matching serial cable for type listed in Table 4 , “Interface Cables for 12-in-1 Connector” (male serial cable shown as an example)

Step 3 Route the serial cable using a cable management system, such as a vertical cable manager, to ensure that the weight of the cable is supported (see Figure 6). Allow a short length (3 to 6 inches) of the cable to exit perpendicular to the connector.

Figure 6 Routing the Serial Cable

1

Vertical cable manager

2

Serial cable

Step 4 Connect the female end of the serial cable to the male end of the other serial cable for back-to-back connectivity. (See Figure 5.)

Step 5 Connect the other end of the cable to the DTE or DCE.

Software Configuration

This section includes the following topics:

- Restrictions for the 4-Port Serial GRWIC

- Configuring the 4-Port Serial GRWIC

- Verifying Configuration

- Configuration Example

Restrictions for the 4-Port Serial GRWIC

- Network clocking synchronization is not supported. Note that the serial protocol is terminating at the GRWIC-4T and the raw packet is forwarded across the network. Therefore, end-to-end clocking is not required for reliable data transport.

- The GRWIC-4T does not support Nx64k/56kbps baud rates.

Configuring the 4-Port Serial GRWIC

This section includes the following topics:

- Configuring Basic Options

- Ignoring Input Signals

- Configuring Loopback Test

- Verifying Configuration

- Configuration Example

Configuring Basic Options

To configure basic options, including keepalive, clock rate, and encapsulation, perform the following steps:

Command

Purpose

Step 1

configure terminal

Enters global configuration mode.

Step 2

interface serial slot/subslot/port

Selects the interface to configure and enters interface configuration mode.

- slot/subslot/port —Specifies the location of the interface.

Step 3

ip address address mask

Sets the IP address and subnet mask.

- address —IP address

- mask —Subnet mask

Step 4

keepalive period

Integer value that represents the time interval, in seconds, of messages sent between DTE and DCE to ensure that the peer interface is active.

- period —The valid range is from 0 to 32767. The default is 10 seconds.

Step 5

clock rate bps

Configures the clock rate on the DCE side for the DCE to send traffic at the specified rate.

To remove the clock rate if you change the interface from a DCE to a DTE device, use the no form of this command. Using the no form of this command on a DCE interface sets the clock rate to the hardware-dependent default value. The default is 2016000 bps.

- bps —value in bits per second: 1200, 2400, 4800, 9600, 14400, 19200, 28800, 32000, 38400, 48000, 56000, 57600, 64000, 72000, 115200, 128000, 230400, 252000, 504000, 1008000, 2016000, 4032000, 8064000, <300-10000000>

Note The RS232 cable can operate only at clock speeds of 1200 to 252000.

Step 6

physical-layer {sync | async}

Specifies the mode of the serial interface as either synchronous or asynchronous.

- sync —synchronous mode (default).

- async —asynchronous mode.

Step 7

encapsulation { hdlc | ppp | frame-relay | raw-tcp | raw-udp }

Sets the encapsulation type on the interface.

- hdlc —High-Level Data Link Control (HDLC) protocol for serial interface (default).

- ppp —Point-to-Point Protocol (PPP).

- frame-relay —Frame Relay.

- raw-tcp —Raw Socket TCP for the asynchronous serial port.

- raw-udp —Raw Socket UDP for the asynchronous serial port.

.

Note See Configuring Raw Socket Protocol on the CGR 2010 Router for more information about configuring Raw Socket.

Ignoring Input Signals

You can configure an interface operating in DCE mode to ignore incoming Data Terminal Ready (DTR) or Ready to Send (RTS) signals. When you configure the ignore [ dtr | rts ] command, a signal is automatically seen as asserted.

To configure the interface to ignore DTR and RTS signals, perform the following steps:

Command

Purpose

Step 1

configure terminal

Enters global configuration mode.

Step 2

interface serial slot/subslot/port

Selects the interface to configure and enters interface configuration mode.

- slot/subslot/port —Specifies the location of the interface.

Step 3

ignore [dtr | rts]

Configures the DCE to ignore the specified signal.

- dtr —DCE ignores DTR signals.

- rts —DCE ignores RTS signals.

Configuring Loopback Test

To configure a loopback test to test the connectivity, perform the following steps:

Command

Purpose

Step 1

configure terminal

Enters global configuration mode.

Step 2

interface serial slot/subslot/port

Selects the interface to configure and enters interface configuration mode.

- slot/subslot/port —Specifies the location of the interface.

Step 3

loopback

Configures the local loopback.

Step 4

interface serial slot/subslot/port

Selects the interface to configure and enters interface configuration mode.

- slot/subslot/port —Specifies the location of the interface.

Step 5

loopback remote payload [ fdl ] [ ansi ]

Transmits a payload line loopback request to a remote device, which is used for testing the line and remote Data Service Unit (DSU).

- fdl ansi —Sends a repeating, 16-bit Extended Superframe (ESF) data link code word (00010100 11111111) to the remote end requesting that it enter into a network payload loopback.

Verifying Configuration

Command

Purpose

show running config

Shows the configuration of the CGR 2010, including active features and their settings.

show controllers serial slot/subslot/port

Displays serial controller statistics, including error and alarm information that is useful in troubleshooting line problems.

show interfaces serial

Shows information about the serial interface.

The following example shows output from the show controllers serial command:

UUT1#show controllers s0/0/0

Interface Serial0/0/0

Hardware is GRWIC-Serial

DCE V.35

Lead Modem Status

DCD=up DSR=up DTR=up RTS=up CTS=up

Lead Line Status

DCD=up DSR=up DTR=up RTS=up CTS=up

clock rate 2016000

idb at 0x2A5E02BC, driver data structure at 0x2A5E0F78

Stats for LED(s):

Loopback bitmask 0x0

LED1 is Green

GRWIC Register Base: 0x10000000

------------------

GRWIC Common Registers:

---------------------

id(0x00): 0x00000001 rev(0x01): 0x00000002 status(0x02): 0x00000000

tx crc(0x01): 0x00000000 ctrl(0x06): 0x00008081

GRWIC Serial Common Registers:

----------------------------

hwic_serial_rev(0x1000): 0x08232013 hwic_serial_ctrl(0x1004): 0x00008009

intr1_enable(0x1020): 0x0000002A intr2_enable(0x1022): 0x0000000F

GRWIC Serial SCC Registers:

----------------------------

ch_mode_cfg: 0x08019031 ch_flag_cfg: 0x0000007E ch_floctrl_cfg: 0x00000000

ch_int_enable: 0x000009FF ch_cmd_stat: 0x00000050 ch_tx_empty_stat: 0x00000001

GRWIC Serial DMA Registers:

-------------------------

Rx ring_start_ptr: 0x0E944C00 Rx ring_mask_index: 0x01F80060

internal_desc_stat: 0x0400060C internal_buff_addr: 0x0E965AC8

internal_context: 0x00000013 internal_fifo_data: 0x0E969567

Tx ring_start_ptr: 0x0E946080 Tx ring_mask_index: 0x03F80060

internal_desc_stat: 0x00000000 internal_buff_addr: 0x0E94C4F1

internal_context: 0x00000441 internal_fifo_data: 0x31555554

GRWIC Serial Interface Registers:

-------------------------------

intf_ctrl: 0x0019 modem_ctrl: 0x011D flow_ctrl: 0x7430 brg dvdr:0x0004

GRWIC TDM/FREQ Counter Registers:

--------------------------------

tdm_control: 0x0000 tdm_a_8k_divider: 0x0000 tdm_b_8k_divider: 0x0000

freq_count_port_sel: 0x000B freq_count: 0x14A4B6

0 input aborts on receiving flag sequence

0 throttles, 0 enables

0 overruns

0 transmitter underruns

0 transmitter CTS losts

0 aborted short frames

0 CRC short frames count

0 rxintr, 0 txintr, 0 rxerr, 0 txerr

0 rx_bogus_pkts, rx_bogus_flag FALSE

0 tx_abort, 0 tx_reset

tx_limited = 0(128) tx_count = 0

idb at 0x2A5E02BC, driver data structure at 0x2A5E0F78

Receive Ring

rxr head (12)(0x0E944C60), rxr tail (0)(0x0E944C00)

rmd(E944C00): desc_stat_len 8400060C desc_buff_addr E964DC8

rmd(E944C08): desc_stat_len 8400060C desc_buff_addr E9640C8

rmd(E944C10): desc_stat_len 8400060C desc_buff_addr E967B48

.

.

.

Transmit Ring

txr head (12)(0x0E9460E0), txr tail (12)(0x0E9460E0)

tmd(E946080): desc_stat_len 05C00000 desc_buff_addr DDA00D4

tmd(E946088): desc_stat_len 05C00000 desc_buff_addr DDA0254

tmd(E946090): desc_stat_len 05C00000 desc_buff_addr DDA09D4

.

.

.

buffer size 1524

UUT1#

This example shows the output from the show interfaces command for a serial interface:

UUT1#show int s0/0/0

Serial0/0/0 is up, line protocol is up

Hardware is GRWIC-Serial

MTU 1500 bytes, BW 2048 Kbit/sec, DLY 20000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation PPP, LCP Open, loopback not set

Keepalive set (10 sec)

DTR is pulsed for 1 seconds on reset

Time to interface disconnect: idle 00:59:42

Interface is bound to Di1 (Encapsulation PPP)

CRC checking enabled

Last input 00:00:07, output 00:00:07, output hang never

Last clearing of "show interface" counters 04:07:36

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue: 0/40 (size/max)

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

1852 packets input, 47678 bytes, 0 no buffer

Received 0 broadcasts (0 IP multicasts)

0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

2101 packets output, 50723 bytes, 0 underruns

0 output errors, 0 collisions, 396 interface resets

73 unknown protocol drops

0 output buffer failures, 0 output buffers swapped out

596 carrier transitions

DCD=up DSR=up DTR=up RTS=up CTS=up

UUT1#

Configuration Example

This section includes the following topics:

- Frame Relay

- Dial-on-Demand (DDR)

Frame Relay

The following example shows a Frame Relay configuration between routers UUT-1 and UUT-2:

UUT-1:

interface Serial0/0/3

no ip address

encapsulation frame-relay

no keepalive

!

interface Serial0/0/3.1 point-to-point

ip address 172.16.120.105 255.255.255.0

frame-relay interface-dlci 101

!

UUT-2:

interface Serial0/0/3

no ip address

encapsulation frame-relay

no keepalive

clock rate 64000

!

interface Serial0/0/3.1 point-to-point

ip address 172.16.120.120 255.255.255.0

frame-relay interface-dlci 101

!

Verify ping works to the other end, and verify the output of the following show commands:

UUT-1# show frame map

Serial0/0/3.1 (up): point-to-point dlci, dlci 101(0x65,0x1850), broadcast

UUT-1#

UUT-1#

UUT-1# show frame pvc

PVC Statistics for interface Serial0/0/3 (Frame Relay DTE)

Active Inactive Deleted Static

Local 1 0 0 0

Switched 0 0 0 0

Unused 0 0 0 0

DLCI = 101, DLCI USAGE = LOCAL, PVC STATUS = STATIC, INTERFACE = Serial0/0/3.1

input pkts 7 output pkts 9 in bytes 2081

out bytes 2720 dropped pkts 0 in pkts dropped 0

out pkts dropped 0 out bytes dropped 0

in FECN pkts 0 in BECN pkts 0 out FECN pkts 0

out BECN pkts 0 in DE pkts 0 out DE pkts 0

out bcast pkts 9 out bcast bytes 2720

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

pvc create time 00:07:36, last time pvc status changed 00:07:36

UUT-1#

Dial-on-Demand (DDR)

The following example shows the configuration for DDR:

interface Dialer1

ip address 1.1.1.1 255.255.255.0

encapsulation PPP

dialer remote-name R2

dialer string 555430

dialer caller 555430

dialer pool 10

dialer group 1

dialer-list dialer group protocol <ip> permit

interface s0/0/2

dialer in-band

encapsulation ppp

dialer pool-member 10

Feature History

Cisco Feature Navigator provides information about platform support, software image support, including software image and their supported software release, feature set, or platform.

You can access Cisco Feature Navigator by going to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Table 5 lists the release history for this feature.

Note Table 5 lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

Table 5 Feature Information for 4-Port Serial GRWIC

Feature Name

Release

Feature Information

4-port serial GRWIC module for the Connected Grid Router 2010

15.4.(1)CG1

Provides the CGR 2010 with WAN connectivity options for serial protocols and interfaces.

Related Documents

- Cisco Connected Grid Routers 2010 Hardware Installation Guide

- Configuring Raw Socket Protocol on the CGR 2010 Router

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, using the Cisco Bug Search Tool (BST), submitting a service request, and gathering additional information, see What’s New in Cisco Product Documentation at: http://www.cisco.com/c/en/us/td/docs/general/whatsnew/whatsnew.html .

Subscribe to What’s New in Cisco Product Documentation , which lists all new and revised Cisco technical documentation, as an RSS feed and deliver content directly to your desktop using a reader application. The RSS feeds are a free service.

This document is to be used in conjunction with the documents listed in the “Related Documents” section.

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No combinations are authorized or intended under this document.

Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.

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