Cisco 3600 Series - Release Notes for Release 12.1(5)T Feature Packs [Cisco IOS Software Releases 12.1 T]

Release Notes for Cisco IOS Release 12.1(5)T Feature Packs for Cisco 3600 Series Routers
How to Use These Release Notes
What Is a Feature Pack?
Memory Options
Software Compatibility

Determining Your Software Release
Updating to a New Software Release

Product Number Quick-Reference List
Feature Pack Overview
Features by Feature Set
Installation Notes

Installing Software Images Using RSL

Recovering From a Connection Error
Restoring the Startup Configuration
Installation Tips

Alternatives to RSL

Installing the Router Software Using the Console or Auxiliary Port
Installing the Router Software Using a TFTP Server Application

Related Documentation

Release-Specific Documents
Platform-Specific Documents
Feature Modules
Cisco IOS Documentation Set

Documentation Modules
Release 12.1 Documentation Set

Obtaining Documentation

World Wide Web
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Obtaining Technical Assistance

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Release Notes for Cisco IOS Release 12.1(5)T Feature Packs for Cisco 3600 Series Routers

November 27, 2000

These release notes describe Cisco IOS Release 12.1(5)T feature packs for Cisco 3600 series routers. Use them with the documents listed in the "Related Documentation" section.

The Cisco 3600 series includes the following routers:

Cisco 3620
Cisco 3640
Cisco 3661
Cisco 3662

These release notes describe the following topics:

How to Use These Release Notes

Use Table 1, "Cisco 3600 Series Routers Default Memory and Upgrade Options," to find the factory-default memory and available upgrades for your router.

Use Table 2, "Feature Pack Product Numbers," to identify the software image to load.

Use Table 3, "Cisco 3600 Series Feature Pack Image Filenames and Memory Requirements," to find the memory required for this image.

Use Table 4, Table 5, Table 6, and Table 7 to identify the features supported in each feature set image.

What Is a Feature Pack?

A feature pack contains the following items:

CD-ROM with the following software:
- Cisco IOS feature set software images, which might include bundled modem firmware
- Router Software Loader (RSL) program (a Windows 95 application)
- Trivial File Transfer Protocol (TFTP) server application (for Windows 95 only)
Getting Started with the Router Software Loader CD booklet
Release notes (this document)
Software license for using Cisco software in object code form on a single access server or router
Documentation CD-ROM containing all Cisco documentation

The heart of a feature pack is the CD-ROM containing software images and the RSL, a Windows 95 application that loads an image onto a router or access server. Each feature pack CD-ROM contains one or more Cisco IOS feature sets.

The CD booklet Getting Started with the Router Software Loader explains how to use the RSL to install a router image. Before running the RSL, read the "Installing Software Images Using RSL" section. If you are loading software on a preconfigured router, you should save the router configuration file on your PC before beginning the image download process, as described in Getting Started with the Router Software Loader.

If you cannot use the RSL to load images, follow the instructions in the "Alternatives to RSL" section.

Memory Options

Cisco 3620 routers are shipped with 8 MB of system Flash memory and 32 MB of DRAM. They support a maximum of 32 MB of Flash memory and 64 MB of DRAM.

Cisco 3640 routers are shipped with 8 MB of system Flash memory and 32 MB of DRAM. They support a maximum of 32 MB of Flash memory and 128 MB of DRAM.

Cisco 3661 and Cisco 3661 routers are shipped with 8 MB of system Flash memory (16 MB for Telco models Cisco 3662-AC-CO and Cisco 3662-DC-CO) and 32 MB of DRAM. They support a maximum of 64 MB of Flash memory and 256 MB of DRAM.

All models support PCMCIA Flash memory cards, available in 4 MB to 16 MB sizes.

Table 1 describes default memory and upgrade options for Cisco 3600 series routers.

Note Part numbers without an equals sign (=) identify products installed in a router at the factory. Part numbers followed by an equals sign identify products sold as spares (separately).

Table 1 Cisco 3600 Series Routers Default Memory and Upgrade Options

Memory Type	Default	Upgrade Options
Flash SIMM	8 MB	For all Cisco 3600 series routers: Factory Upgrades: 16-MB upgrade: MEM3600-8U16FS 32-MB upgrade: MEM3600-8U32FS 32-MB upgrade: MEM3600-16U32FS Field Upgrades: 4-MB upgrade: MEM3600-4FS= 8-MB upgrade: MEM3600-8FS= 16-MB upgrade: MEM3600-16FS= 16-MB upgrade: MEM3600-2X8FS= 32-MB upgrade: MEM3600-2X16FS= For the Cisco 3661 and Cisco 3662 only: Factory upgrades: 64-MB upgrade: MEM3600-8U64FS 64-MB upgrade: MEM3600-16U64FS Field upgrades: 32-MB upgrade: MEM3660-32FS=
Flash PCMCIA	0 MB	For all Cisco 3600 series routers: Factory upgrades: 4-MB upgrade: MEM3600-4FC 8-MB upgrade: MEM3600-8FC 16-MB upgrade: MEM3600-16FC Field upgrades: 4-MB upgrade: MEM3600-4FC= 8-MB upgrade: MEM3600-8FC= 16-MB upgrade: MEM3600-16FC=
DRAM SIMM	32 MB	For the Cisco 3620: 48-MB upgrade: MEM3620-32U48D 64-MB upgrade: MEM3620-32U64D Field upgrades: 4-MB upgrade: MEM3620-4D= 8-MB upgrade: MEM3620-8D= 16-MB upgrade: MEM3620-16D= For the Cisco 3640: Factory upgrades: 48-MB upgrade: MEM3640-32U48D 64-MB upgrade: MEM3640-32U64D 128-MB upgrade: MEM3640-32U128D Field upgrades: 4-MB upgrade: MEM3640-4D= 8-MB upgrade: MEM3640-8D= 16-MB upgrade: MEM3640-16D= 32-MB upgrade: MEM3640-32D= 8-MB upgrade: MEM3640-2X4D= 16-MB upgrade: MEM3640-2X8D= 32-MB upgrade: MEM3640-2X16D= 64-MB upgrade: MEM3640-2X32D= 128-MB upgrade: MEM3640-4X32D=
SDRAM SIMM	32 MB	For the Cisco 3661 and Cisco 3662: Factory upgrades: 48-MB upgrade: MEM3660-32U48D 64-MB upgrade: MEM3660-32U64D 96-MB upgrade: MEM3660-32U96D 96-MB upgrade: MEM3660-64U96D 128-MB upgrade: MEM3660-32U128D 128-MB upgrade: MEM3660-64U128D 256-MB upgrade: MEM3660-32U256D 256-MB upgrade: MEM3660-64U256D Field upgrades: 32-MB upgrade: MEM3660-32D= 64-MB upgrade: MEM3660-64D= 128-MB upgrade: MEM3660-128D= 128-MB upgrade: MEM3660-2X64D= 256-MB upgrade: MEM3660-2X128D=

Software Compatibility

The feature packs described in these release notes contain Cisco IOS Release 12.1(5)T software images, some earlier images, and RSL Version 7.10. Before running RSL, read the "Installing Software Images Using RSL" section.

Determining Your Software Release

To determine the version of Cisco IOS software that is currently running on your Cisco 3600 series router, enter the show version command. The version number is indicated on the second line:

 Router> show version

 Cisco Internetwork Operating System Software

 IOS (tm) 3600 Software (C3600-i-mz), Version 12.1(5)T, RELEASE SOFTWARE

The output includes further information such as processor revision numbers, memory amounts, hardware IDs, and partition information.

Updating to a New Software Release

For general information about software upgrades, see Upgrading the Cisco IOS Software Release in Cisco Routers and Modems, located at:

http://www.cisco.com/warp/public/620/6.html

For information about upgrade paths, see the Cisco IOS Software Release 12.0 T Upgrade Paths product bulletin (No. 819), located at:

http://www.cisco.com/warp/public/cc/pd/iosw/iore/iomjre12/prodlit/819_pp.htm

This product bulletin does not contain information specific to Cisco IOS Release 12.1(5)T, but provides general upgrade information that may apply to this release.

Product Number Quick-Reference List

Table 2 lists Cisco product numbers for the feature packs supported in this release.

Table 2 Feature Pack Product Numbers

Product Number	Description
CD36-C-12.1.5=	Cisco 3600 IP Feature Pack 12.1(5)T
CD36-CH-12.1.5=	Cisco 3600 IP/FW¹ Feature Pack 12.1(5)T
CD36-CP-12.1.5=	Cisco 3600 IP Plus Feature Pack 12.1(5)T
CD36-CHL-12.1.5=	Cisco 3600 IP/FW Plus IPSec 56 Feature Pack 12.1(5)T
CD36-CHK2-12.1.5=	Cisco 3600 IP/FW Plus IPSec 3DES Feature Pack 12.1(5)T
CD36-CK2-12.1.5=	Cisco 3600 IP Plus IPSec 3DES Feature Pack 12.1(5)T
CD36-CL-12.1.5=	Cisco 3600 IP Plus IPSec 56 Feature Pack 12.1(5)T
CD36-B-12.1.5=	Cisco 3600 IP/IPX/AT/DEC Feature Pack 12.1(5)T
CD36-BP-12.1.5=	Cisco 3600 IP/IPX/AT/DEC Plus Feature Pack 12.1(5)T
CD36-BHP-12.1.5=	Cisco 3600 IP/IPX/AT/DEC/FW Plus Feature Pack 12.1(5)T
CD36-AP-12.1.5=	Cisco 3600 Enterprise Plus Feature Pack 12.1(5)T
CD36-AL-12.1.5=	Cisco 3600 Enterprise Plus IPSec 56 Feature Pack 12.1(5)T
CD36-AHK2-12.1.5=	Cisco 3600 Enterprise/FW Plus IPSec 3DES Feature Pack 12.1(5)T
CD36-AHL-12.1.5=	Cisco 3600 Enterprise/FW Plus IPSec 56 Feature Pack 12.1(5)T

1 FW means firewall.

Feature Pack Overview

Table 3 identifies each feature pack by product number, CD-ROM label, UNIX and DOS filenames of the images, memory requirements, and RSL installer descriptions.

Table 3 Cisco 3600 Series Feature Pack Image Filenames and Memory Requirements

Product Number	CD-ROM Title	UNIX Image Name	DOS Image Name	Flash Memory	Main Memory	RSL Installer Description
CD36-C-12.1.5=	Cisco 3600 IP Feature Pack Release 12.1(5)T RSL Version 7.10	c3620-i-mz.121-5.T	aaa1180	8 MB	32 MB	Cisco 3620 IOS IP Feature Set 12.1(5)T
		c3620-i-mz.121-3.T	aaa1181	8 MB	32 MB	Cisco 3620 IOS IP Feature Set 12.1(3)T
		c3620-i-mz.121-5	aaa1182	8 MB	24 MB	Cisco 3620 IOS IP Feature Set 12.1(5)
		c3620-i-mz.120-13	aaa1183	8 MB	24 MB	Cisco 3620 IOS IP Feature Set 12.0(13)
		c3640-i-mz.121-5.T	aaa1184	8 MB	32 MB	Cisco 3640 IOS IP Feature Set 12.1(5)T
		c3640-i-mz.121-3.T	aaa1185	8 MB	32 MB	Cisco 3640 IOS IP Feature Set 12.1(3)T
		c3640-i-mz.121-5	aaa1186	8 MB	24 MB	Cisco 3640 IOS IP Feature Set 12.1(5)
		c3640-i-mz.120-13	aaa1187	8 MB	24 MB	Cisco 3640 IOS IP Feature Set 12.0(13)
		c3660-i-mz.121-5.T	aaa1188	8 MB	32 MB	Cisco 3660 IOS IP Feature Set 12.1(5)T
		c3660-i-mz.120-7.XK1	aaa1189	8 MB	32 MB	Cisco 3660 IOS IP Feature Set 12.0(7)XK1
		c3660-i-mz.121-5	aaa1190	8 MB	32 MB	Cisco 3660 IOS IP Feature Set 12.1(5)
CD36-CH-12.1.5=	Cisco 3600 IP/FW Feature Pack Release 12.1(5)T RSL Version 7.10	c3620-io3-mz.121-5.T	aaa1191	8 MB	32 MB	Cisco 3620 IOS IP/FW Feature Set 12.1(5)T
		c3620-io3-mz.121-3.T	aaa1192	8 MB	32 MB	Cisco 3620 IOS IP/FW Feature Set 12.1(3)T
		c3640-io3-mz.121-5.T	aaa1193	8 MB	32 MB	Cisco 3640 IOS IP/FW Feature Set 12.1(5)T
		c3640-io3-mz.121-3.T	aaa1194	8 MB	32 MB	Cisco 3640 IOS IP/FW Feature Set 12.1(3)T
		c3660-io3-mz.121-5.T	aaa1195	8 MB	64 MB	Cisco 3660 IOS IP/FW Feature Set 12.1(5)T
		c3660-io3-mz.120-7.XK1	aaa1196	8 MB	64 MB	Cisco 3660 IOS IP/FW Feature Set 12.0(7)XK1
CD36-CP-12.1.5=	Cisco 3600 IP Plus Feature Pack Release 12.1(5)T RSL Version 7.10	c3620-is-mz.121-5.T	aaa1197	16 MB	48 MB	Cisco 3620 IOS IP Plus Feature Set 12.1(5)T
		c3620-is-mz.121-3.T	aaa1198	16 MB	48 MB	Cisco 3620 IOS IP Plus Feature Set 12.1(3)T
		c3620-is-mz.121-5	aaa1199	8 MB	32 MB	Cisco 3620 IOS IP Plus Feature Set 12.1(5)
		c3620-is-mz.120-13	aaa1200	8 MB	32 MB	Cisco 3620 IOS IP Plus Feature Set 12.0(13)
		c3640-is-mz.121-5.T	aaa1201	16 MB	48 MB	Cisco 3640 IOS IP Plus Feature Set 12.1(5)T
		c3640-is-mz.121-3.T	aaa1202	16 MB	48 MB	Cisco 3640 IOS IP Plus Feature Set 12.1(3)T
		c3640-is-mz.121-5	aaa1203	8 MB	32 MB	Cisco 3640 IOS IP Plus Feature Set 12.1(5)
		c3640-is-mz.120-13	aaa1204	8 MB	32 MB	Cisco 3640 IOS IP Plus Feature Set 12.0(13)
		c3660-is-mz.121-5.T	aaa1205	16 MB	64 MB	Cisco 3660 IOS IP Plus Feature Set 12.1(5)T
		c3660-is-mz.120-7.XK1	aaa1206	16 MB	64 MB	Cisco 3660 IOS IP Plus Feature Set 12.0(7)XK1
		c3660-is-mz.121-5	aaa1207	8 MB	32 MB	Cisco 3660 IOS IP Plus Feature Set 12.1(5)
CD36-CHL-12.1.5=	Cisco 3600 IP/FW Plus IPSec Feature Pack Release 12.1(5)T RSL Version 7.10	c3620-io3s56i-mz.121-5.T	aaa1208	16 MB	64 MB	Cisco 3620 IOS IP/FW Plus IPSec Feature Set 12.1(5)T
		c3620-io3s56i-mz.121-3.T	aaa1209	16 MB	64 MB	Cisco 3620 IOS IP/FW Plus IPSec Feature Set 12.1(3)T
		c3640-io3s56i-mz.121-5.T	aaa1210	16 MB	64 MB	Cisco 3640 IOS IP/FW Plus IPSec Feature Set 12.1(5)T
		c3640-io3s56i-mz.121-3.T	aaa1211	16 MB	64 MB	Cisco 3640 IOS IP/FW Plus IPSec Feature Set 12.1(3)T
		c3660-io3s56i-mz.121-5.T	aaa1212	16 MB	64 MB	Cisco 3660 IOS IP/FW Plus IPSec Feature Set 12.1(5)T
		c3660-io3s56i-mz.120-7.XK1	aaa1213	16 MB	64 MB	Cisco 3660 IOS IP/FW Plus IPSec Feature Set 12.0(7)XK1
CD36-CHK2-12.1.5=	Cisco 3600 IP/FW Plus IPSec 3 DES Feature Pack Release 12.1(5)T RSL Version 7.10	c3620-ik2o3s-mz.121-5.T	aaa1214	16 MB	64 MB	Cisco 3620 IOS IP/FW Plus IPSec 3DES Feature Set 12.1(5)T
		c3620-ik2o3s-mz.121-3.T	aaa1215	16 MB	64 MB	Cisco 3620 IOS IP/FW Plus IPSec 3DES Feature Set 12.1(3)T
		c3640-ik2o3s-mz.121-5.T	aaa1216	16 MB	64 MB	Cisco 3640 IOS IP/FW Plus IPSec 3DES Feature Set 12.1(5)T
		c3640-ik2o3s-mz.121-3.T	aaa1217	16 MB	64 MB	Cisco 3640 IOS IP/FW Plus IPSec 3DES Feature Set 12.1(3)T
		c3660-ik2o3s-mz.121-5.T	aaa1218	16 MB	64 MB	Cisco 3660 IOS IP/FW Plus IPSec 3DES Feature Set 12.1(5)T
		c3660-ik2o3s-mz.120-7.XK1	aaa1219	16 MB	64 MB	Cisco 3660 IOS IP/FW Plus IPSec 3DES Feature Set 12.0(7)XK1
CD36-CK2-12.1.5=	Cisco 3600 IP Plus IPSec 3 DES Feature Pack Release 12.1(5)T RSL Version 7.10	c3620-ik2s-mz.121-5.T	aaa1220	16 MB	48 MB	Cisco 3620 IOS IP Plus IPSec 3DES Feature Set 12.1(5)T
		c3620-ik2s-mz.121-3.T	aaa1221	16 MB	48 MB	Cisco 3620 IOS IP Plus IPSec 3DES Feature Set 12.1(3)T
		c3640-ik2s-mz.121-5.T	aaa1222	16 MB	48 MB	Cisco 3640 IOS IP Plus IPSec 3DES Feature Set 12.1(5)T
		c3640-ik2s-mz.121-3.T	aaa1223	16 MB	48 MB	Cisco 3640 IOS IP Plus IPSec 3DES Feature Set 12.1(3)T
		c3660-ik2s-mz.121-5.T	aaa1224	16 MB	64 MB	Cisco 3660 IOS IP Plus IPSec 3DES Feature Set 12.1(5)T
		c3660-ik2s-mz.120-7.XK1	aaa1225	16 MB	64 MB	Cisco 3660 IOS IP Plus IPSec 3DES Feature Set 12.0(7)XK1
CD36-CL-12.1.5=	Cisco 3600 IP Plus IPSec 56 Feature Pack Release 12.1(5)T RSL Version 7.10	c3620-is56-mz.121-5.T	aaa1226	16 MB	48 MB	Cisco 3620 IOS IP Plus IPSec 56 Feature Set 12.1(5)T
		c3620-is56-mz.121-3.T	aaa1227	16 MB	48 MB	Cisco 3620 IOS IP Plus IPSec 56 Feature Set 12.1(3)T
		c3620-is56-mz.121-5	aaa1228	8 MB	32 MB	Cisco 3620 IOS IP Plus IPSec 56 Feature Set 12.1(5)
		c3620-is56-mz.120-13	aaa1229	8 MB	32 MB	Cisco 3620 IOS IP Plus IPSec 56 Feature Set 12.0(13)
		c3640-is56-mz.121-5.T	aaa1230	16 MB	48 MB	Cisco 3640 IOS IP Plus IPSec 56 Feature Set 12.1(5)T
		c3640-is56-mz.121-3.T	aaa1231	16 MB	48 MB	Cisco 3640 IOS IP Plus IPSec 56 Feature Set 12.1(3)T
		c3640-is56-mz.121-5	aaa1232	8 MB	32 MB	Cisco 3640 IOS IP Plus IPSec 56 Feature Set 12.1(5)
		c3640-is56-mz.120-13	aaa1233	8 MB	32 MB	Cisco 3640 IOS IP Plus IPSec 56 Feature Set 12.0(13)
		c3660-is56-mz.121-5.T	aaa1234	16 MB	64 MB	Cisco 3660 IOS IP Plus IPSec 56 Feature Set 12.1(5)T
		c3660-is56-mz.120-7.XK1	aaa1235	16 MB	64 MB	Cisco 3660 IOS IP Plus IPSec 56 Feature Set 12.0(7)XK1
		c3660-is56-mz.121-5	aaa1236	8 MB	32 MB	Cisco 3660 IOS IP Plus IPSec 56 Feature Set 12.1(5)
CD36-B-12.1.5=	Cisco 3600 IP/IPX/AT/DEC Feature Pack Release 12.1(5)T RSL Version 7.10	c3620-d-mz.121-5.T	aaa1237	8 MB	32 MB	Cisco 3620 IOS IP/IPX/AT Feature Set 12.1(5)T
		c3620-d-mz.121-3.T	aaa1238	8 MB	32 MB	Cisco 3620 IOS IP/IPX/AT Feature Set 12.1(3)T
		c3620-d-mz.121-5	aaa1239	8 MB	24 MB	Cisco 3620 IOS IP/IPX/AT Feature Set 12.1(5)
		c3620-d-mz.120-13	aaa1240	8 MB	24 MB	Cisco 3620 IOS IP/IPX/AT Feature Set 12.0(13)
		c3640-d-mz.121-5.T	aaa1241	8 MB	32 MB	Cisco 3640 IOS IP/IPX/AT Feature Set 12.1(5)T
		c3640-d-mz.121-3.T	aaa1242	8 MB	32 MB	Cisco 3640 IOS IP/IPX/AT Feature Set 12.1(3)T
		c3640-d-mz.121-5	aaa1243	8 MB	24 MB	Cisco 3640 IOS IP/IPX/AT Feature Set 12.1(5)
		c3640-d-mz.120-13	aaa1244	8 MB	24 MB	Cisco 3640 IOS IP/IPX/AT Feature Set 12.0(13)
		c3660-d-mz.121-5.T	aaa1245	8 MB	64 MB	Cisco 3660 IOS IP/IPX/AT Feature Set 12.1(5)T
		c3660-d-mz.120-7.XK1	aaa1246	8 MB	64 MB	Cisco 3660 IOS IP/IPX/AT Feature Set 12.0(7)XK1
		c3660-d-mz.121-5	aaa1247	8 MB	32 MB	Cisco 3660 IOS IP/IPX/AT Feature Set 12.1(5)
CD36-BP-12.1.5=	Cisco 3600 IP/IPX/AT/DEC Plus Feature Pack Release 12.1(5)T RSL Version 7.10	c3620-ds-mz.121-5.T	aaa1248	16 MB	48 MB	Cisco 3620 IOS IP/IPX/AT Plus Feature Set 12.1(5)T
		c3620-ds-mz.121-3.T	aaa1249	16 MB	48 MB	Cisco 3620 IOS IP/IPX/AT Plus Feature Set 12.1(3)T
		c3620-ds-mz.121-5	aaa1250	16 MB	32 MB	Cisco 3620 IOS IP/IPX/AT Plus Feature Set 12.1(5)
		c3620-ds-mz.120-13	aaa1251	16 MB	32 MB	Cisco 3620 IOS IP/IPX/AT Plus Feature Set 12.0(13)
		c3640-ds-mz.121-5.T	aaa1252	16 MB	48 MB	Cisco 3640 IOS IP/IPX/AT Plus Feature Set 12.1(5)T
		c3640-ds-mz.121-3.T	aaa1253	16 MB	48 MB	Cisco 3640 IOS IP/IPX/AT Plus Feature Set 12.1(3)T
		c3640-ds-mz.121-5	aaa1254	16 MB	32 MB	Cisco 3640 IOS IP/IPX/AT Plus Feature Set 12.1(5)
		c3640-ds-mz.120-13	aaa1255	16 MB	32 MB	Cisco 3640 IOS IP/IPX/AT Plus Feature Set 12.0(13)
		c3660-ds-mz.121-5.T	aaa1256	16 MB	64 MB	Cisco 3660 IOS IP/IPX/AT Plus Feature Set 12.1(5)T
		c3660-ds-mz.120-7.XK1	aaa1257	16 MB	64 MB	Cisco 3660 IOS IP/IPX/AT Plus Feature Set 12.0(7)XK1
		c3660-ds-mz.121-5	aaa1258	16 MB	32 MB	Cisco 3660 IOS IP/IPX/AT Plus Feature Set 12.1(5)
CD36-BHP-12.1.5=	Cisco 3600 IP/IPX/AT/DEC/FW Plus Feature Pack Release 12.1(5)T RSL Version 7.10	c3620-do3s-mz.121-5.T	aaa1259	16 MB	64 MB	Cisco 3620 IOS IP/IPX/AT/FW Plus Feature Set 12.1(5)T
		c3620-do3s-mz.121-3.T	aaa1260	16 MB	64 MB	Cisco 3620 IOS IP/IPX/AT/FW Plus Feature Set 12.1(3)T
		c3640-do3s-mz.121-5.T	aaa1261	16 MB	64 MB	Cisco 3640 IOS IP/IPX/AT/FW Plus Feature Set 12.1(5)T
		c3640-do3s-mz.121-3.T	aaa1262	16 MB	64 MB	Cisco 3640 IOS IP/IPX/AT/FW Plus Feature Set 12.1(3)T
		c3660-do3s-mz.121-5.T	aaa1263	16 MB	64 MB	Cisco 3660 IOS IP/IPX/AT/FW Plus Feature Set 12.1(5)T
		c3660-do3s-mz.120-7.XK1	aaa1264	16 MB	64 MB	Cisco 3660 IOS IP/IPX/AT/FW Plus Feature Set 12.0(7)XK1
CD36-AP-12.1.5=	Cisco 3600 Enterprise Plus Feature Pack Release 12.1(5)T RSL Version 7.10	c3620-js-mz.121-5.T	aaa1265	16 MB	64 MB	Cisco 3620 IOS Enterprise Plus Feature Set 12.1(5)T
		c3620-js-mz.121-3.T	aaa1266	16 MB	64 MB	Cisco 3620 IOS Enterprise Plus Feature Set 12.1(3)T
		c3620-js-mz.121-5	aaa1267	16 MB	48 MB	Cisco 3620 IOS Enterprise Plus Feature Set 12.1(5)
		c3620-js-mz.120-13	aaa1268	16 MB	48 MB	Cisco 3620 IOS Enterprise Plus Feature Set 12.0(13)
		c3640-js-mz.121-5.T	aaa1269	16 MB	64 MB	Cisco 3640 IOS Enterprise Plus Feature Set 12.1(5)T
		c3640-js-mz.121-3.T	aaa1270	16 MB	64 MB	Cisco 3640 IOS Enterprise Plus Feature Set 12.1(3)T
		c3640-js-mz.121-5	aaa1271	16 MB	48 MB	Cisco 3640 IOS Enterprise Plus Feature Set 12.1(5)
		c3640-js-mz.120-13	aaa1272	16 MB	48 MB	Cisco 3640 IOS Enterprise Plus Feature Set 12.0(13)
		c3660-js-mz.121-5.T	aaa1273	16 MB	64 MB	Cisco 3660 IOS Enterprise Plus Feature Set 12.1(5)T
		c3660-js-mz.120-7.XK1	aaa1274	16 MB	64 MB	Cisco 3660 IOS Enterprise Plus Feature Set 12.0(7)XK1
		c3660-js-mz.121-5	aaa1275	16 MB	64 MB	Cisco 3660 IOS Enterprise Plus Feature Set 12.1(5)
CD36-AL-12.1.5=	Cisco 3600 Enterprise Plus IPSec 56 Feature Pack Release 12.1(5)T RSL Version 7.10	c3620-js56i-mz.121-5.T	aaa1276	16 MB	64 MB	Cisco 3620 IOS Enterprise Plus IPSec 56 Feature Set 12.1(5)T
		c3620-js56i-mz.121-3.T	aaa1277	16 MB	64 MB	Cisco 3620 IOS Enterprise Plus IPSec 56 Feature Set 12.1(3)T
		c3620-js56i-mz.121-5	aaa1278	16 MB	48 MB	Cisco 3620 IOS Enterprise Plus IPSec 56 Feature Set 12.1(5)
		c3620-js56i-mz.120-13	aaa1279	16 MB	48 MB	Cisco 3620 IOS Enterprise Plus IPSec 56 Feature Set 12.0(13)
		c3640-js56i-mz.121-5.T	aaa1280	16 MB	64 MB	Cisco 3640 IOS Enterprise Plus IPSec 56 Feature Set 12.1(5)T
		c3640-js56i-mz.121-3.T	aaa1281	16 MB	64 MB	Cisco 3640 IOS Enterprise Plus IPSec 56 Feature Set 12.1(3)T
		c3640-js56i-mz.121-5	aaa1282	16 MB	48 MB	Cisco 3640 IOS Enterprise Plus IPSec 56 Feature Set 12.1(5)
		c3640-js56i-mz.120-13	aaa1283	16 MB	48 MB	Cisco 3640 IOS Enterprise Plus IPSec 56 Feature Set 12.0(13)
		c3660-js56i-mz.121-5.T	aaa1284	16 MB	64 MB	Cisco 3660 IOS Enterprise Plus IPSec 56 Feature Set 12.1(5)T
		c3660-js56i-mz.120-7.XK1	aaa1285	16 MB	64 MB	Cisco 3660 IOS Enterprise Plus IPSec 56 Feature Set 12.0(7)XK1
		c3660-js56i-mz.121-5	aaa1286	16 MB	64 MB	Cisco 3660 IOS Enterprise Plus IPSec 56 Feature Set 12.1(5)
CD36-AHK2-12.1.5=	Cisco 3600 Enterprise/FW Plus IPSec 3DES Feature Pack Release 12.1(5)T RSL Version 7.10	c3620-jk2o3s-mz.121-5.T	aaa1287	16 MB	64 MB	Cisco 3620 IOS Enterprise/FW Plus IPSec 3DES Feature Set 12.1(5)T
		c3620-jk2o3s-mz.121-3.T	aaa1288	16 MB	64 MB	Cisco 3620 IOS Enterprise/FW Plus IPSec 3DES Feature Set 12.1(3)T
		c3640-jk2o3s-mz.121-5.T	aaa1289	16 MB	64 MB	Cisco 3640 IOS Enterprise/FW Plus IPSec 3DES Feature Set 12.1(5)T
		c3640-jk2o3s-mz.121-3.T	aaa1290	16 MB	64 MB	Cisco 3640 IOS Enterprise/FW Plus IPSec 3DES Feature Set 12.1(3)T
		c3660-jk2o3s-mz.121-5.T	aaa1291	16 MB	64 MB	Cisco 3660 IOS Enterprise/FW Plus IPSec 3DES Feature Set 12.1(5)T
		c3660-jk2o3s-mz.120-7.XK1	aaa1292	16 MB	64 MB	Cisco 3660 IOS Enterprise/FW Plus IPSec 3DES Feature Set 12.0(7)XK1
CD36-AHL-12.1.5=	Cisco 3600 Enterprise/FW Plus IPSec 56 Feature Pack Release 12.1(5)T RSL Version 7.10	c3620-jo3s56i-mz.121-5.T	aaa1293	16 MB	64 MB	Cisco 3620 IOS Enterprise/FW Plus IPSec 56 Feature Set 12.1(5)T
		c3620-jo3s56i-mz.121-3.T	aaa1294	16 MB	64 MB	Cisco 3620 IOS Enterprise/FW Plus IPSec 56 Feature Set 12.1(3)T
		c3640-jo3s56i-mz.121-5.T	aaa1295	16 MB	64 MB	Cisco 3640 IOS Enterprise/FW Plus IPSec 56 Feature Set 12.1(5)T
		c3640-jo3s56i-mz.121-3.T	aaa1296	16 MB	64 MB	Cisco 3640 IOS Enterprise/FW Plus IPSec 56 Feature Set 12.1(3)T
		c3660-jo3s56i-mz.121-5.T	aaa1297	16 MB	64 MB	Cisco 3660 IOS Enterprise/FW Plus IPSec 56 Feature Set 12.1(5)T
		c3660-jo3s56i-mz.120-7.XK1	aaa1298	16 MB	64 MB	Cisco 3660 IOS Enterprise/FW Plus IPSec 56 Feature Set 12.0(7)XK1

Features by Feature Set

Cisco IOS software is packaged as feature sets (or images), each containing a subset of Cisco IOS features. Some feature sets are identified by the following conventions:

Plus—Value-added feature set with additional features.
Plus IPSec 56—Value-added feature set with additional features, including 56-bit Data Encryption Standard (DES) data encryption.
Plus IPSec 3DES—Value-added feature set with additional features, including Triple DES 168-bit data encryption.

Table 4, Table 5, Table 6, and Table 7 list features supported by Cisco 3600 series routers in each Cisco IOS Release 12.1(5)T feature set:

Table 4 lists features for Cisco 3620 and Cisco 3640 routers in IP feature sets.
Table 5 lists features for Cisco 3620 and Cisco 3640 routers in Enterprise feature sets.
Table 6 lists features for Cisco 3661 and Cisco 3662 routers in IP feature sets.
Table 7 lists features for Cisco 3661 and Cisco 3662 routers in Enterprise sets.

These tables use the following conventions:

Yes—The feature is supported in the feature set.
No—The feature is not supported in the feature set.
First—If this feature was introduced in Cisco IOS Release 12.1 T, the release that introduced it. For example, (1) means the feature was introduced in 12.1(1)T. If this entry is blank, the feature was included in the initial base release.

Note The tables list only selected features. They are not a complete list of all features in each image.

Table 4 Feature List by Feature Set for Cisco 3620 and Cisco 3640 Routers, IP Images

Feature	First	Feature Set
Feature	First	IP	IP/FW	IP Plus	IP/FW Plus IPSec 56	IP/FW Plus IPSec 3DES	IP Plus IPSec 3DES¹	IP Plus IPSec 56	IP/IPX/ AT/DEC	IP/IPX/ AT/DEC Plus	IP/IPX/ AT/DEC/ FW Plus
New Features in 12.1(5)T
AutoInstall Using DHCP for LAN Interfaces	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
CEF Switching for Routed Bridge Encapsulation²	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Class Based Ethernet CoS Matching and Marking (802.1p)³	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Class Based Policer for the DiffServ AF PHB	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Class-Based Quality of Service Management Information Base	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Closed User Group Selection Facility Suppress Option	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Configurable per-VC Hold Queue Support for ATM Adapters	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
DES/3DES VPN Encryption AIM for 2600/3600	(5)	No	No	No	Yes	Yes	Yes	Yes	No	No	No
DiffServ Compliant WRED	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Frame Relay Fragmentation with Hardware Compression	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
IGMP Version 3	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Inter-Autonomous Systems MPLS VPN Support⁴	(5)	No	No	No	No	No	No	No	No	No	No
Interface Index Persistence	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Interface Range Specification	(5)
Interworking Signaling Enhancements for H.323 and SIP VoIP	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
IP DSCP Marking for Frame-Relay PVC	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IP over a CLNS Tunnel	(5)	No	No	No	No	No	No	No	No	No	No
ISDN Progress Indicator Support for SIP Using using 183 Session Protocol	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
L2TP Tunnel Management Enhancements	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
L2TP Tunnel Switching	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Leased Line Support for 2600/3600 Analog Modems 3600 Analog Modems NM-16AM and NM-8AM	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
MSDP MIB	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
NAT—Enhanced H.225/H.245 Forwarding Engine	(5)	No	Yes	No	Yes	Yes	No	No	No	No	Yes
NAT—Support for NetMeeting Directory (Internet Locator Service - ILS)	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
NAT—Support of H.323 v2 Call Signaling (FastConnect)	(5)	No	Yes	No	Yes	Yes	No	No	No	No	Yes
NAT—Support of IP Phone to Cisco Call Manager	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Network-Based Application Recognition	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
NTP MIB	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Parser Cache	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PIM Dense Mode State Refresh	(5)
PPPoE Over IEEE 802.1Q VLANs	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
PPPoE RADIUS Port Identification	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Router-Port Group Management Protocol	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
RSVP Support for Frame Relay	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SDLC SNRM Timer and Window Size Enhancements	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
V.110 Support for Digital Modems	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
VIC-2BRI-NT/TE, MC3810-BVM4- NT/TE	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
VoIP Call Admission Control Using RSVP	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Connectivity
Bidirectional PIM	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Common Open Service (COPS) for RSVP	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Layer 2 Tunnel Protocol (L2TP)		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
L2TP Dial Out		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
RIP Enhancements		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SNMP version 3		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IBM Support
DLSw+ Enhanced Load Balancing		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
DLSw+ Ethernet Redundancy		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
DLSw+ Peer Clusters		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
DLSw+ RSVP Bandwidth Reservation		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
SNA Switching Services		No	No	No	No	No	No	No	No	No	No
Token Ring Interswitch Link		Yes	No	Yes	Yes	No	Yes	Yes	Yes	Yes	No
IP/IPX Routing
OSPF Flooding Reduction	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PGM Host	(1)	No	No	No	No	No	No	No	No	No	No
Service Assurance Agent Enhancements	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Airline Product Set Enhancements	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Asynchronous Serial Traffic over UDP		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Easy IP Phase 2, DHCP Server		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Flow-based WRED		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IP RTP Priority		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IS-IS Multiarea Support		No	No	No	No	No	No	No	No	No	No
Multilayer Switching for IP Multicast		No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Multilayer Switching for IPX		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
OSPF Packet Pacing		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PGM Router Assist		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Service Assurance Agent (formerly Response Time Reporter)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Web Cache Communications Protocol V2 (WCCPv2)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IP Multicast
Source Specific Multicast	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Management
Circuit Interface Identification MIB	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Event MIB	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Individual SNMP Trap Support	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SNMP Support for IOS vLAN Subinterfaces	(3)	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
CNS Client for Cisco IOS (IPSec Policy Agent II)		No	No	No	No	No	No	No	No	No	No
ISDN MIB RFC 2127		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Multicast Routing Monitor		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Network Director Forwarding Agent		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Process MIB		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Subnetwork Bandwidth Manager		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Quality of Service
RSVP Support for LLQ	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
CLI String Search		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Express RTP and TCP Header Compression		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IP to ATM Class of Service		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Security
Secure Shell Version 1 Integrated Client	(3)	No	No	No	Yes	Yes	Yes	Yes	No	No	No
Wildcard Pre-Shared Key Enhancement	(1)	No	No	No	Yes	Yes	Yes	Yes	No	No	No
IKE Shared Secret Using AAA Server	(1)	No	No	No	Yes	Yes	Yes	Yes	No	No	No
IKE Extended Authentication	(1)	No	No	No	Yes	Yes	Yes	Yes	No	No	No
Secure Shell (SSH) Version 1	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
AAA Server Group Deadtimer	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
AAA Broadcast Accounting	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Cisco Secure Integrated Software		No	Yes	No	Yes	Yes	No	No	No	No	Yes
IOS Firewall Feature Set		No	Yes	No	Yes	Yes	No	No	No	No	Yes
IOS Firewall Feature Set Enhancements		No	Yes	No	Yes	Yes	No	No	No	No	Yes
Switching
Bridging between IEEE 802.1Q vLANs	(3)	No	No	No	No	No	No	No	No	No	No
CEF Support for IP Routing between IEEE 802.1Q vLANs	(3)	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Cisco IOS STP Enhancements		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Voice and Multimedia
Caller ID on 2600, 3600, and MC3810	(3)	No	No	Yes	Yes	Yes	Yes	No	No	Yes	Yes
Multicast Hoot and Holler Conferencing over IP	(3)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
PSTN Fallback	(3)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Transparent Common Channel Signaling	(3)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Trunk Conditioning for FRF.11 and Cisco Trunks	(3)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
T1/E1 Voice PRI Q.931, R2, T-CCS, WAN/Voice, E1 CAS and RAI	(3)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
T.38 Fax Relay for VoIP H.323	(3)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Gateway-to- Gatekeeper Billing Redundancy	(1)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Ecosystem Gatekeeper Interoperability Enhancements	(1)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Ecosystem Gatekeeper Interoperability Enhancements	(2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Gatekeeper-to- Gatekeeper Redundancy and Load Sharing	(2)	No	No	No	No	No	No	No	No	No	No
H.323 Version 2, Phase 2	(1)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
H.323 Support for Virtual Interfaces	(2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Session Initiation Protocol (SIP)	(1)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Dial Peer Enhancements	(1), (2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Asynchronous Rotary Line Queuing	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Answer Supervision Reporting	(1)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Configurable Timers in H.225	(2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Voice Busyout Enhancements	(2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Voice over Frame Relay Configuration Updates (FRF.11 and FRF.12)	(2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
QSIG Protocol Support	(2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Voice over ATM	(2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Simple Gateway Control Protocol (SGCP)	(2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
1- and 2-Port T1/E1 Multiflex VWICs		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
BRI Voice over IP:VIC-2BRI- S/T-TE		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Busyout Monitor		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Digital T1 Packet Voice Trunk Network Modules		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Gateway Support for Alternate Gatekeeper		No	No	No	No	No	No	No	No	No	No
H.235 Accounting and Security Enhancements for Cisco Gateways		No	No	No	No	No	No	No	No	No	No
H.323 Version 2		No	No	No	No	No	No	No	No	No	No
H.323 Multizone Enhancements		No	No	No	No	No	No	No	No	No	No
Interactive Voice Response for Cisco Access		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Voice over Frame Relay Enhancements (FRF.11 and FRF.12)		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
WAN Services
PPP Over ATM SVC	(3)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Frame Relay Switching Enhancements: Shaping and Policing	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Frame Relay PVC Interface Priority Queuing	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Low Latency Queuing for Frame Relay	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Settlement for Packet Telephony	(1)	No	No	No	Yes	Yes	Yes	Yes	No	No	No
ISDN Network Side for ETSI Net5 PRI	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PPP over Ethernet	(1)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
ATM T3/E3 NM	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Annex-G (X.25 over Frame Relay)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ATM OC-3 NM		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
ATM LANE FSSR Protocol		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Debit Card for Packet Telephony		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
DNS-Based X.25 Routing		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Frame Relay End-to-End Keepalive		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Interface MIB for ATM Subinterfaces		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
IOS IEEE 802.1Q Support		No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Dynamic Multiple Encaps for Dial-in over ISDN		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ISDN Dynamic Multiple Encaps for Dial-in with Frame Relay Support		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ISDN LAPB-TA		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Mobile IP		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Modem over ISDN BRI⁵		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
MPLS Traffic Engineering		No	No	No	No	No	No	No	No	No	No
Multicast Source Discovery Protocol (MSDP)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Multiport T1/E1 ATM Network Module with Inverse Multiplexing over ATM		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Packet Telephony Settlement		No	No	No	No	No	No	No	No	No	No
PPP Over Frame Relay		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Time-Based Access Lists		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
X.25 Closed User Groups		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
X.25 Load Balancing		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
X.25 Switch Local Acknowledgment		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes

1This image was introduced in Release 12.0(2)T.

2 Cisco 3640 router only.

3Cisco 3640 router only.

4Cisco 3620 router only.

5Cisco 3640 router only.

Table 5 Feature List by Feature Set for Cisco 3620 and Cisco 3640 Routers, Enterprise Images

Feature	First	Feature Set
Feature	First	Enterprise Plus	Enterprise Plus IPSec 56	Enterprise/FW Plus IPSec 3DES	Enterprise/FW Plus IPSec 56
New Features in 12.1(5)T
AutoInstall Using DHCP for LAN Interfaces	(5)	Yes	Yes	Yes	Yes
CEF Switching for Routed Bridge Encapsulation¹	(5)	Yes	Yes	Yes	Yes
Class Based Ethernet CoS Matching and Marking (802.1p)²	(5)	Yes	Yes	Yes	Yes
Class Based Policer for the DiffServ AF PHB	(5)	Yes	Yes	Yes	Yes
Class-Based Quality of Service Management Information Base	(5)	Yes	Yes	Yes	Yes
Closed User Group Selection Facility Suppress Option	(5)	Yes	Yes	Yes	Yes
Configurable per-VC Hold Queue Support for ATM Adapters	(5)	Yes	Yes	Yes	Yes
DES/3DES VPN Encryption AIM for 2600/3600	(5)	No	Yes	Yes	Yes
DiffServ Compliant WRED	(5)	Yes	Yes	Yes	Yes
Frame Relay Fragmentation with Hardware Compression	(5)	Yes	Yes	Yes	Yes
IGMP Version 3	(5)	Yes	Yes	Yes	Yes
Inter-Autonomous Systems MPLS VPN Support³	(5)	Yes	Yes	Yes	Yes
Interface Index Persistence	(5)	Yes	Yes	Yes	Yes
Interface Range Specification	(5)
Interworking Signaling Enhancements for H.323 and SIP VoIP	(5)	Yes	Yes	Yes	Yes
IP DSCP Marking for Frame-Relay PVC	(5)	Yes	Yes	Yes	Yes
IP over a CLNS Tunnel	(5)	Yes	Yes	Yes	Yes
ISDN Progress Indicator Support for SIP Using using 183 Session Protocol	(5)	Yes	Yes	Yes	Yes
L2TP Tunnel Management Enhancements	(5)	Yes	Yes	Yes	Yes
L2TP Tunnel Switching	(5)	Yes	Yes	Yes	Yes
Leased Line Support for 2600/3600 Analog Modems 3600 Analog Modems NM-16AM and NM-8AM	(5)	Yes	Yes	Yes	Yes
MSDP MIB	(5)	Yes	Yes	Yes	Yes
NAT—Enhanced H.225/H.245 Forwarding Engine	(5)	Yes	Yes	Yes	Yes
NAT—Support for NetMeeting Directory (Internet Locator Service - ILS)	(5)	Yes	Yes	Yes	Yes
NAT—Support of H.323 v2 Call Signaling (FastConnect)	(5)	Yes	Yes	Yes	Yes
NAT—Support of IP Phone to Cisco Call Manager	(5)	Yes	Yes	Yes	Yes
Network-Based Application Recognition	(5)	Yes	Yes	Yes	Yes
NTP MIB	(5)	Yes	Yes	Yes	Yes
Parser Cache	(5)	Yes	Yes	Yes	Yes
PIM Dense Mode State Refresh	(5)	Yes	Yes	Yes	Yes
PPPoE Over IEEE 802.1Q VLANs	(5)	Yes	Yes	Yes	Yes
PPPoE RADIUS Port Identification	(5)	Yes	Yes	Yes	Yes
RADIUS Attribute 66 (Tunnel-Client-Endpoint)	(5)
Router-Port Group Management Protocol	(5)	Yes	Yes	Yes	Yes
RSVP Support for Frame Relay	(5)	Yes	Yes	Yes	Yes
SDLC SNRM Timer and Window Size Enhancements	(5)	Yes	Yes	Yes	Yes
V.110 Support for Digital Modems	(5)	Yes	Yes	Yes	Yes
VIC-2BRI-NT/TE, MC3810-BVM4-NT/TE	(5)	Yes	Yes	Yes	Yes
VoIP Call Admission Control using RSVP	(5)	Yes	Yes	Yes	Yes
Connectivity
Bidirectional PIM	(2)	Yes	Yes	Yes	Yes
Common Open Service (COPS) for RSVP	(2)	Yes	Yes	Yes	Yes
Layer 2 Tunnel Protocol (L2TP)		Yes	Yes	Yes	Yes
RIP Enhancements		Yes	Yes	Yes	Yes
SNMP version 3		Yes	Yes	Yes	Yes
IBM Support
DLSw+ Enhanced Load Balancing		Yes	Yes	Yes	Yes
DLSw+ Ethernet Redundancy		Yes	Yes	Yes	Yes
DLSw+ Peer Group Clusters		Yes	Yes	Yes	Yes
DLSw+ RSVP Bandwidth Reservation		Yes	Yes	Yes	Yes
SNA Switching Services		No	No	No	No
Token Ring Interswitch Link		Yes	Yes	Yes	Yes
IP/IPX Routing
OSPF Flooding Reduction	(2)	Yes	Yes	Yes	Yes
PGM Host	(1)	Yes	Yes	Yes	Yes
Service Assurance Agent Enhancements	(1)	Yes	Yes	Yes	Yes
Airline Product Set Enhancements	(2)	Yes	Yes	Yes	Yes
Airline Product Set Enhancements		Yes	Yes	Yes	Yes
Asynchronous Serial Traffic over UDP		Yes	Yes	Yes	Yes
Easy IP Phase 2, DHCP Server		Yes	Yes	Yes	Yes
IP RTP Priority		Yes	Yes	Yes	Yes
Flow-based WRED		Yes	Yes	Yes	Yes
IS-IS Multiarea Support		Yes	Yes	Yes	Yes
Multilayer Switching for IP Multicast		Yes	Yes	Yes	Yes
Multilayer Switching for IPX		Yes	Yes	Yes	Yes
OSPF Packet Pacing		Yes	Yes	Yes	Yes
PGM Router Assist		Yes	Yes	Yes	Yes
Service Assurance Agent (formerly Response Time Reporter)		Yes	Yes	Yes	Yes
Web Cache Communications Protocol V2 (WCCPv2)		Yes	Yes	Yes	Yes
IP Multicast
Source Specific Multicast	(3)	Yes	Yes	Yes	Yes
Management
Circuit Interface Identification MIB	(3)	Yes	Yes	Yes	Yes
Event MIB	(3)	Yes	Yes	Yes	Yes
Individual SNMP Trap Support	(3)	Yes	Yes	Yes	Yes
SNMP Support for IOS vLAN Subinterfaces	(3)	Yes	Yes	Yes	Yes
CNS Client for Cisco IOS (IPSec Policy Agent II)		Yes	Yes	Yes	Yes
ISDN MIB RFC 2127		Yes	Yes	Yes	Yes
Multicast Routing Monitor		Yes	Yes	Yes	Yes
Network Director Forwarding Agent		Yes	Yes	Yes	Yes
Process MIB		Yes	Yes	Yes	Yes
Subnetwork Bandwidth Manager		Yes	Yes	Yes	Yes
Quality of Service
RSVP Support for LLQ	(3)	Yes		Yes	Yes
CLI String Search		Yes	Yes	Yes	Yes
Express RTP and TCP Header Compression		Yes	Yes	Yes	Yes
IP to ATM Class of Service		Yes	Yes	Yes	Yes
Security
Secure Shell Version 1 Integrated Client	(3)	No	Yes	Yes	Yes
Wildcard Pre-Shared Key Enhancement	(1)	No	Yes	Yes	Yes
IKE Shared Secret Using AAA Server	(1)	No	Yes	Yes	Yes
IKE Extended Authentication	(1)	No	Yes	Yes	Yes
Secure Shell (SSH) Version 1	(1)	Yes	Yes	Yes	Yes
AAA Server Group Deadtimer	(2)	Yes	Yes	Yes	Yes
AAA Broadcast Accounting	(1)	Yes	Yes	Yes	Yes
IOS Firewall Feature Set Enhancements		No	No	Yes	Yes
Switching
Bridging between IEEE 802.1Q vLANs	(3)	Yes	Yes	Yes	Yes
CEF Support for IP Routing between IEEE 802.1Q vLANs	(3)	Yes	Yes	Yes	Yes
Cisco IOS STP Enhancements		Yes	Yes	Yes	Yes
Voice and Multimedia
Caller ID on 2600, 3600 and MC3810	(3)	Yes	Yes	Yes	Yes
Multicast Hoot and Holler Conferencing over IP	(3)	Yes	Yes	Yes	Yes
PSTN Fallback	(3)	Yes	Yes	Yes	Yes
Transparent Common Channel Signaling	(3)	Yes	Yes	Yes	Yes
Trunk Conditioning for FRF.11 and Cisco Trunks	(3)	Yes	Yes	Yes	Yes
T1/E1 Voice PRI Q.931, R2, T-CCS, WAN/Voice, E1 CAS and RAI	(3)	Yes	Yes	Yes	Yes
T.38 Fax Relay for VoIP H.323	(3)	Yes	Yes	Yes	Yes
Gateway-to- Gatekeeper Billing Redundancy	(1)	Yes	Yes	Yes	Yes
Ecosystem Gatekeeper Interoperability Enhancements	(1)	Yes	Yes	Yes	Yes
Ecosystem Gatekeeper Interoperability Enhancements	(2)	Yes	Yes	Yes	Yes
Gatekeeper-to- Gatekeeper Redundancy and Load Sharing	(2)	No	No	No	No
H.323 Version 2, Phase 2	(1)	Yes	Yes	Yes	Yes
H.323 Support for Virtual Interfaces	(2)	Yes	Yes	Yes	Yes
Session Initiation Protocol (SIP)	(1)	Yes	Yes	Yes	Yes
Dial Peer Enhancements	(1), (2)	Yes	Yes	Yes	Yes
Asynchronous Rotary Line Queuing	(1)	Yes	Yes	Yes	Yes
Answer Supervision Reporting	(1)	Yes	Yes	Yes	Yes
Configurable Timers in H.225	(2)	Yes	Yes	Yes	Yes
Voice Busyout Enhancements	(2)	Yes	Yes	Yes	Yes
Voice over Frame Relay Configuration Updates (FRF.11 and FRF.12)	(2)	Yes	Yes	Yes	Yes
QSIG Protocol Support	(2)	Yes	Yes	Yes	Yes
Voice over ATM	(2)	Yes	Yes	Yes	Yes
Simple Gateway Control Protocol (SGCP)	(2)	Yes	Yes	Yes	Yes
1- and 2-Port T1/E1 Multiflex VWICs		Yes	Yes	Yes	Yes
BRI Voice over IP: VIC-2BRI-S/T-TE		Yes	Yes	Yes	Yes
Busyout Monitor		Yes	Yes	Yes	Yes
Digital T1 Packet Voice Trunk Network Modules		Yes	Yes	Yes	Yes
Gateway Support for Alternate Gatekeeper		No	No	No	No
H.235 Accounting and Security Enhancements for Cisco Gateways		No	No	No	No
H.323 Version 2		No	No	No	No
H.323 Multizone Enhancements		No	No	No	No
Interactive Voice Response for Cisco Access		Yes	Yes	Yes	Yes
Voice Over Frame Relay Enhancements (FRF.11 and FRF.12)		Yes	Yes	Yes	Yes
WAN Services
Frame Relay ELMI Address Registration	(3)	Yes	Yes	Yes	Yes
PPP over ATM SVC	(3)	Yes	Yes	Yes	Yes
Frame Relay PVC Interface Priority Queuing	(2)	Yes	Yes	Yes	Yes
Low Latency Queuing for Frame Relay	(2)	Yes	Yes	Yes	Yes
Settlement for Packet Telephony	(1)	No	Yes	Yes	Yes
ISDN Network Side for ETSI Net5 PRI	(1)	Yes	Yes	Yes	Yes
PPP over Ethernet	(1)	Yes	Yes	Yes	Yes
ATM T3/E3 NM	(2)	Yes	Yes	Yes	Yes
Annex-G (X.25 over Frame Relay)		Yes	Yes	Yes	Yes
ATM OC-3 NM		Yes	Yes	Yes	Yes
ATM LANE FSSR Protocol		Yes	Yes	Yes	Yes
Debit Card for Packet Telephony		Yes	Yes	Yes	Yes
DNS-Based X.25 Routing		Yes	Yes	Yes	Yes
Frame Relay End-to-End Keepalive		Yes	Yes	Yes	Yes
Interface MIB for ATM Subinterfaces		Yes	Yes	Yes	Yes
IOS IEEE 802.1Q Support		Yes	Yes	Yes	Yes
Dynamic Multiple Encaps for Dial-in over ISDN		Yes	Yes	Yes	Yes
ISDN Dynamic Multiple Encaps for Dial-in with Frame Relay Support		Yes	Yes	Yes	Yes
ISDN LAPB-TA		Yes	Yes	Yes	Yes
Mobile IP		Yes	Yes	Yes	Yes
Modem over ISDN BRI⁴		Yes	Yes	Yes	Yes
MPLS Traffic Engineering		Yes	Yes	Yes	Yes
Multicast Source Discovery Protocol (MSDP)		Yes	Yes	Yes	Yes
Multiport T1/E1 ATM Network Module with Inverse Multiplexing over ATM		Yes	Yes	Yes	Yes
Packet Telephony Settlement		No	Yes	No	No
PPP over Frame Relay		Yes	Yes	Yes	Yes
Time-Based Access Lists		Yes	Yes	Yes	Yes
X.25 Closed User Groups		Yes	Yes	Yes	Yes
X.25 Load Balancing		Yes	Yes	Yes	Yes
X.25 Switch Local Acknowledgment		Yes	Yes	Yes	Yes

1Cisco 3640 router only.

2Cisco 3640 router only.

3Cisco 3620 router only.

4Cisco 3640 router only.

Table 6 Feature List by Feature Set for Cisco 3661 and Cisco 3662 Routers, IP Images

Feature	First	Feature Set
Feature	First	IP	IP/FW	IP Plus	IP/ FW/ Plus IPSec 56	IP/FW/ Plus IPSec 3DES	IP Plus IPSec 3DES	IP Plus IPSec 56	IP/ IPX/ AT/DEC	IP/ IPX/ AT/DEC Plus	IP/ IPX/ AT/DEC/ FW/ Plus
AutoInstall Using DHCP for LAN Interfaces	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Class-Based Quality of Service Management Information Base	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Closed User Group Selection Facility Suppress Option	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Configurable per ATM-VC Hold Queue Size	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
DES/3DES VPN Encryption AIM for 2600/3600	(5)	No	No	No	Yes	Yes	Yes	Yes	No	No	No
Dial-on-Demand Authentication Enhancements	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
DiffServ Compliant WRED	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Frame Relay Fragmentation with Hardware Compression	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IGMP Version 3	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Inter-Autonomous Systems MPLS VPN Support	(5)	No	No	No	No	No	No	No	No	No	No
Interface Index Persistence	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Interworking Signaling Enhancements for H.323 and SIP VoIP	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
IP DSCP Marking for Frame-Relay PVC	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IP over a CLNS Tunnel	(5)	No	No	No	No	No	No	No	No	No	No
ISDN Progress Indicator Support for SIP Using 183 Session Protocol	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
L2TP Tunnel Management Enhancements	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
L2TP Tunnel Switching	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Leased Line Support for 2600/3600 Analog Modems NM-16AM and NM-8AM	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
MSDP MIB	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
NAT—Enhanced H.225/H.245 Forwarding Engine	(5)	No	No	No	Yes	Yes	No	No	No	No	Yes
NAT—Support for NetMeeting Directory (Internet Locator Service - ILS)	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
NAT—Support of H.323 v2 Call Signaling (FastConnect)	(5)	No	No	No	Yes	Yes	No	No	No	No	Yes
NAT—Support of IP Phone to Cisco Call Manager	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Network-Based Application Recognition	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
NM-1A-OC3MM-1VNM-1A-OC3SM1 and NM-1A-OC3SML-1V	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
NTP MIB	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Parser Cache	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PIM Dense Mode State Refresh	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PPP Over Fast Ethernet 802.1Q	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Router-Port Group Management Protocol	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
RSVP Support for Frame Relay	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SDLC SNRM Timer and Window Size Enhancements	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
UDLR Tunnel ARP and IGMP Proxy	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
V.110 Support for 3600 Digital Modems	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
VIC-2BRI-NT/TE, MC3810-BVM4-NT/TE	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
VoIP Call Admission Control using RSVP	(5)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Connectivity
Bidirectional PIM	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Common Open Service (COPS) for RSVP	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
L2TP Dial Out		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
IBM Support
DLSw+ Ethernet Redundancy		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
SNA Switching Services		No	No	No	No	No	No	No	No	No	No
IP/IPX Routing
OSPF Flooding Reduction	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PGM Host	(1)	No	No	No	No	No	No	No	No	No	No
Service Assurance Agent Enhancements	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Airline Product Set Enhancements	(2)	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Airline Product Set Enhancements		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Asynchronous Serial Traffic over UDP		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IP RTP Priority		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IS-IS Multiarea Support		No	No	No	No	No	No	No	No	No	Yes
Multilayer Switching for IP Multicast		No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Multilayer Switching for IPX		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PGM Router Assist		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Service Assurance Agent (formerly Response Time Reporter)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IP Multicast
Source Specific Multicast	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Management
Circuit Interface Identification MIB	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Event MIB	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Individual SNMP Trap Support	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SNMP Support for IOS vLAN Subinterfaces	(3)	No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
CNS Client for Cisco IOS (IPSec Policy Agent II)		No	No	No	No	No	No	No	No	No	No
Multicast Routing Monitor		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Subnetwork Bandwidth Manager		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Quality of Service
RSVP Support for LLQ	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Class-Based Weighted Fair Queuing		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Express RTP and TCP Header Compression		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IP to ATM Class of Service (CoS)		No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Security
Secure Shell Version 1 Integrated Client	(3)	No	No	No	Yes	Yes	Yes	Yes	No	No	No
Wildcard Pre-Shared Key Enhancement	(1)	No	No	No	Yes	Yes	Yes	Yes	No	No	No
IKE Shared Secret Using AAA Server	(1)	No	No	No	Yes	Yes	Yes	Yes	No	No	No
IKE Extended Authentication	(1)	No	No	No	Yes	Yes	Yes	Yes	No	No	No
Secure Shell (SSH) Version 1	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
AAA Server Group Deadtimer	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
AAA Broadcast Accounting	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Cisco Secure Integrated Software		No	Yes	No	Yes	Yes	No	No	No	No	Yes
Digital T1 Packet Voice Trunk Network Modules		No	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
H.235 Accounting and Security Enhancements for Cisco Gateways		No	No	No	No	No	No	No	No	No	No
Interactive Voice Response for Cisco Access		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Switching
Bridging between IEEE 802.1Q vLANs	(3)	No	No	No	No	No	No	No	No	No	No
Voice
Caller ID on 2600, 3600, and MC3810	(3)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Media Gateway Control Protocol Residential Gateway Support	(3)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Multicast Hoot and Holler Conferencing over IP	(3)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
PSTN Fallback	(3)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Transparent Common Channel Signaling	(3)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Trunk Conditioning for FRF.11 and Cisco Trunks	(3)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
T1/E1 Voice PRI Q.931, R2, T-CCS, WAN/Voice, E1 CAS and RAI	(3)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
T.38 Fax Relay for VoIP H.323	(3)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Gateway-to- Gatekeeper Billing Redundancy	(1)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Ecosystem Gatekeeper Interoperability Enhancements	(1)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Ecosystem Gatekeeper Interoperability Enhancements	(2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Gatekeeper-to- Gatekeeper Redundancy and Load Sharing	(2)	No	No	No	No	No	No	No	No	No	No
H.323 Version 2, Phase 2	(1)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
H.323 Support for Virtual Interfaces	(2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Session Initiation Protocol (SIP)	(1)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Dial Peer Enhancements	(1) (2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Asynchronous Rotary Line Queuing	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Answer Supervision Reporting	(1)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Configurable Timers in H.225	(2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Voice Busyout Enhancements	(2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Voice over Frame Relay Configuration Updates (FRF.11 and FRF.12)	(2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Voice over ATM	(2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
QSIG Protocol Support	(2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Simple Gateway Control Protocol (SGCP)	(2)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
WAN Services
Frame Relay ELMI Address Registration	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PPP over ATM SVC	(3)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Frame Relay Switching Enhancements: Shaping and Policing	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Frame Relay PVC Interface Priority Queuing	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Low Latency Queuing for Frame Relay	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PPP over Ethernet	(1)	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Settlement for Packet Telephony	(1)	No	No	No	Yes	Yes	Yes	Yes	No	No	No
ISDN Network Side for ETSI Net5 PRI	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ATM T3/E3 NM	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ATM OC-3 NM		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
ATM LANE FSSR Protocol		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Debit Card for Packet Telephony		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
DNS for X.25		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Frame Relay End-to-End Keepalive		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Interface MIB for ATM Subinterfaces		No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
ISDN Dynamic Multiple Encaps for Dial-in with Frame Relay Support		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
MPLS Traffic Engineering		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Packet Telephony Settlement		No	No	No	No	No	No	No	No	No	No
X.25 Closed User Groups		No	No	No	No	No	No	No	No	No	No
X.25 Switch Local Acknowledgment		No	No	No	No	No	No	No	No	No	No

Table 7 Feature List by Feature Set for Cisco 3661 and Cisco 3662 Routers, Enterprise Images

Feature	First	Feature Set
Feature	First	Enterprise Plus	Enterprise Plus IPSec 56	Enterprise/FW Plus IPSec 3DES	Enterprise/FW Plus IPSec 56
New Features in 12.1(5)T
AutoInstall Using DHCP for LAN Interfaces	(5)	Yes	Yes	Yes	Yes
Class-Based Quality of Service Management Information Base	(5)	Yes	Yes	Yes	Yes
Closed User Group Selection Facility Suppress Option	(5)	Yes	Yes	Yes	Yes
Configurable per ATM-VC Hold Queue Size	(5)	Yes	Yes	Yes	Yes
DES/3DES VPN Encryption AIM for 2600/3600	(5)	No	Yes	Yes	Yes
DiffServ Compliant WRED	(5)	Yes	Yes	Yes	Yes
Frame Relay Fragmentation with Hardware Compression	(5)	Yes	Yes	Yes	Yes
IGMP Version 3	(5)	Yes	Yes	Yes	Yes
Inter-Autonomous Systems MPLS VPN Support	(5)	Yes	Yes	Yes	Yes
Interface Index Persistence	(5)	Yes	Yes	Yes	Yes
Interworking Signaling Enhancements for H.323 and SIP VoIP	(5)	Yes	Yes	Yes	Yes
IP DSCP Marking for Frame-Relay PVC	(5)	Yes	Yes	Yes	Yes
IP over a CLNS Tunnel	(5)	Yes	Yes	Yes	Yes
ISDN Progress Indicator Support for SIP Using 183 Session Protocol	(5)	Yes	Yes	Yes	Yes
L2TP Tunnel Management Enhancements	(5)	Yes	Yes	Yes	Yes
L2TP Tunnel Switching	(5)	Yes	Yes	Yes	Yes
Leased Line Support for 2600/3600 Analog Modems NM-16AM and NM-8AM	(5)	Yes	Yes	Yes	Yes
MSDP MIB	(5)	Yes	Yes	Yes	Yes
NAT—Enhanced H.225/H.245 Forwarding Engine	(5)	Yes	Yes	Yes	Yes
NAT—Support for NetMeeting Directory (Internet Locator Service - ILS)	(5)	Yes	Yes	Yes	Yes
NAT—Support of H.323 v2 Call Signaling (FastConnect)	(5)	Yes	Yes	Yes	Yes
NAT—Support of IP Phone to Cisco Call Manager	(5)	Yes	Yes	Yes	Yes
Network-Based Application Recognition	(5)	Yes	Yes	Yes	Yes
NM-1A-OC3MM-1V NM-1A-OC3SM1 and NM-1A-OC3SML-1V	(5)	Yes	Yes	Yes	Yes
NTP MIB	(5)	Yes	Yes	Yes	Yes
Parser Cache	(5)	Yes	Yes	Yes	Yes
PIM Dense Mode State Refresh	(5)	Yes	Yes	Yes	Yes
PPP Over Fast Ethernet 802.1Q	(5)	Yes	Yes	Yes	Yes
Router-Port Group Management Protocol	(5)	Yes	Yes	Yes	Yes
RSVP Support for Frame Relay	(5)	Yes	Yes	Yes	Yes
SDLC SNRM Timer and Window Size Enhancements	(5)	Yes	Yes	Yes	Yes
UDLR Tunnel ARP and IGMP Proxy	(5)	Yes	Yes	Yes	Yes
UDLR Tunnels and IGMP Proxy	(5)	Yes	Yes	Yes	Yes
V.110 Support for 3600 Digital Modems	(5)	Yes	Yes	Yes	Yes
VIC-2BRI-NT/TE, MC3810-BVM4-NT/TE	(5)	Yes	Yes	Yes	Yes
VoIP Call Admission Control using RSVP	(5)	Yes	Yes	Yes	Yes
Connectivity
Bidirectional PIM	(2)	Yes	Yes	Yes	Yes
Common Open Service (COPS) for RSVP	(2)	Yes	Yes	Yes	Yes
L2TP Dial Out		Yes	Yes	Yes	Yes
IBM Support
DLSw+ Ethernet Redundancy		Yes	Yes	Yes	Yes
SNA Switching Services		No	No	No	No
IP/IPX Routing
OSPF Flooding Reduction	(2)	Yes	Yes	Yes	Yes
PGM Host	(1)	Yes	Yes	Yes	Yes
Service Assurance Agent Enhancements	(1)	Yes	Yes	Yes	Yes
Airline Product Set Enhancements	(2)	Yes	Yes	Yes	Yes
Airline Product Set Enhancements		Yes	Yes	Yes	Yes
Asynchronous Serial Traffic over UDP		Yes	Yes	Yes	Yes
IP RTP Priority		Yes	Yes	Yes	Yes
IS-IS Multiarea Support		Yes	Yes	Yes	Yes
Multilayer Switching for IP Multicast		Yes	Yes	Yes	Yes
Multilayer Switching for IPX		Yes	Yes	Yes	Yes
PGM Router Assist		Yes	Yes	Yes	Yes
Service Assurance Agent (formerly Response Time Reporter)		Yes	Yes	Yes	Yes
IP Multicast
Source Specific Multicast	(3)	Yes	Yes	Yes	Yes
Management
Circuit Interface Identification MIB	(3)	Yes	Yes	Yes	Yes
Event MIB	(3)	Yes	Yes	Yes	Yes
Individual SNMP Trap Support	(3)	Yes	Yes	Yes	Yes
SNMP Support for IOS vLAN Subinterfaces	(3)	Yes	Yes	Yes	Yes
CNS Client for Cisco IOS (IPSec Policy Agent II)		Yes	Yes	Yes	Yes
Multicast Routing Monitor		Yes	Yes	Yes	Yes
Subnetwork Bandwidth Manager		Yes	Yes	Yes	Yes
Quality of Service
RSVP Support for LLQ	(3)	Yes	Yes	Yes	Yes
Class-Based Weighted Fair Queuing		Yes	Yes	Yes	Yes
Express RTP and TCP Header Compression		Yes	Yes	Yes	Yes
IP to ATM Class of Service (CoS)		Yes	Yes	Yes	Yes
Security
Secure Shell Version 1 Integrated Client	(3)	No	Yes	Yes	Yes
Wildcard Pre-Shared Key Enhancement	(1)	No	Yes	Yes	Yes
IKE Shared Secret Using AAA Server	(1)	No	Yes	Yes	Yes
IKE Extended Authentication	(1)	No	Yes	Yes	Yes
Secure Shell (SSH) Version 1	(1)	Yes	Yes	Yes	Yes
AAA Server Group Deadtimer	(2)	Yes	Yes	Yes	Yes
AAA Broadcast Accounting	(1)	Yes	Yes	Yes	Yes
Cisco Secure Integrated Software		No		Yes	Yes
Switching
Bridging between IEEE 802.1Q vLANs	(3)	Yes	Yes	Yes	Yes
CEF Support for IP Routing between IEEE 802.1Q vLANs	(3)	Yes	Yes	Yes	Yes
Voice and Multimedia
Caller ID on 2600, 3600, and MC3810	(3)	Yes	Yes	Yes	Yes
Media Gateway Control Protocol Residential Gateway Support	(3)	Yes	Yes	Yes	Yes
Multicast Hoot and Holler Conferencing over IP	(3)	Yes	Yes	Yes	Yes
PSTN Fallback	(3)	Yes	Yes	Yes	Yes
Transparent Common Channel Signaling	(3)	Yes	Yes	Yes	Yes
Trunk Conditioning for FRF.11 and Cisco Trunks	(3)	Yes	Yes	Yes	Yes
T1/E1 Voice PRI Q.931, R2, T-CCS, WAN/Voice, E1 CAS and RAI	(3)	Yes	Yes	Yes	Yes
T.38 Fax Relay for VoIP H.323	(3)	Yes	Yes	Yes	Yes
Gateway-to- Gatekeeper Billing Redundancy	(1)	Yes	Yes	Yes	Yes
Ecosystem Gatekeeper Interoperability Enhancements	(1)	Yes	Yes	Yes	Yes
Ecosystem Gatekeeper Interoperability Enhancements	(2)	Yes	Yes	Yes	Yes
Gatekeeper-to- Gatekeeper Redundancy and Load Sharing	(2)	No	No	No	No
H.323 Version 2, Phase 2	(1)	Yes	Yes	Yes	Yes
H.323 Support for Virtual Interfaces	(2)	Yes	Yes	Yes	Yes
Session Initiation Protocol (SIP)	(1)	Yes	Yes	Yes	Yes
Dial Peer Enhancements	(1), (2)	Yes	Yes	Yes	Yes
Asynchronous Rotary Line Queuing	(1)	Yes	Yes	Yes	Yes
Answer Supervision Reporting	(1)	Yes	Yes	Yes	Yes
Configurable Timers in H.225	(2)	Yes	Yes	Yes	Yes
Voice Busyout Enhancements	(2)	Yes	Yes	Yes	Yes
Voice over Frame Relay Configuration Updates (FRF.11 and FRF.12)	(2)	Yes	Yes	Yes	Yes
QSIG Protocol Support	(2)	Yes	Yes	Yes	Yes
Voice over ATM	(2)	Yes	Yes	Yes	Yes
Simple Gateway Control Protocol (SGCP)	(2)	Yes	Yes	Yes	Yes
Busyout Monitor		Yes	Yes	Yes	Yes
Digital T1 Packet Voice Trunk Network Modules		Yes	Yes	Yes	Yes
Gateway Support for Alternate Gatekeeper		No	No	No	No
H.235 Accounting and Security Enhancements for Cisco Gateways		No	No	No	No
H.323 Version 2		No	No	No	No
H.323 Multizone Enhancements		No	No	No	No
Interactive Voice Response for Cisco Access		Yes	Yes	Yes	Yes
WAN Services
Frame Relay ELMI Address Registration	(3)	Yes	Yes	Yes	Yes
PPP over ATM SVC	(3)	Yes	Yes	Yes	Yes
Frame Relay Switching Enhancements: Shaping and Policing	(2)	Yes	Yes	Yes	Yes
Frame Relay PVC Interface Priority Queuing	(2)	Yes	Yes	Yes	Yes
Low Latency Queuing for Frame Relay	(2)	Yes	Yes	Yes	Yes
PPP over Ethernet	(1)	Yes	Yes	Yes	Yes
Settlement for Packet Telephony	(1)	No	Yes	Yes	Yes
ISDN Network Side for ETSI Net5 PRI	(1)	Yes	Yes	Yes	Yes
ATM T3/E3 NM	(2)	Yes	Yes	Yes	Yes
ATM LANE FSSR Protocol		Yes	Yes	Yes	Yes
Debit Card for Packet Telephony		Yes	Yes	Yes	Yes
DNS for X.25		Yes	Yes	Yes	Yes
ATM OC-3 NM		Yes	Yes	Yes	Yes
Frame Relay End-to-End Keepalive		Yes	Yes	Yes	Yes
Interface MIB for ATM Subinterfaces		Yes	Yes	Yes	Yes
ISDN Dynamic Multiple Encaps for Dial-in with Frame Relay Support		Yes	Yes	Yes	Yes
MPLS Traffic Engineering		Yes	Yes	Yes	Yes
Multicast Source Discovery Protocol (MSDP)		Yes	Yes	Yes	Yes
Packet Telephony Settlement		No	Yes	No	No
X.25 Closed User Groups		Yes	Yes	Yes	Yes
X.25 Switch Local Acknowledgment		Yes	Yes	Yes	Yes

Installation Notes

This section describes the following topics:

Installing Software Images Using RSL
Alternatives to RSL

Installing Software Images Using RSL

This section describes some solutions to problems you might encounter when installing software images using the RSL. These solutions are additions to the RSL online help.

Recovering From a Connection Error

This installation tip provides a possible recovery solution if you are unable to connect to your access server or router. You can skip this section unless you are experiencing a connection error.

In some cases, you might receive the following error message while connecting to the target access server:

 "Failed to configure the router to enable the Cisco IOS software image and configuration file upload and download operations. You may want to check the router to make sure that the selected interface exists."

If you encounter this message, especially if one of the following situations applies, try increasing the Short Timeout value higher than 25 seconds in the Options dialog box:

You are connecting to an access server that has a large configuration file.
You are connecting to a Cisco AS5200 access server. A Cisco AS5200 requires up to 45 seconds to write a configuration to nonvolatile random-access memory (NVRAM), due to the amount of interfaces that must be checked during this process. Increase the Short Timeout value to 60 seconds.

Note Increasing the Short Timeout value might increase the time it takes for RSL to connect to the target access server.

Restoring the Startup Configuration

In some cases, the RSL is unable to restore the startup configuration. If this happens, take the following steps:

Step 1 Ensure that all cables are properly attached to both the router and the PC.

Step 2 Restart the RSL, and connect by using the Preconfigured router option.

Step 3 When asked if you want to overwrite the existing startup configuration file, choose no.

Step 4 When asked if you want to continue, choose yes.

Step 5 When the router is connected, select Download Router Configuration in the Router Software Loader dialog box.

Step 6 Select the appropriate file, and click the radio button beside Copy configuration to the router nonvolatile memory.

The router should now contain the startup configuration it had before the initial RSL connection. You can now exit the RSL.

Note In the previous situation, the router configuration register (config-register 0xnnnn) is not restored.

Note If you press Ctrl-Alt-Delete to terminate the RSL, the router configuration and configuration register are not restored. However, in this case, the configuration file is not deleted from the PC, so you can restore it using the previous steps, beginning with Step 2.

Installation Tips

The following information about RSL operations can help you with the installation process:

If you have added any static entries to the PC Address Resolution Protocol (ARP) table, one or more of them might be deleted by the RSL. You need to manually re-enter any deleted entries in the PC ARP table.
If the router's running configuration at connection time is not the same as its startup configuration, the exact configuration is not restored. Any changes that you have made since the last time a copy running-config startup-config or write memory command was entered are lost.
The RSL restores the router's startup configuration, but some running configuration commands are not restored. To restore the exact running configuration, reboot the router. The following interface configuration commands are not restored to the running configuration: no shutdown, no ringspeed, and media-type aui.

Alternatives to RSL

RSL is designed to work with a PC running Microsoft Windows 95 and is the recommended method for downloading software to the router. The booklet included with the CD-ROM explains how to perform this simple install process; however, two alternatives are available for installing router software:

Using the console or auxiliary port
Using a TFTP server application

Installing the Router Software Using the Console or Auxiliary Port

This section explains how to use the copy xmodem flash command to install router software from the CD-ROM.

Note The transfer takes place only on the port at which you enter the command. If you download via the console, all console output is discarded for the duration of the transfer. You can only download files to the router; you cannot copy files from the router. Cisco recommends using the auxiliary port for this type of software download. The auxiliary port has hardware flow control and full modem control. In addition, the transfer does not occupy the system console so it is free for other uses.

The following example shows how to use the copy xmodem flash command on a Cisco 3600 series router.

 Router# copy xmodem flash

                                **** WARNING ****

        x/ymodem is a slow transfer protocol limited to the current speed

        settings of the auxiliary/console ports. The use of the auxiliary

        port for this download is strongly recommended.

        During the course of the download no exec input/output will be

        available.

 ---- ******* ----

 Proceed? [confirm] yes

 Use crc block checksumming? [confirm] yes

 Max Retry Count [10]:

 Perform image validation checks? [confirm] yes

 Xmodem download using crc checksumming with image validation

 Continue? [confirm] yes

 Partition Size Used Free Bank-Size  State Copy Mode

 1 4096K 3259K 836K 4096K Read/Write Direct

 2 4096K 0K 4095K 4096K Read/Write Direct

 [Type ?<no> for partition directory; ? for full directory; q to abort]

 Which partition? [default = 1] 2

 System flash directory, partition 2:

 File Length Name/status

 1 68 TESTFILE

 [132 bytes used, 4194172 available, 4194304 total]

 Destination file name? c3600-is-mz.0918

 Erase flash device before writing? [confirm] yes

 Flash contains files. Are you sure you want to erase? [confirm]y

 Copy '' from server

 as 'c3600-is-mz.0918' into Flash WITH erase? [yes/no] yes

 Erasing device... eeeeeeeeeeeeeeee ...erased

 Ready to receive file...........C

 Verifying checksum... OK (0x5DE8)

 Flash device copy took 00:12:06 [hh:mm:ss]

Installing the Router Software Using a TFTP Server Application

Use this TFTP server application method as an alternative to using the RSL to install the router software from the CD-ROM. You can perform this procedure using a PC (running Microsoft Windows 95 or Microsoft Windows 3.1), a Macintosh, or a UNIX system. You can use either the copy tftp flash or copy rcp flash command to download the router software to the router.

First, obtain a TFTP application or a remote copy protocol (rcp) application to set up your computer as a TFTP server or a rcp server. Only use the RSL or the TFTP server included on the feature pack CD-ROM to install the router software if you are using a PC running Windows 95. For other operating systems, a number of TFTP or rcp applications are available from independent software vendors or available as shareware from public sources on the World Wide Web.

Note To use an rcp application, follow the procedure below, substituting "rcp" for "TFTP" and using the copy rcp flash command instead of the copy tftp flash command.

Step 1 Install any TFTP server application on the PC. (A PC application is included on the feature pack CD-ROM for Microsoft Windows 95 only.)

Step 2 Launch the TFTP server application on the PC, usually by double-clicking the application icon or its .exe filename.

Step 3 Set up the PC as a TFTP server by using the TFTP server application setup or configuration facility.

Most TFTP server applications include a setup facility that allows you to specify the PC as a server. For example, from the TFTP menu of one application, you can select Settings to display a panel, and configure the local PC as a server by selecting the Server checkbox.

The TFTP server also allows the selection of a "root" directory. You must select the directory in which the Cisco IOS files reside (for example, d:\cpswinst\images).

Caution Make sure you set up your local PC as a TFTP server. If you overlook this step, you cannot perform the copy procedure. This reminder applies to both TFTP and rcp.

Step 4 Establish a console session from your local PC (which is now configured as a TFTP server) to the Cisco router by using one of these methods:

Connect the PC COM port to the router console port.

This is the recommended method.When you reload the router with the new image in Step 16, you remain connected to the router. (If you use Telnet, you lose connection to the router.)

Establish a Telnet session from the PC to the router.

Caution Make sure your PC is set up to communicate with the 10BASE-T port on the router.

Step 5 Connect your PC Ethernet port to the corresponding router LAN port. Use the 10BASE-T crossover cable to connect to an Ethernet port. Use straight-through cables if you are connecting via a 10BASE-T hub or a 100BASE-T hub.

Note We recommend that you back up the router configuration before upgrading the router software.

Step 6 Enter the following commands to set the configuration register to 0x2101 and reload to the bootstrap image:

 Router# config terminal

 Router(config)# config-reg 0x2101

 Router(config)# end

 Router# reload

Step 7 When asked whether the system configuration has been modified, enter yes:

 # System configuration has been modified. Save? yes

Step 8 If the password prompt appears, enter the password.

 Password: password

Step 9 At the router prompt, enter enable and then the password:

 Router(boot)> enable

 Password: password

Step 10 At the router prompt, enter the following command to copy the new software image from the PC CD-ROM drive to the router:

Router(boot)(config)# copy tftp flash

In the next series of steps, you download the Cisco IOS Release 12.1(5)T image that you want installed on your router.

Step 11 When prompted, enter the IP address of your PC, as in the following example:

Address or name of remote host [255.255.255.255]? 172.11.1.1

This is the IP address of your local PC, not that of the router.

Step 12 When prompted, enter the filename of the Cisco IOS Release 12.1(5)T image to be copied to the router, as in the following example:

 Source file name? aaa1201.bin

This example specifies the DOS image name of the IP feature set for Cisco 3600 series routers (as shown in Table 3 in the "Feature Pack Overview" section).

Step 13 In response to the prompt, enter the destination UNIX image filename, and press Enter.

This is the name of the image file on the router, not the full pathname of the image on the CD-ROM attached to the PC. Refer to Table 3 in the "Feature Pack Overview" section for the UNIX image filename.

 Destination file name [aaa1201.bin]? c3640-is-mz.121-5.T

During the transfer process, the software displays messages indicating that it has accessed the file you have specified and is loading it.

Step 14 Enter yes in response to the prompt asking if you want to erase the existing image copy resident in the router Flash memory before copying the new one.

Erase flash device before writing? [confirm] yes

The entire copying process takes several minutes and differs from network to network.

The exclamation point (!) indicates that the copy process is taking place. Each exclamation point (!) indicates that ten packets have been transferred successfully. A checksum verification of the image occurs after the image is written to Flash memory.

Step 15 Enter the following commands to reset the configuration register to 0x2102.

 Router(boot)(config)# config terminal

 Router(boot)(config)# config-reg 0x2102

 Router(boot)(config)# end

Step 16 Enter the reload command to reload the router:

 Router# reload

After reload is complete, the router should be running the required Cisco IOS image. Use the show version command to verify.

Obtaining Documentation

The following sections provide sources for obtaining documentation from Cisco Systems.

World Wide Web

You can access the most current Cisco documentation on the World Wide Web at the following sites:

Documentation CD-ROM

Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM is updated monthly and may be more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.

Ordering Documentation

Cisco documentation is available in the following ways:

Registered Cisco Direct Customers can order Cisco Product documentation from the Networking Products MarketPlace:

http://www.cisco.com/public/ordsum.html

Registered Cisco.com users can order the Documentation CD-ROM through the online Subscription Store:

http://www.cisco.com/go/subscription

Nonregistered Cisco.com users can order documentation through a local account representative by calling Cisco corporate headquarters (California, USA) at 408 526-7208 or, in North America, by calling 800 553-NETS(6387).

Documentation Feedback

If you are reading Cisco product documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco.

You can e-mail your comments to bug-doc@cisco.com.

To submit your comments by mail, for your convenience many documents contain a response card behind the front cover. Otherwise, you can mail your comments to the following address:

Cisco Systems, Inc.
Document Resource Connection
170 West Tasman Drive
San Jose, CA 95134-9883

We appreciate your comments.

Obtaining Technical Assistance

Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain documentation, troubleshooting tips, and sample configurations from online tools. For Cisco.com registered users, additional troubleshooting tools are available from the TAC website.

Cisco.com

Cisco.com is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information and resources at anytime, from anywhere in the world. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco.

Cisco.com provides a broad range of features and services to help customers and partners streamline business processes and improve productivity. Through Cisco.com, you can find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online technical support, download and test software packages, and order Cisco learning materials and merchandise. Valuable online skill assessment, training, and certification programs are also available.

Customers and partners can self-register on Cisco.com to obtain additional personalized information and services. Registered users can order products, check on the status of an order, access technical support, and view benefits specific to their relationships with Cisco.

To access Cisco.com, go to the following website:

http://www.cisco.com

Technical Assistance Center

The Cisco TAC website is available to all customers who need technical assistance with a Cisco product or technology that is under warranty or covered by a maintenance contract.

Contacting TAC by Using the Cisco TAC Website

If you have a priority level 3 (P3) or priority level 4 (P4) problem, contact TAC by going to the TAC website:

http://www.cisco.com/tac

P3 and P4 level problems are defined as follows:

P3—Your network performance is degraded. Network functionality is noticeably impaired, but most business operations continue.
P4—You need information or assistance on Cisco product capabilities, product installation, or basic product configuration.

In each of the above cases, use the Cisco TAC website to quickly find answers to your questions.

To register for Cisco.com, go to the following website:

http://www.cisco.com/register/

If you cannot resolve your technical issue by using the TAC online resources, Cisco.com registered users can open a case online by using the TAC Case Open tool at the following website:

http://www.cisco.com/tac/caseopen

Contacting TAC by Telephone

If you have a priority level 1(P1) or priority level 2 (P2) problem, contact TAC by telephone and immediately open a case. To obtain a directory of toll-free numbers for your country, go to the following website:

http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml

P1 and P2 level problems are defined as follows:

P1—Your production network is down, causing a critical impact to business operations if service is not restored quickly. No workaround is available.
P2—Your production network is severely degraded, affecting significant aspects of your business operations. No workaround is available.

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