Cisco IOS Software Releases 12.1 T

Table Of Contents

Release Notes for Cisco 3600 Series for Cisco IOS Release 12.1 T

Contents

Introduction

System Requirements

Memory Recommendations

Hardware Supported

Determining the Software Version

Upgrading to a New Software Release

Feature Set Tables

New and Changed Information

New Hardware Features in Cisco IOS Release 12.1(5)T

Advanced Integration Modules (AIM) and Network Module (NM)

VIC-2BRI-NT/TE

New Hardware Features in Cisco IOS Release 12.1(2)T

ATM OC-3 Network Modules with Circuit Emulation

ATM T3 and E3 Network Modules (CSCdr03836)

New Software Features in Cisco IOS Release 12.1(5)T

AutoInstall Using DHCP for LAN Interfaces

CEF Switching for Routed Bridge Encapsulation

Cisco Quality of Service Device Manager 2.0 Support

Class-Based Ethernet CoS Matching and Marking (801.1p & ISL CoS)

Class Based Policer for the DiffServ AF PHB

Class-Based Quality of Service Management Information Database

Closed User Group Selection Facility Suppress Options

Configurable per ATM-VC Hold Queue Size

Closed User Group Selection Facility Suppress Option

DES/3DES VPN Encryption AIM for 2600/3600

DiffServ Compliant WRED

Frame Relay Fragmentation with Hardware Compression

IGMP Version 3

Inter-Autonomous Systems MPLS VPN Support

Interface Index Persistence

Interworking Signaling Enhancements for H.323 and SIP VoIP

IP DSCP Marking for Frame-Relay PVC

IP over a CLNS Tunnel

ISDN Progress Indicator Support for SIP using 183 Session Progress

Leased Line Support for 2600/3600 Analog Modems NM-16AM and NM-8AM

MSDP MIB

NAT—Enhanced H.225/H.245 Forwarding Engine

NAT—Support for NetMeeting Directory (Internet Locator Service - ILS)

NAT—Support of H.323 v2 Call Signaling (FastConnect)

NAT—Support of IP Phone to Cisco Call Manager

Network-Based Application Recognition

NM-1A-OC3MM-1V NM-1A-OC3SM1 and NM-1A-OC3SML-1V

NTP MIB

Parser Cache

PIM Dense Mode State Refresh

PPPoE Over IEEE 802.1Q VLANs

PPPoE RADIUS Port Identification

Router-Port Group Management Protocol

RSVP Support for Frame Relay

SDLC SNRM Timer and Window Size Enhancements

UDLR Tunnel ARP and IGMP Proxy

uOne (Unified Messaging) on Cisco 3660 Multiservice Platforms

V.110 Support for 3600 Digital Modems

VIC-2BRI-NT/TE, MC3810-BVM4-NT/TE

VoIP Call Admission Control using RSVP

New Software Features in Cisco IOS Release 12.1(3a)T1

CEF Support for IP Routing between IEEE 802.1Q vLANs

Multicast Hoot and Holler Conferencing over IP

Source Specific Multicast (SSM)

Trunk Conditioning for FRF.11 and Cisco Trunks

PSTN Fallback

Caller ID

RSVP Support for LLQ

Secure Shell Version 1 Integrated Client

Event MIB

T.38 Fax Relay for VoIP H.323

Transparent Common Channel Signalling (T-CCS)

T1/E1 Voice PRI Q.931, R2, T-CCS, WAN/Voice, E1 CAS and RAI

Frame Relay ELMI Address Registration (CSCdp36027)

Bridging between IEEE 802.1Q vLANs

Enhancements to the Session Initiation Protocol for VoIP

Feature Group D Support on Digital T1/E1 Packet Voice Trunk Network Modules

PPP Over ATM SVC

Configuration through SNMP (CSCdj10821)

Circuit Interface Identification MIB (CSCdp81924)

Individual SNMP Trap Support (CSCdp97172)

SNMP Support for IOS vLAN Subinterfaces (CSCdk25367)

HSRP Support for ICMP Redirect Messages (CSCdp37610)

FXO Supervisory Disconnect Tone (CSCdr29301)

WCCP Redirection on Inbound Interfaces (CSCdr39764)

New Software Features in Cisco IOS Release 12.1(2)T

Bidirectional PIM

QSIG Protocol Support

Frame Relay Switching Enhancements: Shaping and Policing

Voice Busyout Enhancements

Voice over Frame Relay Configuration Updates Using FRF.11 and FRF.12

Airline Product Set Enhancements (CSCdp64339)

Dial Peer Enhancements

H.323 Support for Virtual Interfaces (CSCdp50546)

OSPF Flooding Reduction (CSCdp80470)

AAA Server Group Deadtimer (CSCdp13160)

Configurable Timers in H.225 (CSCdp30190)

Frame Relay PVC Interface Priority Queuing (CSCdm71937)

Low Latency Queuing for Frame Relay (CSCdp27126)

Ecosystem Gatekeeper Interoperability Enhancements: Phase 2 (CSCdp70719)

Gatekeeper to Gatekeeper Redundancy and Load-sharing (CSCdp95233)

COPS for RSVP

Voice Over ATM

SGCP Call Control Protocol Support on the Cisco MC3810 and 3600 series routers

New Software Features in Cisco IOS Release 12.1(1)T

AAA Broadcast Accounting (CSCdk39995)

Answer Supervision Reporting (CSCdp21888)

Asynchronous Rotary Line Queuing

H.323 Version 2, Phase 2

Dial Peer Enhancements

Ecosystem Gatekeeper Interoperability Enhancements (CSCdp48320)

Gateway-to-Gatekeeper Billing Redundancy (CSCdp20240)

IKE Extended Authentication (CSCdm71322)

IKE Shared Secret Using AAA Server (CSCdp05026)

ISDN Network Side for ETSI Net5 PRI (CSCdm34916)

PPP over Ethernet on ATM

Pragmatic General Multicast Host

Service Assurance Agent Enhancements

Session Initiation Protocol (SIP)

Settlement for Packet Telephony with Roaming and Multiple Roots

Wildcard Pre-Shared Key Enhancement (CSCdm599913)

Important Notes

CSCdr91706 and Cisco IOS HTTP Vulnerability

Last Maintenance Release of Cisco IOS Release 12.1 T

Cisco IOS Release 12.1(3)T and 12.1(3a)T1 Voice Issues

Product Number Change

Deprecated MIBs

Caveats

Open Caveats—Cisco IOS Release 12.1(3a)T1

Open Caveats—Cisco IOS Release 12.1(2)T

Related Documentation

Release-Specific Documents

Platform-Specific Documents

Feature Modules

Cisco IOS Software Documentation Set

Documentation Modules

Release 12.1 Documentation Set

Service and Support

Software Configuration Tips on the Cisco Technical Assistance Center Home Page

Obtaining Documentation

World Wide Web

Documentation CD-ROM

Ordering Documentation

Obtaining Technical Assistance

Cisco Connection Online

Technical Assistance Center

Documentation Feedback

Release Notes for Cisco 3600 Series for Cisco IOS Release 12.1 T

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July 25, 2001

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Note You can find the most current Cisco IOS documentation on Cisco Connection Online (CCO). These electronic documents may contain updates and modifications made after the hardcopy documents were printed.

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Note See Important Notes for information concerning Cisco IOS Release 12.1(5)T.

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These release notes for the Cisco 3600 series support Cisco IOS Release 12.1(5)T. These release notes are updated as needed to describe new features, memory requirements, hardware support, software platform deferrals, and changes to the microcode or modem code and related documents.

For a list of the software caveats that apply to Release 12.1(5)T, see Caveats for Cisco IOS Release 12.1 that accompanies these release notes. This caveats document is updated for every maintenance release and is also located on Cisco Connection Online (CCO) and the Documentation CD-ROM.

Use these release notes with Cross-Platform Release Notes for Cisco IOS Release 12.1 located on CCO and the Documentation CD-ROM.

Contents

These release notes describe the following topics:

•Introduction

•System Requirements

•New and Changed Information

•Important Notes

•Caveats

•Related Documentation

•Service and Support

•Obtaining Documentation

•Obtaining Technical Assistance

Introduction

The Cisco 3600 series includes the Cisco 3620, Cisco 3640, and Cisco 3660 routers. As modular solutions, the Cisco 3600 series routers enable corporations to increase dial-up density and take advantage of current and emerging WAN technologies and networking capabilities. The Cisco 3600 series routers are fully supported by Cisco IOS software, which includes dial-up connectivity, LAN-to-LAN routing, data and access security, WAN optimization, and multimedia features.

System Requirements

This section describes the system requirements for Release 12.1(5)T:

•Memory Recommendations

•Hardware Supported

•Determining the Software Version

•Upgrading to a New Software Release

•Feature Set Tables

Memory Recommendations

Table 1 lists recommended minimum memory for the Cisco 3600 series routers.

Table 1 Minimum Memory Recommendations for the Cisco 3600 Series 

Feature Set by Platform		Image Name	Minimum Flash Memory	Minimum DRAM Memory	Runs from
Cisco 3620	IP	c3620-i-mz	8 MB	32 MB	RAM
	IP Plus	c3620-is-mz	16 MB	48 MB	RAM
	IP Plus IPSec 56	c3620-is56i-mz	16 MB	48 MB	RAM
	IP/FW/IDS	c3620-io3-mz	8 MB	32 MB	RAM
	IP/FW/IDS Plus IPSec 56	c3620-io3s56i-mz	16 MB	64 MB	RAM
	IP Plus IPSec 3DES	c3620-ik2s-mz	16 MB	48 MB	RAM
	IP/FW/IDS Plus IPSec 3DES	c3620-ik2o3s-mz	16 MB	64 MB	RAM
	IP/IPX/AT/DEC	c3620-d-mz	8 MB	32 MB	RAM
	IP/IPX/AT/DEC Plus	c3620-ds-mz	16 MB	48 MB	RAM
	IP/IPX/AT/DEC/FW/IDS Plus	c3620-do3s-mz	16 MB	64 MB	RAM
	IP/H.323 Gtkpr Prxy	c3620-ix-mz	8 MB	48 MB	RAM
Cisco 3620 (continued)	Enterprise Plus	c3620-js-mz	16 MB	64 MB	RAM
	Enterprise Plus IPSec 56	c3620-js56i-mz	16 MB	64 MB	RAM
	Enterprise/FW/IDS Plus IPSec 56	c3620-jo3s56i-mz	16 MB	64 MB	RAM
	Enterprise Plus IPSec 3DES	c3620-jk2s-mz	16 MB	64 MB	RAM
	Enterprise/FW/IDS Plus IPSec 3DES	c3620-jk2o3s-mz	16 MB	64 MB	RAM
	Enterprise Plus/H323 MCM	c3620-jsx-mz	16 MB	64 MB	RAM
	Enterprise/SNASw Plus	c3620-a3js-mz	16 MB	64 MB	RAM
	Enterprise/SNASw Plus IPSec 56	c3620-a3js56i-mz	16 MB	64 MB	RAM
	Enterprise/SNASw Plus IPSec 3DES	c3620-a3jk2s-mz	16 MB	64 MB	RAM
Cisco 3640	IP	c3640-i-mz	8 MB	32 MB	RAM
	IP Plus	c3640-is-mz	16 MB	48 MB	RAM
	IP Plus IPSec 56	c3640-is56i-mz	16 MB	48 MB	RAM
	IP/FW/IDS	c3640-io3-mz	8 MB	32 MB	RAM
	IP/FW/IDS Plus IPSec 56	c3640-io3s56i-mz	16 MB	64 MB	RAM
	IP Plus IPSec 3DES	c3640-ik2s-mz	16 MB	48 MB	RAM
	IP/FW/IDS Plus IPSec 3DES	c3640-ik2o3s-mz	16 MB	64 MB	RAM
	IP/IPX/AT/DEC	c3640-d-mz	8 MB	32 MB	RAM
	IP/IPX/AT/DEC Plus	c3640-ds-mz	16 MB	48 MB	RAM
	IP/IPX/AT/DEC/FW/IDS Plus	c3640-do3s-mz	16 MB	64 MB	RAM
	IP/H.323 Gtkpr Prxy	c3640-ix-mz	8 MB	48 MB	RAM
	Enterprise Plus	c3640-js-mz	16 MB	64 MB	RAM
	Enterprise Plus IPSec 56	c3640-js56i-mz	16 MB	64 MB	RAM
	Enterprise/FW/IDS Plus IPSec 56	c3640-jo3s56i-mz	16 MB	64 MB	RAM
	Enterprise Plus IPSec 3DES	c3640-jk2s-mz	16 MB	64 MB	RAM
	Enterprise/FW/IDS Plus IPSec 3DES	c3640-jk2o3s-mz	16 MB	64 MB	RAM
	Enterprise Plus/H323 MCM	c3640-jsx-mz	16 MB	64 MB	RAM
	Enterprise/SNASw Plus	c3640-a3js-mz	16 MB	64 MB	RAM
	Enterprise/SNASw Plus IPSec 56	c3640-a3js56i-mz	16 MB	64 MB	RAM
	Enterprise/SNASw Plus IPSec 3DES	c3640-a3jk2s-mz	16 MB	64 MB	RAM
Cisco 36601	IP	c3660-i-mz	8 MB	32 MB	RAM
	IP Plus	c3660-is-mz	16 MB	64 MB	RAM
	IP Plus/IPSec 56	c3660-is56i-mz	16 MB	64 MB	RAM
	IP/FW/IDS	c3660-io3-mz	8 MB	64 MB	RAM
	IP/FW/IDS Plus IPSec 56	c3660-io3s56i-mz	16 MB	64 MB	RAM
	IP/H.323 Gtkpr Prxy	c3660-ix-mz	8 MB	64 MB	RAM
	IP Plus/IPSec 3DES	c3660-ik2s-mz	16 MB	64 MB	RAM
	IP/FW/IDS Plus IPSec 3DES	c3660-ik2o3s-mz	16 MB	64 MB	RAM
	IP/IPX/AT/DEC	c3660-d-mz	8 MB	64 MB	RAM
	IP/IPX/AT/DEC Plus	c3660-ds-mz	16 MB	64 MB	RAM
	IP/IPX/AT/DEC FW IDS Plus	c3660-do3s-mz	16 MB	64 MB	RAM
	Enterprise/SNASw Plus	c3660-a3js-mz	16 MB	64 MB	RAM
	Enterprise/SNASw Plus/IPSec 56	c3660-a3js56i-mz	16 MB	64 MB	RAM
	Enterprise/SNASw Plus IPSec 3DES	c3660-a3jk2s-mz	16 MB	64 MB	RAM
	Enterprise Plus	c3660-js-mz	16 MB	64 MB	RAM
	Enterprise Plus IPSec 56	c3660-js56i-mz	16 MB	64 MB	RAM
	Enterprise Plus/IPSec 3DES	c3660-jk2s-mz	16 MB	64 MB	RAM
	Enterprise/FW/IDS Plus IPSec 56	c3660-jo3s56i-mz	16 MB	64 MB	RAM
	Enterprise/FW/IDS Plus IPSec 3DES	c3660-jk2o3s-mz	16 MB	64 MB	RAM
	Enterprise Plus/H323 MCM	c3660-jsx-mz	16 MB	96 MB	RAM
	Telco2	c3660-telco-mz	16 MB	64 MB	RAM
	Telco Plus2	c3660-telcoent-mz	16 MB	64 MB	RAM

1 The Cisco 3660 uses SDRAM. 2 The Telco images only run on the 3660-AC-CO and 3660-DC-CO.

Hardware Supported

Cisco IOS Release 12.1(5)T supports the Cisco 3600 series routers:

•Cisco 3620

•Cisco 3640

•Cisco 3660 (3661 and 3662)

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Note For important information about the ATM OC-3 network modules and compatibility with the Cisco 3620 router, please review the field notice on CCO, at http://www.cisco.com/warp/customer/770/51.shtml

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Table 2 lists the supported interfaces for the Cisco 3600 series routers for Cisco IOS Release 12.1(5)T.

Table 2 Supported Interfaces for the Cisco 3600 Series 

Interface, Network Module, or Data Rate		Platforms Supported
Dial Access Network Modules	16- and 32-port asynchronous (NM-16A and NM-32A)	All Cisco 3600 series platforms
	6- to 30-port integrated digital modems network modules (NM-6DM, NM-12-DM, NM-18DM, NM-24DM, NM-40DM)	All Cisco 3600 series platforms
	6 digital modem upgrade (MICA-6MOD)	All Cisco 3600 series platforms
	8- or 16-port integrated analog network modules (NM-8AM and NM16AM)	All Cisco 3600 series platforms
LAN Interfaces	1- and 4-port Ethernet (AUI and 10BaseT, NM-1E and NM-4E)	All Cisco 3600 series platforms
	1-port Fast Ethernet (100BaseTX and 100BaseFX, NM-1FE-TX and NM-1FE-FX)	All Cisco 3600 series platforms
Mixed Media Network Modules	1-port 10/100BaseTX with 1-port channelized/PRI /E1 balanced mode (NM-1FE1CE1B)	All Cisco 3600 series platforms
	1-port 10/100BaseTX with 1-port channelized/PRI/E1 unbalanced mode (NM-1FE1CE1U)	All Cisco 3600 series platforms
	1-port 10/100BaseTX with 1-port channelized/PRI/T1(NM-1FE1CT1)	All Cisco 3600 series platforms
	1-port 10/100BaseTX with 1-port channelized/PRI /T1 with CSU (NM-1FE1CT1-CSU)	All Cisco 3600 series platforms
	1-port 10/100BaseTX with 2-port channelized/PRI/ E1 balanced mode (NM-1FE2CE1B)	All Cisco 3600 series platforms
	1-port 10/100BaseTX with 2-port Channelized/PRI /E1 unbalanced mode (NM-1FE2CE1U)	All Cisco 3600 series platforms
	1-port 10/100BaseTX with 2-port channelized/PRI /T1 (NM-1FE2CT1)	All Cisco 3600 series platforms
	1-port 10/100BaseTX with 2-port channelized/PRI/ T1 with CSU (NM-1FE2CT1-CSU)	All Cisco 3600 series platforms
	1 Ethernet and 2 WAN card slots (NM-1E2W)	All Cisco 3600 series platforms
	1 Ethernet, 1 Token Ring, and 2 WAN card slots (NM-1E1R2W)	All Cisco 3600 series platforms
	2 Ethernet and 2 WAN card slots (NM-2E2W)	All Cisco 3600 series platforms
	1-port fast Ethernet, 1-port Token Ring with 2 WAN card slots (NM-1FE1R2W[=])	All Cisco 3600 series platforms
	1-port fast Ethernet with 2 WAN card slots (NM-1FE2W[=])	All Cisco 3600 series platforms
	2-port fast Ethernet with 2 WAN card slots (NM-2FE2W[=])	All Cisco 3600 series platforms
	2 WAN card slots (NM-2W[=])	All Cisco 3600 series platforms
Multiport T1/E1 ATM Network Modules with Inverse Multiplexing over ATM (IMA)1	4-port T1 ATM network module with IMA (NM-4T1-IMA)	All Cisco 3600 series platforms
	4-port E1 ATM network module with IMA (NM-4E1-IMA)	All Cisco 3600 series platforms
	8-port T1 ATM network module with IMA (NM-8T1-IMA)	All Cisco 3600 series platforms
	8-port E1 ATM network module with IMA (NM-8E1-IMA)	All Cisco 3600 series platforms
Digital T1/E1 Packet Voice Trunk Network Modules and Spare Components	1-port, 24-channel T1 voice/fax module, supports 24 channels of medium-complexity codecs: G.729a/b, G.726, G.711 and fax or 12 channels of G.726, G.729, G.723.1, G.728, G.729a/b, G.711, and fax. Consists of one NM-HDV, two PVDM-12s, and one VWIC-1MFT-T12 . Part number: NM-HDV-1T1-24	All Cisco 3600 series platforms
	1-port, enhanced 24-channel T1 voice/fax module, supports 24 channels of high- and medium-complexity codecs: G.729a/b, G.726, G.729, G.728, G.723.1, G.711, and fax. Consists of one NM-HDV, four PVDM-12s, and one VWIC-1MFT-T12. Part number: NM-HDV-1T1-24E	All Cisco 3600 series platforms
	2-port, 48-channel T1 voice/fax module, supports add/drop multiplexing (drop and insert); 48 channels of medium-complexity codecs: G.729a/b, G.726,G.711, and fax; or 24 channels of G726, G729, G723.1, G.728, G729a/b, G711, and fax. Consists of one NM-HDV, four PVDM-12, and one VWIC-2MFT-T1-DI2. Part number: NM-HDV-2T1-48	All Cisco 3600 series platforms
	1-port, 30-channel E1 voice/fax module, supports 30 channels of G.729a/b, G.726, G.711 and fax or 18 channels of G.726, G.729, G.723.1, G.728, G.729a/b, G.711, and fax. Consists of one NM-HDV, three PVDM-12s, and one VWIC-1MFT-E12. (NM-HDV-1E1-30[=])	All Cisco 3600 series platforms
	1-port, enhanced 30-channel E1 voice/fax module, supports 30 channels of G.729a/b, G.726, G.729, G.728, G.723.1, G.711, and fax. Consists of one NM-HDV, five PVDM-12s, and one VWIC-1MFT-E12. (NM-HDV-1E1-30E[=])	All Cisco 3600 series platforms
	2-port, 60-channel E1 voice/fax module, supports add/drop multiplexing (drop and insert); 60 channels of G.729a/b, G.726, G.711, and fax or 30 channels of G.726, G.729, G.723.1, G.728, G.729a/b, G.711, and fax. Consists of one NM-HDV, five PVDM-12s, and one VWIC-2MFT-E1-D12. (NM-HDV-2E1-60[=])	All Cisco 3600 series platforms
	High-density voice/fax network module spare (NM-HDV)	Digital T1 Packet Voice Trunk Network Modules spare component
	12-channel packet voice DSP module upgrade spare (PVDM-12=)	Digital T1 Packet Voice Trunk Network Modules spare component
Digital T1/E1 Packet Voice Trunk Network Modules and Spare Components (Continued)	1-port RJ-48 multiflex trunk—T1 (VWIC-1MFT-T1)2	Digital T1 Packet Voice Trunk Network Modules spare component
	2-port RJ-48 multiflex trunk—T1 (VWIC-2MFT-T1)2	Digital T1 Packet Voice Trunk Network Modules spare component
	2-port RJ-48 multiflex trunk with drop and insert—T1 (VWIC-2MFT-T1-DI(=))2	Digital T1 Packet Voice Trunk Network Modules spare component
T1/E1 Multiflex Voice/WAN Interface Cards	1-port T1 multiflex trunk interface (VWIC-1MFT-T1)	All Cisco 3600 series platforms
	1-port E1 multiflex trunk interface (VWIC-1MFT-E1)	All Cisco 3600 series platforms
	2-port T1 multiflex trunk interface (VWIC-2MFT-T1)	All Cisco 3600 series platforms
	2-port T1 multiflex trunk interface with drop and insert (VWIC-2MFT-T1-DI)3	All Cisco 3600 series platforms
	2-port E1 multiflex trunk interface with drop and insert (VWIC-2MFT-E1-DI)	All Cisco 3600 series platforms
Voice/Fax Interfaces and Network Modules1	1- and 2-port voice/fax network module (NM-1V and NM-2V)	All Cisco 3600 series platforms
	2-port E&M voice interface card (VIC-2E/M)	All Cisco 3600 series platforms with Voice/Fax network module
	2-port FXO voice interface card (VIC-2FXO, VIC-2FXO-M3, and VIC-2FXO-EU)	All Cisco 3600 series platforms with Voice/Fax network module
	2-port FXS voice interface card	All Cisco 3600 series platforms with Voice/Fax network module
	2-port BRI voice interface card (VIC-2BRI-S/T-TE)	Cisco 3620 and 3640 platforms with Voice/Fax network module
WAN Data Rates	48/56/64 kbps	All Cisco 3600 series platforms
	1.544/2.048 Mbps	All Cisco 3600 series platforms
	Up to 8 Mbps on 4-port serial network module	All Cisco 3600 series platforms
	52 Mbps max using HSSI network module	All Cisco 3600 series platforms
	Up to 100 Mbps on ATM OC3 network modules	All Cisco 3600 series platforms
Network Modules	1- and 2-port channelized T1 modules without CSUs (NM-1CT1 and NM-1CT1)	All Cisco 3600 series platforms
	1- and 2-port channelized T1 network modules with CSUs (NM-1CT1-CSU and NM-2CT1-CSU)	All Cisco 3600 series platforms
	1- and 2-port E1 network modules unbalanced mode NM-1CE1U and NM-2CE1U)	All Cisco 3600 series platforms
	1- and 2-port E1 network modules balanced mode (NM-1CE1B and NM-2CE1B)	All Cisco 3600 series platforms
	1-port ATM-25 network modules (NM-1ATM-25)1	All Cisco 3600 series platforms
	1-port ATM T3 network module (NM-1A-T3)1	All Cisco 3600 series platforms
Network Modules (Continued)	1-port ATM E3 network module (NM-1A-E3)1	All Cisco 3600 series platforms
	1-port high-speed serial Interface (HSSI) network module	All Cisco 3600 series platforms
	4- and 8-port BRI network module with NT1 (NM-4B-U and NM-8B-U)	All Cisco 3600 series platforms
	4- and 8-port BRI network module with S/T interface (NM-4B-S/T and NM-8B-S/T	All Cisco 3600 series platforms
	4- and 8-port synchronous/asynchronous (NM-4A/S and NM-8A/S)	All Cisco 3600 series platforms
	16- and 32-port asynchronous (NM-16A and NM-32A)	All Cisco 3600 series platforms
	4-port serial (NM-4T)	All Cisco 3600 series platforms
	1-port ATM OC-3 network module with multimode fiber (NM-1A-OC3MM)	All Cisco 3600 series platforms
	1-port ATM OC-3 network module with single-mode intermediate reach fiber (NM-1A-OC3SMI)	All Cisco 3600 series platforms
	1-port ATM OC-3 network module with single-mode long reach fiber (NM-1A-OC3SML)	All Cisco 3600 series platforms
	1-port ATM OC-3 multimode network module and circuit emulation service (NM-1A-OC3MM-1V)4	All Cisco 3600 series platforms
	1-port ATM OC-3 single-mode, intermediate reach network module and circuit emulation service (NM-1A-OC3SMI-1V)4	All Cisco 3600 series platforms
	1-port ATM OC-3 single-mode, long reach network module and circuit emulation service (NM-1A-OC3SML-1V)4	All Cisco 3600 series platforms
Other Network Modules	Compression network module (NM-COMPR)	All Cisco 3600 series platforms
	4 E1 data compression Advanced Integration Module (AIM-COMPR4)	All Cisco 3600 series platforms
	Hardware Encryption Network Module	All Cisco 3620 and 3640 series platforms
	Hardware Encryption Advanced Integration Module (AIM)	All Cisco 3660 series platforms
WAN Interface Cards	1-port T1/Fractional T1/DSU/CSU WAN interface card (WIC-1DSU-T1)	All Cisco 3600 series platforms
	1-port T1/Fractional T1 56/64 kbps DSU/CSU WAN interface card (WIC-1DSU-56K4)	All Cisco 3600 series platforms
	1-port ISDN with NT1 WAN interface card (WIC-1B-U)	All Cisco 3600 series platforms
	1-port ISDN WAN interface card (WIC-1B-S/T)	All Cisco 3600 series platforms
	1-port serial WAN interface card (WIC-1T)	All Cisco 3600 series platforms
	2-port serial (WIC-2T[=])5	All Cisco 3600 series platforms
	2-port asynchronous/synchronous (WIC-2A/S[=])	All Cisco 3600 series platforms

1 Requires the Cisco IOS Plus feature sets. 2 See T1/E1 Multiflex Voice/WAN Interface Cards in this table. 3 For Cisco 3660 series, only supported in T1/E1 digital packet voice trunk network modules and new Fast Ethernet mixed media network modules: NM-1FE2W, NM-2FE2W, NM-1FE1R2W, NM-2W. For Cisco 3620 and 3640, supported in T1/E1 digital packet voice trunk network modules or in 1- or 2-port Ethernet and Fast Ethernet network module (NM-1E2W, NM-2E2W, NM-1E1R2W, NM-1FE2W, NM-2FE2W, NM-1FE1R2W, NM-2W) 4 For the Cisco 3660 series only, online insertion and removal (OIR) is now supported in Cisco IOS Release 12.1(5)T. 5 Supported in Fast Ethernet mixed media network modules: NM-1FE2W, NM-2FE2W, NM-1FE1R2W, NM-2W.

Determining the Software Version

To determine the version of Cisco IOS software running on a Cisco 3600 series router, log in to the router and enter the show version EXEC command:

router>show version

Cisco Internetwork Operating System Software

IOS (tm) 3620 Software (c3620-js-mz), Version 12.1(5)T, RELEASE SOFTWARE

Upgrading to a New Software Release

For general information about upgrading to a new software release, see the product bulletin Cisco IOS Upgrade Ordering Instructions on CCO located at:

http://www.cisco.com/warp/public/cc/cisco/mkt/ios/prodlit/957_pp.htm

On CCO at:

Service & Support: Software Center: Cisco IOS Software: Product Bulletins: Software

Feature Set Tables

Cisco IOS software is packaged in feature sets consisting of software images—depending on the platform. Each feature set contains a specific set of Cisco IOS features, as shown in Table 3.

Table 3 Feature Sets Supported by the Cisco 3600 Series 

Feature Set		Feature Set Matrix Term	Software Image	Platforms
IP Standard Feature Sets	IP	•Basic1	c3620-i-mz, c3640-i-m, c3660-i-mz	All Cisco 3600 platforms
	IP Plus	•Plus2	c3620-is-mz, c3640-is-mz, c3660-is-mz	All Cisco 3600 platforms
	IP Plus IPSec 56	•Plus •IPSec 563	c3620-is56i-mz, c3640-is56i-mz, c3660-is56i-mz	All Cisco 3600 platforms
	IP Plus IPSec 3DES	•Plus •IPSec 3DES4	c3620-ik2s-mz, c3640-ik2s-mz, c3660-ik2s-mz	All Cisco 3600 platforms
	IP/FW/IDS Plus IPSec 3DES	•Plus •IPSec 3DES	c3620-ik2o3s-mz, c3620-ik2o3s-mz, c3640-ik2o3s-mz	All Cisco 3600 platforms
	IP/FW/IDS	•Basic	c3620-io3-mz, c3640-io3-mz, c3660-io3-mz	All Cisco 3600 platforms
	IP/FW/IDS Plus IPSec 56	•Plus •IPSec 56	c3620-io3s56i-mz, c3640-io3s56i-mz, c3660-io3s56i-mz	All Cisco 3600 platforms
	IP/H.323 Gtkpr Prxy	•Basic •H323	c3620-ix-mz, c3640-ix-mz, c3660-ix-mz	All Cisco 3600 platforms
Desktop IBM Standard Feature Sets	IP/IPX/AppleTalk/DEC	•Basic	c3620-d-mz, c3640-d-mz, c3660-d-mz	All Cisco 3600 platforms
	IP/IPX/AppleTalk/DEC Plus	•Plus	c3620-ds-mz, c3640-ds-mz, c3660-ds-mz	All Cisco 3600 platforms
	IP/IPX/AppleTalk/DEC/FW/IDS Plus	•Plus	c3620-do3s-mz, c3640-do3s-mz, c3660-do3s-mz	All Cisco 3600 platforms
Enterprise Standard Feature Sets	Enterprise Plus	•Plus	c3620-js-mz, c3640-js-mz, c3660-js-mz	All Cisco 3600 platforms
	Enterprise Plus/H323 MCM	•Plus •H323	c3620-jsx-mz c3640-jsx-mz c3660-jsx-mz	All Cisco 3600 platforms
	Enterprise Plus IPSec 56	•Plus •IPSec 56	c3620-js56i-mz, c3640-js56i-mz, c3660-js56i-mz	All Cisco 3600 platforms
	Enterprise/FW/IDS Plus IPSec 56	•IPSec 56	c3620-jo3s56i-mz, c3640-jo3s56i-mz, c3660-jo3s56i-mz	All Cisco 3600 platforms
	Enterprise Plus IPSec 3DES	•Plus •IPSec 3DES	c3620-jk2s-mz, c3640-jk2s-mz, c3660-jk2s-mz	All Cisco 3600 platforms
	Enterprise/FW/IDS Plus IPSec 3DES	•Plus •IPSec 3DES	c3620-jk2o3s-mz c3640-jk2o3s-mz, c3660-jk2o3s-mz	All Cisco 3600 platforms
Enterprise/SNASw Standard Feature Sets	Enterprise/SNASw Plus	•Plus	c3620-a3js-mz, c3640-a3js-mz, c3660-a3js-mz	All Cisco 3600 platforms
	Enterprise/SNASw Plus IPSec 56	•Plus •IPSec 56	c3620-a3js56i-mz, c3640-a3js56i-mz, c3660-ajs56i-mz	All Cisco 3600 platforms
	Enterprise/SNASw Plus IPSec 3DES	•Plus •IPSec 3DES	c3620-a3jk2s-mz, c3640-a3jk2s-mz, c3660-a3jk2s-mz	All Cisco 3600 platforms
Telco Feature Sets5	IOS Telco Feature Set	•Telco	c3660-telco-mz	Cisco 3660 platform
	IOS Telco Plus Feature Set	•Telco Plus	c3660-telcoent-mz	Cisco 3660 platform

1 This feature set is offered in the basic feature set. 2 This feature set is offered in the Plus feature set. 3 This feature set is offered in the encryption feature sets which consist of IPSec 56-bit (Plus IPSec 56) data encryption feature sets. 4 This feature set is offered in the encryption feature sets which consist of Triple DES (3DES) Encryption data encryption feature sets. 5 For 3662-xC-CO chassis only.

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Caution Cisco IOS images with strong encryption (including, but not limited to 168-bit (3DES) data encryption feature sets) are subject to United States government export controls and have limited distribution. Strong encryption images to be installed outside the United States are likely to require an export license. Customer orders may be denied or subject to delay due to United States government regulations. When applicable, purchaser/user must obtain local import and use authorizations for all encryption strengths. Please contact your sales representative or distributor for more information, or send an e-mail to export@cisco.com.

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Tables 4, 5, 6 and 7 list the features and feature sets supported by the Cisco 3600 series in Cisco IOS Release 12.1(5)T and use the following conventions:

•Yes—The feature is supported in the software image.

•No—The feature is not supported in the software image.

•In—The number in the "In" column indicates the Cisco IOS release in which the feature was introduced. For example, (1) means a feature was introduced in Release 12.1(1)T. If a cell in this column is empty, the feature was included in the initial base release.

---

Note These feature set tables only contain a selected list of features. The tables are not cumulative—nor do they list all the features in each image.

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Table 4 Feature Lists by Feature Sets for the Cisco 3620 and 3640 Routers, Part 1 of 2 

Features	In	Feature Sets
		IP	IP H.323	IP Plus	IP Plus IPSec 56	IP/ FW/ IDS	IP/ FW/IDS Plus IPSec 56	IP Plus IPSec 3DES1	IP/FW/ IDS Plus IPSec 3DES	IP/IPX/ AT/ DEC	IP/ IPX/ AT/ DEC Plus	IP/IPX/AT/ DEC/ FW/ IDS 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	Yes
CEF Switching for Routed Bridge Encapsulation2	(5)	No	No	Yes	Yes	No	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	Yes
Class Based Policer for the DiffServ AF PHB	(5)	Yes	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	Yes
Closed User Group Selection Facility Suppress Option	(5)	Yes	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	Yes
DES/3DES VPN Encryption AIM for 2600/3600	(5)	No	No	No	Yes	No	Yes	Yes	Yes	No	No	No
DiffServ Compliant WRED	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Frame Relay Fragmentation with Hardware Compression	(5)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
IGMP Version 3	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Inter-Autonomous Systems MPLS VPN Support1	(5)	No	No	No	No	No	No	No	No	No	No	No
Interface Index Persistence	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Interworking Signaling Enhancements for H.323 and SIP VoIP	(5)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
IP DSCP Marking for Frame-Relay PVC	(5)	Yes	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	No
ISDN Progress Indicator Support for SIP Using using 183 Session Protocol	(5)	No	No	Yes	Yes	No	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	Yes
MSDP MIB	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
NAT—Enhanced H.225/H.245 Forwarding Engine	(5)	No	No	No	No	Yes	Yes	No	Yes	No	No	Yes
NAT—Support for NetMeeting Directory (Internet Locator Service - ILS)	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
NAT—Support of H.323 v2 Call Signaling (FastConnect)	(5)	No	No	No	No	Yes	Yes	No	Yes	No	No	Yes
NAT—Support of IP Phone to Cisco Call Manager	(5)	Yes	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	Yes
NTP MIB	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Parser Cache	(5)	Yes	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	Yes
PPPoE Over IEEE 802.1Q VLANs	(5)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
PPPoE RADIUS Port Identification	(5)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Router-Port Group Management Protocol	(5)	Yes	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	Yes
SDLC SNRM Timer and Window Size Enhancements	(5)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
UDLR Tunnels and IGMP Proxy4	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
V.110 Support for Digital Modems	(5)	Yes	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	Yes
VoIP Call Admission Control Using RSVP	(5)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Connectivity
Bidirectional PIM	(2)	Yes	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	Yes
Layer 2 Tunnel Protocol (L2TP)		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
L2TP Dial Out		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
RIP Enhancements		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SNMP version 3		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IBM Support
DLSw+ Enhanced Load Balancing		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
DLSw+ Ethernet Redundancy		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
DLSw+ Peer Clusters		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
DLSw+ RSVP Bandwidth Reservation		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
SNA Switching Services		No	No	No	No	No	No	No	No	No	No	No
Token Ring Interswitch Link		Yes	No	Yes	Yes	No	Yes	Yes	No	Yes	Yes	No
IP/IPX Routing
OSPF Flooding Reduction	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PGM Host	(1)	No	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	Yes
Airline Product Set Enhancements	(2)	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Asynchronous Serial Traffic over UDP		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Easy IP Phase 2- DHCP Server		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Flow-based WRED		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IP RTP Priority		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IS-IS Multiarea Support		No	No	No	No	No	No	No	No	No	No	No
Multilayer Switching for IP Multicast		No	No	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes
Multilayer Switching for IPX		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
OSPF Packet Pacing		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PGM Router Assist		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Service Assurance Agent (formerly Response Time Reporter)		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Web Cache Communications Protocol V2 (WCCPv2)		Yes	No	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	Yes
Management
Circuit Interface Identification MIB	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Event MIB	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Individual SNMP Trap Support	(3)	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SNMP Support for IOS vLAN Subinterfaces	(3)	No	No	Yes	Yes	No	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	No
ISDN MIB RFC 2127		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Multicast Routing Monitor		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Network Director Forwarding Agent		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Process MIB		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Subnetwork Bandwidth Manager		Yes	No	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	Yes
CLI String Search		Yes	No	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	Yes
IP to ATM Class of Service		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Security
Secure Shell Version 1 Integrated Client	(3)	No	No	No	No	No	No	Yes	Yes	No	No	No
Wildcard Pre-Shared Key Enhancement	(1)	No	No	No	Yes	No	Yes	Yes	Yes	No	No	No
IKE Shared Secret Using AAA Server	(1)	No	No	No	Yes	No	Yes	Yes	Yes	No	No	No
IKE Extended Authentication	(1)	No	No	No	Yes	No	Yes	Yes	Yes	No	No	No
Secure Shell (SSH) Version 1	(1)	No	No	No	No	No	No	Yes	Yes	No	No	No
AAA Server Group Deadtimer	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
AAA Broadcast Accounting	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Cisco Secure Integrated Software		No	No	No	No	Yes	Yes	No	Yes	No	No	Yes
IOS Firewall Feature Set		No	No	No	No	Yes	Yes	No	Yes	No	No	Yes
IOS Firewall Feature Set Enhancements		No	No	No	No	Yes	Yes	No	Yes	No	No	Yes
Switching
Bridging between IEEE 802.1Q vLANs	(3)	No	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	No	Yes	Yes	Yes	Yes	Yes	Yes
Cisco IOS STP Enhancements		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Voice and Multimedia
Caller ID on 2600, 3600, and MC3810	(3)	No	No	Yes	No	No	Yes	Yes	Yes	No	Yes	Yes
Multicast Hoot and Holler Conferencing over IP	(3)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
PSTN Fallback	(3)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Transparent Common Channel Signaling	(3)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Trunk Conditioning for FRF.11 and Cisco Trunks	(3)	No	No	Yes	Yes	No	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	No	Yes	Yes	Yes	No	Yes	Yes
T.38 Fax Relay for VoIP H.323	(3)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Gateway-to- Gatekeeper Billing Redundancy	(1)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Ecosystem Gatekeeper Interoperability Enhancements	(1)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Ecosystem Gatekeeper Interoperability Enhancements	(2)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Gatekeeper-to- Gatekeeper Redundancy and Load Sharing	(2)	No	Yes	No	No	No	No	No	No	No	No	No
H.323 Version 2, Phase 2	(1)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
H.323 Support for Virtual Interfaces	(2)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Session Initiation Protocol (SIP)	(1)	No	Yes	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Dial Peer Enhancements	(1), (2)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Asynchronous Rotary Line Queuing	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Answer Supervision Reporting	(1)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Configurable Timers in H.225	(2)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Voice Busyout Enhancements	(2)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Voice over Frame Relay Configuration Updates (FRF.11 and FRF.12)	(2)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
QSIG Protocol Support	(2)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Voice over ATM	(2)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Simple Gateway Control Protocol (SGCP)	(2)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
1- and 2-Port T1/E1 Multiflex VWICs		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
BRI Voice over IP:VIC-2BRI- S/T-TE		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Busyout Monitor		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Digital T1 Packet Voice Trunk Network Modules		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Gateway Support for Alternate Gatekeeper		No	Yes	No	No	No	No	No	No	No	No	No
H.235 Accounting and Security Enhancements for Cisco Gateways		No	Yes	No	No	No	No	No	No	No	No	No
H.323 Version 2		No	Yes	No	No	No	No	No	No	No	No	No
H.323 Multizone Enhancements		No	Yes	No	No	No	No	No	No	No	No	No
Interactive Voice Response for Cisco Access		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Voice over Frame Relay Enhancements (FRF.11 and FRF.12)		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
WAN Services
PPP Over ATM SVC	(3)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Frame Relay Switching Enhancements: Shaping and Policing	(2)	Yes	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	Yes
Low Latency Queueing for Frame Relay	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Settlement for Packet Telephony	(1)	No	No	No	Yes	No	Yes	Yes	Yes	No	No	No
ISDN Network Side for ETSI Net5 PRI	(1)	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PPP over Ethernet	(1)	No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
ATM T3/E3 NM	(2)	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Annex-G (X.25 over Frame Relay)		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ATM OC-3 NM		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
ATM LANE FSSR Protocol		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Debit Card for Packet Telephony		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
DNS-Based X.25 Routing		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Frame Relay End-to-End Keepalive		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Interface MIB for ATM Subinterfaces		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
IOS IEEE 802.1Q Support		No	No	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes
Dynamic Multiple Encaps for Dial-in over ISDN		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ISDN Dynamic Multiple Encaps for Dial-in with Frame Relay Support		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ISDN LAPB-TA		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Mobile IP		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Modem over ISDN BRI5		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
MPLS Traffic Engineering		No	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	Yes
Multiport T1/E1 ATM Network Module with Inverse Multiplexing over ATM		No	No	Yes	Yes	No	Yes	Yes	Yes	No	Yes	Yes
Packet Telephony Settlement		No	No	No	No	No	No	No	No	No	No	No
PPP Over Frame Relay		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Time-based Access Lists		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
X.25 Closed User Groups		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
X.25 Load Balancing		Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
X.25 Switch Local Acknowledgment		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes

1 This image was introduced in Release 12.0(2)T. 2 Cisco 3640 routers only. 3 Cisco 3640 routers only. 4 Cisco 3660 routers only. 5 Cisco 3640 and 3660 routers only.

Table 5 Feature Lists by Feature Sets for the Cisco 3620 and 3640 Routers, Part 2 of 2 

Features	In	Feature Sets
		Enter- prise Plus	Enter- prise Plus IPSec 56	Enter- prise/ FW/IDS Plus IPSec 56	Enter- prise Plus IPSec 3DES1	Enter- prise/ FW/IDS Plus IPSec 3DES	Enter- prise/ SNASw Plus	Enter- prise/ SNASw Plus IPSec 56	Enter- prise/ SNASw Plus IPSec 3DES	Enter- prise/ H323 MCM
New Features in 12.1(5)T
AutoInstall Using DHCP for LAN Interfaces	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
CEF Switching for Routed Bridge Encapsulation2	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Class Based Ethernet CoS Matching and Marking (802.1p)3	(5)	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
Class-Based Quality of Service Management Information Base	(5)	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
Configurable per-VC Hold Queue Support for ATM Adapters	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
DES/3DES VPN Encryption AIM for 2600/3600	(5)	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No
DiffServ Compliant WRED	(5)	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
IGMP Version 3	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Inter-Autonomous Systems MPLS VPN Support4	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Interface Index Persistence	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Interworking Signaling Enhancements for H.323 and SIP VoIP	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IP DSCP Marking for Frame-Relay PVC	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IP over a CLNS Tunnel	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ISDN Progress Indicator Support for SIP Using using 183 Session Protocol	(5)	Yes	Yes	Yes	Yes	Yes	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	Yes	Yes	Yes	Yes	Yes
MSDP MIB	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
NAT—Enhanced H.225/H.245 Forwarding Engine	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
NAT—Support for NetMeeting Directory (Internet Locator Service - ILS)	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
NAT—Support of H.323 v2 Call Signaling (FastConnect)	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
NAT—Support of IP Phone to Cisco Call Manager	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Network-Based Application Recognition	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
NTP MIB	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Parser Cache	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PIM Dense Mode State Refresh	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PPPoE Over IEEE 802.1Q VLANs	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PPPoE RADIUS Port Identification	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Router-Port Group Management Protocol	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
RSVP Support for Frame Relay	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SDLC SNRM Timer and Window Size Enhancements	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
UDLR Tunnel ARP and IGMP Proxy5	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
V.110 Support for Digital Modems	(5)	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
VoIP Call Admission Control using RSVP	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Connectivity
Bidirectional PIM	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Common Open Service (COPS) for RSVP	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Layer 2 Tunnel Protocol (L2TP)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
RIP Enhancements		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
SNMP version 3		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
IBM Support
DLSw+ Enhanced Load Balancing		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
DLSw+ Ethernet Redundancy		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
DLSw+ Peer Group Clusters		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
DLSw+ RSVP Bandwidth Reservation		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
SNA Switching Services		No	No	No	No	No	Yes	Yes	Yes	No
Token Ring Interswitch Link		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
IP/IPX Routing
OSPF Flooding Reduction	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
PGM Host	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Service Assurance Agent Enhancements	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Airline Product Set Enhancements	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Airline Product Set Enhancements		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Asynchronous Serial Traffic over UDP		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Easy IP Phase 2-DHCP Server		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
IP RTP Priority		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Flow-based WRED		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
IS-IS Multiarea Support		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Multilayer Switching for IP Multicast		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Multilayer Switching for IPX		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
OSPF Packet Pacing		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
PGM Router Assist		Yes	Yes	Yes	Yes	Yes	No	No	No	No
Service Assurance Agent (formerly Response Time Reporter)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Web Cache Communications Protocol V2 (WCCPv2)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
IP Multicast
Source Specific Multicast	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Management
Circuit Interface Identification MIB	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Event MIB	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Individual SNMP Trap Support	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
SNMP Support for IOS vLAN Subinterfaces	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
CNS Client for Cisco IOS (IPSec Policy Agent II)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
ISDN MIB RFC 2127		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Multicast Routing Monitor		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Network Director Forwarding Agent		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Process MIB		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Subnetwork Bandwidth Manager		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Quality of Service
RSVP Support for LLQ	(3)	Yes		Yes	Yes	Yes	Yes	Yes	Yes	No
CLI String Search		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Express RTP and TCP Header Compression		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
IP to ATM Class of Service		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Security
Secure Shell Version 1 Integrated Client	(3)	No	No	No	Yes	Yes	No	No	Yes	No
Wildcard Pre-Shared Key Enhancement	(1)	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No
IKE Shared Secret Using AAA Server	(1)	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No
IKE Extended Authentication	(1)	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No
Secure Shell (SSH) Version 1	(1)	No	No	No	Yes	Yes	No	No	Yes	No
AAA Server Group Deadtimer	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
AAA Broadcast Accounting	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
IOS Firewall Feature Set Enhancements		No	No	Yes	No	Yes	No	No	No	No
Switching
Bridging between IEEE 802.1Q vLANs	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
CEF Support for IP Routing between IEEE 802.1Q vLANs	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Cisco IOS STP Enhancements		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Voice and Multimedia
Caller ID on 2600, 3600 and MC3810	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Multicast Hoot and Holler Conferencing over IP	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
PSTN Fallback	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Transparent Common Channel Signaling	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Trunk Conditioning for FRF.11 and Cisco Trunks	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
T1/E1 Voice PRI Q.931, R2, T-CCS, WAN/Voice, E1 CAS and RAI	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
T.38 Fax Relay for VoIP H.323	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Gateway-to- Gatekeeper Billing Redundancy	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Ecosystem Gatekeeper Interoperability Enhancements	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Ecosystem Gatekeeper Interoperability Enhancements	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Gatekeeper-to- Gatekeeper Redundancy and Load Sharing	(2)	No	No	No	No	No	No	No	No	No
H.323 Version 2, Phase 2	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
H.323 Support for Virtual Interfaces	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Session Initiation Protocol (SIP)	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Dial Peer Enhancements	(1), (2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Asynchronous Rotary Line Queuing	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Answer Supervision Reporting	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Configurable Timers in H.225	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Voice Busyout Enhancements	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Voice over Frame Relay Configuration Updates (FRF.11 and FRF.12)	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
QSIG Protocol Support	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Voice over ATM	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Simple Gateway Control Protocol (SGCP)	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
1- and 2-Port T1/E1 Multiflex VWICs		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
BRI Voice over IP: VIC-2BRI-S/T-TE		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Busyout Monitor		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Digital T1 Packet Voice Trunk Network Modules		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Gateway Support for Alternate Gatekeeper		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
H.323 Version 2		No	No	No	No	No	No	No	No	No
H.323 Multizone Enhancements		No	No	No	No	No	No	No	No	No
Interactive Voice Response for Cisco Access		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Voice Over Frame Relay Enhancements (FRF.11 and FRF.12)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
WAN Services
Frame Relay ELMI Address Registration	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
PPP over ATM SVC	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Frame Relay PVC Interface Priority Queuing	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Low Latency Queueing for Frame Relay	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Settlement for Packet Telephony	(1)	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No
ISDN Network Side for ETSI Net5 PRI	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
PPP over Ethernet	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
ATM T3/E3 NM	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Annex-G (X.25 over Frame Relay)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
ATM OC-3 NM		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
ATM LANE FSSR Protocol		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Debit Card for Packet Telephony		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
DNS-Based X.25 Routing		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Frame Relay End-to-End Keepalive		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Interface MIB for ATM Subinterfaces		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
IOS IEEE 802.1Q Support		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Dynamic Multiple Encaps for Dial-in over ISDN		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
ISDN Dynamic Multiple Encaps for Dial-in with Frame Relay Support		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
ISDN LAPB-TA		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Mobile IP		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Modem over ISDN BRI6		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
MPLS Traffic Engineering		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Multicast Source Discovery Protocol (MSDP)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Multiport T1/E1 ATM Network Module with Inverse Multiplexing over ATM		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Packet Telephony Settlement		No	Yes	No	No	No	No	No	No	No
PPP over Frame Relay		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
Time-Based Access Lists		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
X.25 Closed User Groups		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
X.25 Load Balancing		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No
X.25 Switch Local Acknowledgment		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No

1 This image was introduced in Cisco IOS Release 12.0(2)T. 2 Cisco 3640 routers only. 3 Cisco 3640 routers only. 4 Cisco 3620 and 3660 routers only. 5 Cisco 3660 routers only. 6 Cisco 3640 and 3660 routers only.

Table 6 Feature Lists by Feature Sets for the Cisco 3661 and 3662 Routers, Part 1 of 2 

Release 12.1(5)T Features	In	Feature Sets
		IP	IP/ FW/ IDS	IP/ FW/ IDS Plus IPSec 56	IP/ H.323	IP Plus	IP Plus IPSec 56	IP/ FW/ IDS Plus IPSec 3DES	IP Plus IPSec 3DES	IP/ IPX/ AT/ DEC	IP/ IPX/ AT/ DEC/ FW/ IDS Plus	IP/ IPX/AT/ DEC Plus	Telco	Telco Plus
AutoInstall Using DHCP for LAN Interfaces	(5)	Yes	Yes	Yes	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	Yes	Yes	Yes
Closed User Group Selection Facility Suppress Option	(5)	Yes	Yes	Yes	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	Yes	Yes	Yes
DES/3DES VPN Encryption AIM for 2600/3600	(5)	No	No	Yes	No	No	Yes	Yes	Yes	No	No	No	No	No
Dial-on-Demand Authentication Enhancements	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
DiffServ Compliant WRED	(5)	Yes	Yes	Yes	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	Yes	No	Yes
IGMP Version 3	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Inter-Autonomous Systems MPLS VPN Support1	(5)	No	No	No	No	No	No	No	No	No	No	No	Yes	Yes
Interface Index Persistence	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Interworking Signaling Enhancements for H.323 and SIP VoIP	(5)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
IP DSCP Marking for Frame-Relay PVC	(5)	Yes	Yes	Yes	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	No	Yes	Yes
ISDN Progress Indicator Support for SIP Using 183 Session Protocol	(5)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	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	Yes	Yes	Yes
MSDP MIB	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
NAT—Enhanced H.225/H.245 Forwarding Engine	(5)	No	No	Yes	No	No	No	Yes	No	No	Yes	No	No	Yes
NAT—Support for NetMeeting Directory (Internet Locator Service - ILS)	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
NAT—Support of H.323 v2 Call Signaling (FastConnect)	(5)	No	No	Yes	No	No	No	Yes	No	No	Yes	No	No	Yes
NAT—Support of IP Phone to Cisco Call Manager	(5)	Yes	Yes	Yes	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	Yes	Yes	Yes
NM-1A-OC3MM-1VNM-1A-OC3SM1 and NM-1A-OC3SML-1V	(5)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes
NTP MIB	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Parser Cache	(5)	Yes	Yes	Yes	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	Yes	Yes	Yes
PPP Over Fast Ethernet 802.1Q	(5)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes
Router-Port Group Management Protocol	(5)	Yes	Yes	Yes	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	Yes	Yes	Yes
SDLC SNRM Timer and Window Size Enhancements	(5)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
UDLR Tunnel ARP and IGMP Proxy2	(5)	Yes	Yes	Yes	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	Yes	Yes	Yes
VIC-2BRI-NT/TE, MC3810-BVM4-NT/TE	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
VoIP Call Admission Control using RSVP	(5)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Connectivity
Bidirectional PIM	(2)	Yes	Yes	Yes	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	Yes	Yes	Yes
L2TP Dial Out		No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes
IBM Support
DLSw+ Ethernet Redundancy		No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
SNA Switching Services		No	No	No	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	Yes	Yes	Yes
PGM Host	(1)	No	No	No	No	No	No	No	No	No	No	No	No	Yes
Service Assurance Agent Enhancements	(1)	Yes	Yes	Yes	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	Yes	Yes	Yes
Airline Product Set Enhancements		Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Asynchronous Serial Traffic over UDP		Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IP RTP Priority		Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IS-IS Multiarea Support		No	No	No	No	No	No	No	No	No	Yes	No	Yes	Yes
Multilayer Switching for IP Multicast		No	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes
Multilayer Switching for IPX		Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes
PGM Router Assist		Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Service Assurance Agent (formerly Response Time Reporter)		Yes	Yes	Yes	No	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	Yes	Yes	Yes
Management
Circuit Interface Identification MIB	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes
Event MIB	(3)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Individual SNMP Trap Support	(3)	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SNMP Support for IOS vLAN Subinterfaces	(3)	No	No	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes
CNS Client for Cisco IOS (IPSec Policy Agent II)		No	No	No	No	No	No	No	No	No	No	No	No	Yes
Multicast Routing Monitor		Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Subnetwork Bandwidth Manager		Yes	Yes	Yes	No	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	Yes	Yes
Class-Based Weighted Fair Queueing		Yes	Yes	Yes	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	Yes	No	No
IP to ATM Class of Service (CoS)		No	No	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No
Security
Secure Shell Version 1 Integrated Client	(3)	No	No	No	No	No	No	Yes	Yes	No	No	No	No	No
Wildcard Pre-Shared Key Enhancement	(1)	No	No	Yes	No	No	Yes	Yes	Yes	No	No	No	No	No
IKE Shared Secret Using AAA Server	(1)	No	No	Yes	No	No	Yes	Yes	Yes	No	No	No	No	No
IKE Extended Authentication	(1)	No	No	Yes	No	No	Yes	Yes	Yes	No	No	No	No	No
Secure Shell (SSH) Version 1	(1)	No	No	No	No	No	No	Yes	Yes	No	No	No	No	No
AAA Server Group Deadtimer	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
AAA Broadcast Accounting	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Cisco Secure Integrated Software		No	Yes	Yes	No	No	No	Yes	No	No	Yes	No	No	No
Digital T1 Packet Voice Trunk Network Modules		No	No	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No
H.235 Accounting and Security Enhancements for Cisco Gateways		No	No	No	Yes	No	No	No	No	No	No	No	No	No
Interactive Voice Response for Cisco Access		No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Switching
Bridging between IEEE 802.1Q vLANs	(3)	No	No	No	No	No	No	No	No	No	No	No	No	Yes
Voice
Caller ID on 2600, 3600, and MC3810	(3)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Media Gateway Control Protocol Residential Gateway Support	(3)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Multicast Hoot and Holler Conferencing over IP	(3)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
PSTN Fallback	(3)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Transparent Common Channel Signaling	(3)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Trunk Conditioning for FRF.11 and Cisco Trunks	(3)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
T1/E1 Voice PRI Q.931, R2, T-CCS, WAN/Voice, E1 CAS and RAI	(3)	No	No	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
T.38 Fax Relay for VoIP H.323	(3)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Gateway-to- Gatekeeper Billing Redundancy	(1)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Ecosystem Gatekeeper Interoperability Enhancements	(1)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Ecosystem Gatekeeper Interoperability Enhancements	(2)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Gatekeeper-to- Gatekeeper Redundancy and Load Sharing	(2)	No	No	No	Yes	No	No	No	No	No	No	No	No	No
H.323 Version 2, Phase 2	(1)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
H.323 Support for Virtual Interfaces	(2)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Session Initiation Protocol (SIP)	(1)	No	No	Yes	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Dial Peer Enhancements	(1) (2)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Asynchronous Rotary Line Queuing	(1)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Answer Supervision Reporting	(1)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Configurable Timers in H.225	(2)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Voice Busyout Enhancements	(2)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Voice over Frame Relay Configuration Updates (FRF.11 and FRF.12)	(2)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Voice over ATM	(2)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
QSIG Protocol Support	(2)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Simple Gateway Control Protocol (SGCP)	(2)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
WAN Services
Frame Relay ELMI Address Registration	(3)	Yes	Yes	Yes		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PPP over ATM SVC	(3)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes
Frame Relay Switching Enhancements: Shaping and Policing	(2)	Yes	Yes	Yes	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	Yes	Yes	Yes
Low Latency Queueing for Frame Relay	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PPP over Ethernet	(1)	No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes
Settlement for Packet Telephony	(1)	No	No	Yes	No	No	Yes	Yes	Yes	No	No	No	No	No
ISDN Network Side for ETSI Net5 PRI	(1)	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ATM T3/E3 NM	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ATM OC-3 NM		No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
ATM LANE FSSR Protocol		No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
Debit Card for Packet Telephony		No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
DNS for X.25		Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Frame Relay End-to-End Keepalive		Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Interface MIB for ATM Subinterfaces		No	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	Yes	No	Yes
ISDN Dynamic Multiple Encaps for Dial-in with Frame Relay Support		Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
MPLS Traffic Engineering		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No
Packet Telephony Settlement		No	No	No	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	No	No	No
X.25 Switch Local Acknowledgment		No	No	No	No	No	No	No	No	No	No	No	No	No

1 Cisco 3620 and 3660 routers only. 2 Cisco 3660 routers only.

Table 7 Feature Lists by Feature Sets for the Cisco 3661 and 3662 Routers, Part 2 of 2 

Features	In	Feature Sets
		Enter- prise Plus	Enter- prise/ FW/IDS Plus IPSec 56	Enter- prise/ FW/ IDS Plus IPSec 3DES	Enter- prise Plus IPSec 56	Enter- prise Plus IPSec 3DES	Enter- prise/ SNASw Plus	Enter- prise/ SNASw Plus IPSec 3DES	Enter- prise/ SNASw Plus IPSec 56
New Features in 12.1(5)T
AutoInstall Using DHCP for LAN Interfaces	(5)	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
Closed User Group Selection Facility Suppress Option	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Configurable per ATM-VC Hold Queue Size	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
DES/3DES VPN Encryption AIM for 2600/3600	(5)	No	Yes	Yes	Yes	Yes	No	Yes	Yes
DiffServ Compliant WRED	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Frame Relay Fragmentation with Hardware Compression	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IGMP Version 3	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Inter-Autonomous Systems MPLS VPN Support1	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Interface Index Persistence	(5)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Interworking Signaling Enhancements for H.323 and SIP VoIP	(5)	Yes	Yes	Yes	Yes	Yes