Release Notes
for the Cisco 2500 Series Routers
for Cisco IOS Release 11.3

December 29, 1997

These release notes describe the new features and significant software components for Cisco IOS Release 11.3 for Cisco 2500 series routers and access servers. For detailed information about the features and caveats in these release notes, refer to the Release Notes for Cisco IOS Release 11.3 publication, which contains features and caveats for all 11.3 platforms. This publication is available on the Documentation CD-ROM and on Cisco Connection Online (CCO), which are described in the section "Online Navigation."

Introduction

These release notes discuss the following topics:

Determining Your Cisco IOS Software Release

To determine which version of Cisco IOS software is running on your Cisco 2500 series router or access server, log in to the router and enter the show version User EXEC command:

router# show version
Cisco Internetwork Operating System Software 
IOS (tm) 2500 Software (C2500-J-L), Version 11.3(1), RELEASE SOFTWARE
Copyright (c) 1986-1997 by cisco Systems, Inc.
Compiled Mon 01-Dec-97 19:44 by richard
Image text-base: 0x030475B4, data-base: 0x00001000
 
ROM: System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE
BOOTFLASH: 3000 Bootstrap Software (IGS-RXBOOT), Version 10.2(8a), RELEASE SOFTWARE (fc1)
 
router uptime is 1 minute
System restarted by reload
System image file is "flash:master/c2500-j-l.113-0.16", booted via flash
 
cisco 2500 (68030) processor (revision D) with 16384K/2048K bytes of memory.
Processor board ID 02438483, with hardware revision 00000000
Bridging software.
X.25 software, Version 3.0.0.
SuperLAT software copyright 1990 by Meridian Technology Corp).
TN3270 Emulation software.
2 Ethernet/IEEE 802.3 interface(s)
2 Serial network interface(s)
32K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read ONLY)
          
Configuration register is 0x0

Cisco 2500 Series Routers and Access Servers

The following Cisco 2500 series routers and access servers are supported by Release 11.3:

Single LAN: Cisco 2501, 2502, 2503, and 2504
Integrated HUBs: Cisco 2505, 2507, and 2516
High Density Serial: Cisco 2520, 2521, 2522, and 2523
Dual LANs: Cisco 2513, 2514, and 2515
Modular Routers: Cisco 2524 and 2525
Access Servers: Cisco AS2509, AS2511, and AS2512

The following Cisco 2500 series access servers are supported by Release 11.3: Cisco AS2509-RJ, AS2511-RJ, and 2509-ET.

Cisco IOS Release 11.3 supports the following platforms: Cisco AS2509-RJ and Cisco AS2511-RJ access servers. Table 1 and Table 2 summarize the interfaces supported for these devices. "Yes" means that a particular data rate or interface is supported. "No" means it is not supported.

**Table 1: LAN Interfaces Supported**
Interface	Cisco 2500 Series
Ethernet (AUI)	Yes
Ethernet (10BaseT)	Yes (2505, 2507, 2516, 2520, 2522, and 2524 only)
4-Mbps Token Ring	Yes
16-Mbps Token Ring	Yes
Synchronous Serial	Yes

**Table 2: WAN Data Rates and Interfaces Supported**
	Cisco 2500 Series
Data Rate
48/56/64 kbps	Yes
1.544/2.048 Mbps	Yes
Interface
EIA/TIA-232	Yes
X.21	Yes
V.35	Yes
EIA/TIA-449	Yes
EIA-530	Yes
Serial, synchronous and asynchronous	Yes
ISDN BRI S/T	Yes (2503, 2504, 2516, 2520, 2521, 2522, 2523, 2524, and 2525 only)
ISDN BRI U	Yes (2524 and 2525)

Cisco AS2509-RJ and Cisco AS2511-RJ Access Servers

The Cisco AS2509-RJ and Cisco AS2511-RJ access servers connect asynchronous serial devices to LANs and WANs. The access servers combine the functions of a terminal server, protocol translator, and a router, and perform both synchronous and asynchronous routing of supported protocols.

These access servers provide the following interfaces and ports:

8 (Cisco AS2509-RJ) or 16 (Cisco AS2511-RJ) asynchronous serial ports for connection to modems, terminals, or other asynchronous devices
One Ethernet attachment unit interface (AUI) port for connection to a LAN
One synchronous serial port for connection to a WAN
One EIA/TIA-232 console port for connection to a console terminal
One EIA/TIA-232 auxiliary port for connection to a terminal or modem

Fixed FRAD Series

Cisco Systems is introducing three new models in the Cisco 2500 series that are preconfigured as Frame Relay access devices (FRADs). The devices include the Cisco 2501FRAD-FX, Cisco 2501LANFRAD-FX, and Cisco 2502LANFRAD-FX. These new "Fixed FRADs" complement the existing Cisco 2500 serial and LAN FRAD models and offer a new entry point for cost-effective Frame Relay applications. The Fixed FRADs are ideal for branch office and remote office connectivity of legacy/ System Network Architecture (SNA) devices or cost-effective Frame Relay access.

Mission-specific routers are entry-level routers that are based on standard Cisco 2500 series hardware. However, mission-specific routers contain less memory than standard models and run reduced software images designed for CFRAD, LAN FRAD, and ISDN applications. The Cisco 2500 series fixed FRAD platforms are a variation of the Mission-specific CFRAD and LAN FRAD platforms. However, they are not upgradeable to routers like the mission-specific FRAD models.

The Cisco Fixed FRADs have been modified so that they do not execute non-FRAD Cisco IOS software images. This includes the images designed for other Cisco 2500 series systems. The Fixed FRAD routers cannot be upgraded to run feature sets that typically run on Cisco 2500 series routers.

The Fixed FRAD series includes three fixed-configuration hardware models with the following features:

Cisco 2501FRAD-FX--Two high-speed synchronous serial and one low-speed asynchronous serial interface
Cisco 2501LANFRAD-FX--One Ethernet, two high-speed synchronous serial, and one low-speed asynchronous serial interface
Cisco 2502LANFRAD-FX--One Token Ring, two high-speed synchronous serial, and one low-speed asynchronous serial interface

Generated SysObjectID's

The Generated SysObjectID's feature generates a unique sysObjectID for each Cisco 2500 series router and its derived partner product. For example, the sysObjectID values for a Cisco 2511, a partner's 2511, and another partner's 2511 are each different. The sysObjectID Simple Network Management Protocol (SNMP) MIB object is used to identify the device to be managed and make application-specific decisions. In some network management programs, this object determines which graphical element or name to display for a device.

Selective Packet Discard (SPD)

When in severe overload conditions, routers that cannot keep up with the incoming packet stream must drop packets. If no intelligence is applied to choosing which ones to discard, this impacts the stability of routing protocols. This feature applies some simple choices to selectively discard packets likely to be unimportant for routing and interface stability. SPD is enabled by default; there are no commands or configuration tasks required.

Books	Chapter Topics
· Configuration Fundamentals Configuration Guide · Configuration Fundamentals Command Reference	Configuration Fundamentals Overview Cisco IOS User Interfaces File Management Interface Configuration System Management
· Network Protocols Configuration Guide, Part 1 · Network Protocols Command Reference, Part 1	IP Addressing IP Services IP Routing Protocols
· Network Protocols Configuration Guide, Part 2 · Network Protocols Command Reference, Part 2	AppleTalk Novell IPX
· Network Protocols Configuration Guide, Part 3 · Network Protocols Command Reference, Part 3	Apollo Domain Banyan VINES DECnet ISO CLNS XNS
· Wide-Area Networking Configuration Guide · Wide-Area Networking Command Reference	ATM Frame Relay SMDS X.25 and LAPB
· Security Configuration Guide · Security Command Reference	Terminal Access Security Network Access Security Accounting and Billing Filtering Traffic Preventing Fraudulent Route Updates Network Data Encryption
· Dial Solutions Configuration Guide · Dial Solutions Command Reference	Dial Business Solutions and Examples Dial-In Port Setup DDR and Dial Backup Remote Node and Terminal Service Cost-Control and Large-Scale Dial Solutions VPDN
· Cisco IOS Switching Services Configuration Guide · Cisco IOS Switching Services Command Reference	Switching Paths for IP Networks · Fast Switching · Autonomous Switching · NetFlow Switching · Optimum Switching Virtual LAN (VLAN) Switching and Routing · Inter-Switch Link Protocol Encapsulation · IEEE 802.10 Encapsulation · LAN Emulation
· Bridging and IBM Networking Configuration Guide · Bridging and IBM Networking Command Reference	Transparent Bridging Source-Route Bridging Remote Source-Route Bridging DLSw+ STUN and BSTUN LLC2 and SDLC IBM Network Media Translation DSPU and SNA Service Point SNA Frame Relay Access Support APPN NCIA Client/Server Topologies IBM Channel Attach
· Cisco IOS Software Command Summary · Dial Solutions Quick Configuration Guide · System Error Messages · Debug Command Reference

Online Navigation

The Cisco IOS software documentation set is available as printed manuals or electronic documents. You can access the electronic documents either on the Cisco Documentation CD-ROM or at Cisco Connection Online (CCO) on the World Wide Web:

On the Documentation CD-ROM, go to Cisco Product Documentation, select Cisco IOS Software Configuration, and then select Cisco IOS Release 11.3.
On CCO, go to Software and Support and select Documentation. Next, select Documentation, click on Cisco IOS Software Configuration, and then click on Cisco IOS Release 11.3.

New online navigation enhancements for Release 11.3 include:

Online hot-linked master indexes for configuration guide and command reference documentation sets.

: On the Documentation CD-ROM or CCO, go to Cisco IOS Release 11.3 and select Cisco IOS Release 11.3 Configuration Guides, Command References. Then select Configuration Guide Master Index or Command Reference Master Index. To access documentation related to an index entry, click on the page number following the entry.

Online hot-linked list of features that are new since Release 11.2.

On the Documentation CD-ROM or CCO, go to Cisco IOS Release 11.3 and select Cisco IOS Release 11.3 Configuration Guides, Command References. Next, select Cisco IOS 11.3 New Features.

To access configuration documentation for a feature, do one of the following:

Click on the page number following the feature name. This takes you to the page on which the feature is documented.
Using your browser's Search function, search on one or more keywords from the feature name. This displays the feature documentation on your screen.

For additional information about the Documentation CD-ROM and CCO, refer to the sections "Cisco Connection Online" and "Documentation CD-ROM" at the end of these release notes.

New Software Features in Release 11.3(1)

Release 11.3 supports features in the following categories:

IBM Support
Internet
LAN Support
Management
Multimedia
Quality of Service
Security
Switching
Terminal Services
WAN Optimization
WAN Services

Detailed descriptions of the features are available on the Documentation CD-ROM and on CCO:

On the Documentation CD-ROM, go to Cisco Product Documentation, select Cisco IOS Software Configuration, click on Cisco IOS Release 11.3, then select Release Notes for Cisco IOS Release 11.3. From the bulleted list, select New Features for Release 11.3.
From the CCO web page, go to Cisco Documentation, click on Cisco IOS Software Configuration, select Cisco IOS Release 11.3, and then select Release Notes for Cisco IOS Release 11.3. From the bulleted list, select New Features for Release 11.3.

Cisco IOS Feature Sets for Cisco 2500 Series Routers and Access Servers

The Cisco IOS software is packaged into "feature sets" (also called "software images"). There are many different feature sets available, and each feature set contains a specific subset of Cisco IOS features. Table 3 provides a matrix of the new feature set organization and shows which feature sets are available on the Cisco 2500 series routers and access servers. These feature sets only apply to Cisco IOS Release 11.3.

The tables use the following conventions to identify feature sets:

Yes: the feature set is offered for the platform
No : the feature set is not offered for the platform
Plus: a value-added option that contains a variable set of additional features depending on the hardware platform selected
Plus 40: a value-added option that contains a variable set of additional features depending on the hardware platform selected, including 40-bit data encryption
Plus 56: a value-added option that contains a variable set of additional features depending on the hardware platform selected, including 56-bit data encryption

Cisco IOS images with strong encryption (including, but not limited to, 56-bit DES) are subject to U.S. government export controls and have a limited distribution. Images to be installed outside the U.S. require an export license. Customer orders may be denied or subject to delay due to U.S. government regulations. Contact your sales representative or distributor for more information, or send e-mail to export@cisco.com.

**Table 3: Cisco IOS Release 11.3 Supported Feature Sets**
Feature Set	Cisco 2500¹ Platform
IP	Yes
IP Plus	Yes
IP Plus 40	Yes
IP Plus 56	Yes
IP 40	No
IP 56	No
IP/IPX	No
IP/IPX Plus	No
IP/IPX/AT	No
IP/IPX/AT Plus	No
IP/IPX/AT Plus 40	No
IP/IPX/AT Plus 56	No
IP/ASYNC	No
IP/IPX/ASYNC	No
IP/OSPF/PIM	No
IP/IPX/AT/IBM	No
IP/IPX/AT/IBM Plus	No
IP/IPX/AT/IBM Plus 40	No
IP/IPX/AT/IBM Plus 56	No
ISDN	Yes
Desktop	No
Desktop Plus	No
Desktop IBM	No
Desktop IBM 40	No
Desktop IBM 56	No
ATM Cable Interface Processor	No
IP/IPX/AT/DEC	Yes
IP/IPX/AT/DEC Plus	Yes
Enterprise	No
Enterprise Plus	Yes
Enterprise Plus 40	Yes
Enterprise 40	No
Enterprise Plus 56	Yes
Enterprise 56	No
Enterprise APPN	No
Enterprise APPN Plus	Yes
Enterprise APPN Plus 40	Yes
Enterprise APPN Plus 56	Yes
Enterprise APPN 40	No
Enterprise APPN 56	No
Remote Access Server	Yes
FRAD	Yes
LAN FRAD	Yes
Netflow Layer 3 Switching	No

¹ The Cisco 2500 series routers include the following models: Cisco 2501, 2502, 2503, 2504, 2505, 2507, 2516, 2520, 2521, 2522, 2523, 2513, 2514, 2515, 2524, and 2525. The Cisco 2500 series access servers include the following models: Cisco AS2509, AS2511, AS2512, AS2509-RJ, AS2511-RJ, and 2509-ET.

Feature Set Tables

To determine what features are available with each feature set, see Table 4 through Table 6. The tables summarize what features you can use when running a specific feature set on the Cisco 2500 series for Cisco IOS Release 11.3. The feature set tables use the following symbol conventions to identify features:

Yes: the feature is offered in the feature set
No: the feature is not offered in the feature set

**Table 4: Cisco IOS Software Feature Sets for the Cisco 2500 Series, Part 1**
	Feature Set
Feature	IP	IP Plus	IP Plus 40	IP Plus 56	ISDN	IP/IPX/ AT/ DEC	IP/IPX/ AT/ DEC Plus	Enter- prise Plus	Enter- prise Plus 40	Enter- prise Plus 56
IBM Support
APPN High Performance Routing	No	No	No	No	No	No	No	No	No	No
APPN MIB Enchancements	No	No	No	No	No	No	No	No	No	No
APPN over Ethernet LAN Emulation	No	No	No	No	No	No	No	No	No	No
APPN Scalability Enhancements	No	No	No	No	No	No	No	No	No	No
Bisync Enhancements, includes: Bisync 3780 Support BSC Extended Addressing Block Serial Tunneling (BSTUN) over Frame Relay	No	Yes	Yes	Yes	No	No	Yes	Yes	Yes	Yes
Cisco MultiPath Channel (CMPC)	No	No	No	No	No	No	No	No	No	No
DLSw+ Enhancements, `includes:` Backup Peer Extensions for Encapsulation Types DLSw+ Border Peer Caching DLSw+ MIB Enhancements DLSw+ SNA Type of Service LLC2-to-SDLC Conversion between PU4 Devices NetBIOS Dial-on-Demand Routing UDP Unicast Enhancement	No	Yes	Yes	Yes	No	No	Yes	Yes	Yes	Yes
FRAS Enhancements, includes: FRAS Boundary Network Node Enhancement FRAS Dial Backup over DLSw+ FRAS DLCI Backup FRAS Host FRAS MIB SRB over Frame Relay	No	Yes	Yes	Yes	No	No	Yes	Yes	Yes	Yes
SRB over FDDI on Cisco 4000-M, 4500-M, and 4700-M Routers	No	No	No	No	No	No	No	No	No	No
TN3270 LU Nailing	No	No	No	No	No	No	No	No	No	No
TN3270 Server Enhancements	No	No	No	No	No	No	No	No	No	No
Token Ring LANE	No	No	No	No	No	No	No	No	No	No
Tunneling of Asynchronous Security Protocols	No	Yes	Yes	Yes	No	No	Yes	Yes	Yes	Yes
Internet
DRP Server Agent	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IP Routing
Easy IP (Phase 1)	No	Yes	Yes	Yes	No	No	Yes	Yes	Yes	Yes
Hot Standby Router Protocol (HSRP) over ISL in Virtual LAN Configurations	No	No	No	No		No	No	No	No	No
IP Enhanced IGRP Route Authentication	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
TCP Enhancements, includes: TCP Selective Acknowledgment TCP Timestamp	No	No	No	No		No	No	Yes	Yes	Yes
LAN Support
AppleTalk Access List Enhancements	No	No	No	No	No	Yes	Yes	Yes	Yes	Yes
DECnet Accounting	No	No	No	No	No	Yes	Yes	Yes	Yes	Yes
IPX Named Access Lists	No	No	No	No	Yes	Yes	Yes	Yes	Yes	Yes
IPX SAP-after-RIP	No	No	No	No	Yes	Yes	Yes	Yes	Yes	Yes
NLSP Enhancements	No	No	No	No	No	Yes	Yes	Yes	Yes	Yes
NLSP Multicast Support	No	No	No	No	No	Yes	Yes	Yes	Yes	Yes
Management
Cisco Call History MIB Command Line Interface	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Cisco IOS Internationalization	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Entity MIB, Phase 1	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SNMPv2C	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Virtual Profiles	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Multimedia
IP Multicast Load Splitting across Equal-Cost Paths	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IP Multicast over ATM Point-to-Multipoint Virtual Circuits	No	No	No	No	No	No	No	No	No	No
IP Multicast over Token Ring LANs	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Stub IP Multicast Routing	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Quality of Service
RTP Header Compression	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes
Security
Double Authentication	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Encrypted Kerberized Telnet	No	No	No	No	No	No	No	No	No	Yes
HTTP Security	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Per-User Configuration	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Reflexive Access Lists	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes
TCP Intercept	No	No	No	No		No	No	Yes	Yes	Yes
Vendor-Proprietary RADIUS Attributes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Switching
AppleTalk Routing over ISL and IEEE 802.10 in Virtual LANs	No	No	No	No	No	No	No	No	No	No
CLNS and DECnet Fast Switching over PPP	No	No	No	No	No	No	No	Yes	Yes	Yes
DECnet/Vines/XNS over ISL, includes: Banyan VINES Routing over ISL Virtual LANs DECnet Routing over ISL Virtual LANs XNS Routing over ISL Virtual LANs	No	No	No	No	No	No	No	No	No	No
Fast-Switched Policy Routing	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IPX Routing over ISL Virtual LANs	No	No	No	No	No	No	No	No	No	No
VIP Distributed Switching Support for IP Encapsulated in ISL	No	No	No	No	No	No	No	No	No	No
Terminal Services
Virtual Interface Template Service	No	No	No	No	No	No	No	No	No	No
Virtual Templates for Protocol Translation	No	No	No	No	No	No	No	Yes	Yes	Yes
WAN Optimization
ATM MIB Enhancements	No	No	No	No	No	No	No	No	No	No
PAD Enhancements	No	No	No	No	No	No	No	Yes	Yes	Yes
PAD Subaddressing	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes
WAN Services
Bandwidth Allocation Control Protocol	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes
Enhanced Local Management Interface (ELMI)	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes
Frame Relay Enhancements	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Frame Relay MIB Extensions	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes
Frame Relay Router ForeSight	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes
ISDN Advice of Charge	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ISDN Caller ID Callback	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ISDN NFAS	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
LANE Per-subinterface Debug Messages	No	No	No	No	No	No	No	No	No	No
Layer 2 Forwarding--Fast Switching	No	Yes	Yes	Yes	No	No	Yes	Yes	Yes	Yes
Leased Line ISDN at 128 kbps	No	No	No	No	No	No	No	No	No	No
Multilink PPP Interleaving and Fair-Queuing Support	No	No	No	No	No	No	No	No	No	No
PPP over ATM	No	No	No	No	No	No	No	No	No	No
Telnet Extensions for Dialout	No	No	No	No	No	No	No	No	No	No
VPDN Tunnel Lookup Based on Dialed Number Information	No	No	No	No	No	No	No	No	No	No
X.25 Enhancements	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes
X.25 on ISDN	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes
X.25 Switching between PVCs and SVCs	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes
X.28 Emulation	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes	Yes	Yes

**Table 5: Cisco IOS Software Feature Sets for the Cisco 2500 Series, Part 2**
	Feature Set
Feature	Enterprise/ APPN Plus	Enterprise/ APPN Plus 40	Enterprise/ APPN Plus 56	Remote Access Server	FRAD	LAN FRAD	LAN FRAD/OSPF
IBM Support
APPN High Performance Routing	Yes	Yes	Yes	No	No	No	No
APPN MIB Enchancements	Yes	Yes	Yes	No	No	No	No
APPN over Ethernet LAN Emulation	Yes	Yes	Yes	No	No	No	No
APPN Scalability Enhancements	Yes	Yes	Yes	No	No	No	No
Bisync Enhancements, includes: Bisync 3780 Support BSC Extended Addressing Block Serial Tunneling (BSTUN) over Frame Relay	Yes	Yes	Yes	No	Yes	Yes	Yes
Cisco MultiPath Channel (CMPC)	No	No	No	No	No	No	No
DLSw+ Enhancements, `includes:` Backup Peer Extensions for Encapsulation Types DLSw+ Border Peer Caching DLSw+ MIB Enhancements DLSw+ SNA Type of Service LLC2-to-SDLC Conversion between PU4 Devices NetBIOS Dial-on-Demand Routing UDP Unicast Enhancement	Yes	Yes	Yes	No	No	No	No
FRAS Enhancements, includes: FRAS Boundary Network Node Enhancement FRAS Dial Backup over DLSw+ FRAS DLCI Backup FRAS Host FRAS MIB SRB over Frame Relay	Yes	Yes	Yes	No	No	No	No
SRB over FDDI on Cisco 4000-M, 4500-M, and 4700-M Routers	No	No	No	No	No	No	No
TN3270 LU Nailing	No	No	No	No	No	No	No
TN3270 Server Enhancements	No	No	No	No	No	No	No
Token Ring LANE	No	No	No	No	No	No	No
Tunneling of Asynchronous Security Protocols	Yes	Yes	Yes	No	Yes	Yes	Yes
Internet
DRP Server Agent	Yes	Yes	Yes	No	No	No	No
IP Routing
Easy IP (Phase 1)	Yes	Yes	Yes	No	No	No	No
Hot Standby Router Protocol (HSRP) over ISL in Virtual LAN Configurations	No	No	No	No	No	No	No
IP Enhanced IGRP Route Authentication	Yes	Yes	Yes	Yes	No	No	No
TCP Enhancements, includes: TCP Selective Acknowledgment TCP Timestamp	Yes	Yes	Yes	No	No	No	No
LAN Support
AppleTalk Access List Enhancements	Yes	Yes	Yes	No	No	No	No
DECnet Accounting	Yes	Yes	Yes	No	No	No	No
IPX Named Access Lists	Yes	Yes	Yes	Yes	No	Yes	Yes
IPX SAP-after-RIP	Yes	Yes	Yes	Yes	No	Yes	No
NLSP Enhancements	Yes	Yes	Yes	No	No	No	No
NLSP Multicast Support	Yes	Yes	Yes	No	No	No	No
Management
Cisco Call History MIB Command Line Interface	Yes	Yes	Yes	No	No	No	No
Cisco IOS Internationalization	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Entity MIB, Phase 1	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SNMPv2C	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Virtual Profiles	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Multimedia
IP Multicast Load Splitting across Equal-Cost Paths	Yes	Yes	Yes	Yes	No	No	No
IP Multicast over ATM Point-to-Multipoint Virtual Circuits	No	No	No	No	No	No	No
IP Multicast over Token Ring LANs	Yes	Yes	Yes	Yes	No	No	No
Stub IP Multicast Routing	Yes	Yes	Yes	Yes	No	No	No
Quality of Service
RTP Header Compression	Yes	Yes	Yes	Yes	No	No	No
Security
Double Authentication	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Encrypted Kerberized Telnet	No	No	Yes	No	No	No	No
HTTP Security	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Per-User Configuration	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Reflexive Access Lists	Yes	Yes	Yes	Yes	No	No	No
TCP Intercept	Yes	Yes	Yes	No	No	No	No
Vendor-Proprietary RADIUS Attributes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Switching
AppleTalk Routing over ISL and IEEE 802.10 in Virtual LANs	No	No	No	No	No	No	No
CLNS and DECnet Fast Switching over PPP	Yes	Yes	Yes	No	No	No	No
DECnet/Vines/XNS over ISL, includes: Banyan VINES Routing over ISL Virtual LANs DECnet Routing over ISL Virtual LANs XNS Routing over ISL Virtual LANs	No	No	No	No	No	No	No
Fast-Switched Policy Routing	Yes	Yes	Yes	Yes	No	No	No
IPX Routing over ISL Virtual LANs	No	No	No	No	No	No	No
VIP Distributed Switching Support for IP Encapsulated in ISL	No	No	No	No	No	No	No
Terminal Services
Virtual Interface Template Service	No	No	No	No	No	No	No
Virtual Templates for Protocol Translation	Yes	Yes	Yes	Yes	No	No	No
WAN Optimization
ATM MIB Enhancements	No	No	No	No	No	No	No
PAD Enhancements	Yes	Yes	Yes	Yes	No	No	No
PAD Subaddressing	Yes	Yes	Yes	Yes	No	No	No
WAN Services
Bandwidth Allocation Control Protocol	Yes	Yes	Yes	No	No	No	No
Enhanced Local Management Interface (ELMI)	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Frame Relay Enhancements	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Frame Relay MIB Extensions	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Frame Relay Router ForeSight	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ISDN Advice of Charge	Yes	Yes	Yes	No	No	No	No
ISDN Caller ID Callback	Yes	Yes	Yes	No	No	No	No
ISDN NFAS	Yes	Yes	Yes	No	No	No	No
LANE Per-subinterface Debug Messages	No	No	No	No	No	No	No
Layer 2 Forwarding--Fast Switching	Yes	Yes	Yes	Yes	No	No	No
Leased Line ISDN at 128 kbps	No	No	No	No	No	No	No
Multilink PPP Interleaving and Fair-Queuing Support	No	No	No	No	No	No	No
PPP over ATM	No	No	No	No	No	No	No
Telnet Extensions for Dialout	No	No	No	No	No	No	No
VPDN Tunnel Lookup Based on Dialed Number Information	No	No	No	No	No	No	No
X.25 Enhancements	Yes	Yes	Yes	Yes	No	No	No
X.25 on ISDN	Yes	Yes	Yes	No	No	No	No
X.25 Switching between PVCs and SVCs	Yes	Yes	Yes	Yes	No	No	No
X.28 Emulation	Yes	Yes	Yes	Yes	No	No	No

**Table 6: Cisco IOS Software Feature Sets for the Cisco 2500 Fixed FRAD Series**
	Feature Set
Feature	FRAD	LANFRAD	LANFRAD/OSPF
IBM Support
APPN High Performance Routing	No	No	No
APPN MIB Enchancements	No	No	No
APPN over Ethernet LAN Emulation	No	No	No
APPN Scalability Enhancements	No	No	No
Bisync Enhancements, includes: Bisync 3780 Support BSC Extended Addressing Block Serial Tunneling (BSTUN) over Frame Relay	Yes	Yes	Yes
Cisco MultiPath Channel (CMPC)	No	No	No
DLSw+ Enhancements, `includes:` Backup Peer Extensions for Encapsulation Types DLSw+ Border Peer Caching DLSw+ MIB Enhancements DLSw+ SNA Type of Service LLC2-to-SDLC Conversion between PU4 Devices NetBIOS Dial-on-Demand Routing UDP Unicast Enhancement	No	No	No
FRAS Enhancements, includes: FRAS Boundary Network Node Enhancement FRAS Dial Backup over DLSw+ FRAS DLCI Backup FRAS Host FRAS MIB SRB over Frame Relay	No	No	No
SRB over FDDI on Cisco 4000-M, 4500-M, and 4700-M Routers	No	No	No
TN3270 LU Nailing	No	No	No
TN3270 Server Enhancements	No	No	No
Token Ring LANE	No	No	No
Tunneling of Asynchronous Security Protocols	Yes	Yes	Yes
Internet
DRP Server Agent	No	No	No
IP Routing
Easy IP (Phase 1)	No	No	No
Hot Standby Router Protocol (HSRP) over ISL in Virtual LAN Configurations	No	No	No
IP Enhanced IGRP Route Authentication	Yes	Yes	No
TCP Enhancements, includes: TCP Selective Acknowledgment TCP Timestamp	No	No	No
LAN Support
AppleTalk Access List Enhancements	No	No	No
DECnet Accounting	No	No	No
IPX Named Access Lists	No	Yes	Yes
IPX SAP-after-RIP	No	Yes	No
NLSP Enhancements	No	No	No
NLSP Multicast Support	No	No	No
Management
Cisco Call History MIB Command Line Interface	No	No	No
Cisco IOS Internationalization	No	No	No
Entity MIB, Phase 1	Yes	Yes	Yes
SNMPv2C	Yes	Yes	Yes
Virtual Profiles	Yes	Yes	Yes
Multimedia
IP Multicast Load Splitting across Equal-Cost Paths	No	No	No
IP Multicast over ATM Point-to-Multipoint Virtual Circuits	No	No	No
IP Multicast over Token Ring LANs	No	No	No
Stub IP Multicast Routing	No	No	No
Quality of Service
RTP Header Compression	No	No	No
Security
Double Authentication	Yes	Yes	Yes
Encrypted Kerberized Telnet	No	No	No
HTTP Security	No	No	No
Per-User Configuration	Yes	Yes	Yes
Reflexive Access Lists	No	No	No
TCP Intercept	No	No	No
Vendor-Proprietary RADIUS Attributes	Yes	Yes	Yes
Switching
AppleTalk Routing over ISL and IEEE 802.10 in Virtual LANs	No	No	No
CLNS and DECnet Fast Switching over PPP	No	No	No
DECnet/Vines/XNS over ISL, includes: Banyan VINES Routing over ISL Virtual LANs DECnet Routing over ISL Virtual LANs XNS Routing over ISL Virtual LANs	No	No	No
Fast-Switched Policy Routing	No	No	No
IPX Routing over ISL Virtual LANs	No	No	No
VIP Distributed Switching Support for IP Encapsulated in ISL	No	No	No
Terminal Services
Virtual Interface Template Service	No	No	No
Virtual Templates for Protocol Translation	No	No	No
WAN Optimization
ATM MIB Enhancements	No	No	No
PAD Enhancements	No	No	No
PAD Subaddressing	No	No	No
WAN Services
Bandwidth Allocation Control Protocol	No	No	No
Enhanced Local Management Interface (ELMI)	Yes	Yes	Yes
Frame Relay Enhancements	Yes	Yes	Yes
Frame Relay MIB Extensions	Yes	Yes	Yes
Frame Relay Router ForeSight	Yes	Yes	Yes
ISDN Advice of Charge	No	No	No
ISDN Caller ID Callback	No	No	No
ISDN NFAS	No	No	No
LANE Per-subinterface Debug Messages	No	No	No
Layer 2 Forwarding--Fast Switching	No	No	No
Leased Line ISDN at 128 kbps	No	No	No
Multilink PPP Interleaving and Fair-Queuing Support	No	No	No
PPP over ATM	No	No	No
Telnet Extensions for Dialout	No	No	No
VPDN Tunnel Lookup Based on Dialed Number Information	No	No	No
X.25 Enhancements	No	No	No
X.25 on ISDN	No	No	No
X.25 Switching between PVCs and SVCs	No	No	No
X.28 Emulation	No	No	No

Upgrading to a New Software Release

If you are upgrading to Cisco IOS Release 11.3 from an earlier Cisco IOS software release, you should save your current configuration file before configuring your access server with the Cisco IOS Release 11.3 software. An unrecoverable error could occur during download or configuration.

Note Before downloading a software upgrade, read Product Bulletin #703, Cisco IOS Software Release Upgrade Paths and Packaging Simplification. The information in this bulletin supersedes the following instructions.

For instructions on downloading a current Cisco IOS release from the CCO Trivial File Transfer Protocol (TFTP) server, go to the following URL. (This URL is subject to change without notice.)

http://www.cisco.com/kobayashi/sw-center

The Software Center window is displayed.

Step 1 Click Cisco IOS Software. The Cisco IOS Software window is displayed.

Step 2 Click Cisco IOS 11.3. The Cisco 11.3 Software Upgrade Planner window is displayed.

Step 3 Click Download Cisco IOS 11.3 Software. The Software Checklist window is displayed.

Step 4 Select the appropriate information in each section of the Software Checklist window.

Hardware
Release
Software and hardware release

Step 5 Click Execute. The software release is downloaded to your desktop computer.

Step 6 Transfer the software release to a local TFTP server on your network, using a terminal emulation application, such as TCP Connect.

Step 7 Log in to your router. Copy the software release from your TFTP server to your router, using the copy tftp command.

Memory Requirements

Table 7 through Table 9 describe the memory requirements for the Cisco 2500 series platform feature set supported by Cisco IOS Release 11.3. Beginning with Cisco IOS Release 10.3, some software image sizes exceed 4 MB and, when compressed, exceed 2 MB. Also, some systems now require more than 1 MB of main system memory for data structure tables.

For Cisco routers to take advantage of the Release 11.3 features, you must upgrade the code or main system memory. Some platforms have specific chip or architecture requirements that affect what can be upgraded and in what increments.

**Table 7: Release 11.3 Memory Requirements**
Platform/Feature Set	Minimum Required Code Memory	Required Main Memory	Release 11.3 Runs from
IP	8 MB Flash	4 MB DRAM	Flash
IP Plus	8 MB Flash	4 MB DRAM	Flash
IP Plus 40	8 MB Flash	4 MB DRAM	Flash
IP 56 Plus	8 MB Flash	4 MB DRAM	Flash
ISDN	8 MB Flash	4 MB DRAM	Flash
IP/IPX/AT/DEC	8 MB Flash	4 MB DRAM	Flash
IP/IPX/AT/DEC Plus	8 MB Flash	6 MB DRAM	Flash
Enterprise Plus	16 MB Flash	6 MB DRAM	Flash
Enterprise Plus 40	16 MB Flash	6 MB DRAM	Flash
Enterprise Plus 56	16 MB Flash	6 MB DRAM	Flash
Enterprise/APPN Plus	16 MB Flash	8 MB DRAM	Flash
Enterprise/APPN Plus 40	16 MB Flash	8 MB DRAM	Flash
Enterprise/APPN Plus 56	16 MB Flash	8 MB DRAM	Flash
Remote Access Server (RAS)	8 MB Flash	4 MB DRAM	Flash
FRAD	8 MB Flash	4 MB DRAM	Flash
LANFRAD	8 MB Flash	4 MB DRAM	Flash
Cisco 2500 Fixed FRAD Series
FRAD	8 MB Flash	4 MB DRAM	Flash
LANFRAD	8 MB Flash	4 MB DRAM	Flash

**Table 8: Cisco AS2509-RJ and Cisco AS2511-RJ--Memory Requirements**
Feature Set	Required Flash Memory	Required DRAM Memory	Release 11.3 Runs from¹
IP	8 MB Flash	4 MB DRAM	Flash
Remote Access Server	8 MB Flash	4 MB DRAM	Flash

¹ When a system is running from Flash memory, you cannot update the system while it is running. You must use the Flash load helper.

**Table 9: Cisco 2500 Fixed FRAD Series--Memory Requirements**
Feature Set	Required Flash Memory	Required DRAM Memory	Release 11.3 Runs from¹
CFRAD	4 MB Flash	4 MB DRAM	Flash
LAN FRAD	4 MB Flash	4 MB DRAM	Flash
OSPF LAN FRAD	4 MB Flash	4 MB DRAM	Flash

¹ When a system is running from Flash memory, you cannot update the system while it is running. You must use the Flash load helper.

Caveats for Release 11.3(1)

Possibly unexpected behavior in Cisco IOS Release 11.3 exists in the following areas:

Access Server
AppleTalk
Basic System Services
IBM Connectivity
Interfaces and Bridging
IP Routing Protocols
LAT
Novell IPX, XNS, and Apollo Domain
Protocol Translation
TCP/IP Host-Mode Services
TN3270
Wide-Area Networking

A complete list of the caveats, including descriptions and possible workarounds, is available on the Documentation CD-ROM and on CCO:

On the Documentation CD-ROM, go to Cisco Product Documentation, select Cisco IOS Software Configuration, click on Cisco IOS Release 11.3, then select Release Notes for Cisco IOS Release 11.3. From the bulleted list, select Important Notes and Caveats for Release 11.3.
On CCO, go to Software and Support and select Documentation. Next, go to Cisco Documentation, click on Cisco IOS Software Configuration, select Cisco IOS Release 11.3, and then select Release Notes for Cisco IOS Release 11.3. From the bulleted list, click on Important Notes and Caveats for Release 11.3.

Cisco Connection Online

Cisco Connection Online (CCO) is Cisco Systems' primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional information and services.

Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Cisco's customers and business partners. CCO services include product information, product documentation, software updates, release notes, technical tips, the Bug Navigator, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.

CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously: a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and it is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.

You can access CCO in the following ways:
WWW: http://www.cisco.com
WWW: http://www-europe.cisco.com
WWW: http://www-china.cisco.com
Telnet: cco.cisco.com
Modem: From North America, 408 526-8070; from Europe, 33 1 64 46 40 82. Use the following terminal settings: VT100 emulation; databits: 8; parity: none; stop bits: 1; and connection rates up to 28.8 kbps.

For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.

If you are a network administrator and need personal technical assistance with a Cisco product that is under warranty or covered by a maintenance contract, contact Cisco's Technical Assistance Center (TAC) at 800 553-2447, 408 526-7209, or tac@cisco.com. To obtain general information about Cisco Systems, Cisco products, or upgrades, contact 800 553-6387, 408 526-7208, or cs-rep@cisco.com.

Documentation CD-ROM

Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM, a member of the Cisco Connection Family, is updated monthly. Therefore, it might be more up to date than printed documentation. To order additional copies of the Documentation CD-ROM, contact your local sales representative or call customer service. The CD-ROM package is available as a single package or as an annual subscription. You can also access Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.

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