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April 6, 1998
These release notes discuss new features and caveats for the Cisco 2600 series routers, which are supported in Cisco IOS Release 11.3(2)XA1.
For more information about the software features and caveats in Release 11.3, refer to the publication Release Notes for Cisco IOS Release 11.3. For information on how to locate this document, refer to the sections "Related Documentation" and "Online Navigation for Cisco IOS Software Documentation".
The following topics are discussed:
To determine the version of Cisco IOS software running on your access server, log in to the access server and enter the show version User EXEC command:
router> show version
The output begins with the following. The Cisco IOS version appears in the second line.
Cisco Internetwork Operating System Software IOS (tm) C2600 Software (C2600-JS-MZ), Version 11.3(2)XA.......
The output includes more information including processor revision numbers, memory amounts, hardware IDs, and partition information.
These release notes should be used in conjunction with the documents listed in this section, and in particular with Release Notes for Cisco IOS Release 11.3, which contains some feature and caveat information applicable to Release 11.3 XA1.
The following documents are available:
These documents can be found on the Documentation CD-ROM and on CCO:
Cisco 2600 series routers support new software functionality, which is described in online documentation. This documentation includes configuration tasks and new and changed command reference pages that supplement the Cisco IOS Release 11.3 configuration guides and command references.
For a list of the new software features supported by Cisco 2600 series routers, see the section "New Features in Cisco IOS Release 11.3(2)XA1".
The online feature documentation can be found on CCO and the Documentation CD-ROM:
The Cisco IOS software documentation is divided into nine modules and two master indexes. There are also four supporting documents.
Each module consists of two books: a configuration guide and a corresponding command reference. Chapters in a configuration guide describe protocols, configuration tasks, Cisco IOS software functionality, and comprehensive configuration examples. Chapters in a command reference provide complete command syntax information. Each configuration guide can be used in conjunction with its corresponding command reference.
Two master indexes provide indexing information for the Cisco IOS software documentation set: an index for the configuration guides and an index for the command references. In addition, individual books contain a book-specific index.
The Cisco IOS documentation set consists of the following books and chapter topics:
| Books | Chapter Topics |
|---|---|
| Configuration Fundamentals Overview Cisco IOS User Interfaces File Management Interface Configuration System Management |
| IP Addressing IP Services IP Routing Protocols |
| AppleTalk Novell IPX |
| Apollo Domain Banyan VINES DECnet ISO CLNS XNS |
| ATM Frame Relay SMDS X.25 and LAPB |
| AAA Security Services Security Server Protocols Traffic Filtering Network Data Encryption Passwords and Privileges Neighbor Router Authentication IP Security Options |
| 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 |
| 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 |
| 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 |
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You can access the Cisco IOS software electronic documents either at Cisco Connection Online (CCO) on the World Wide Web or on the Cisco Documentation CD-ROM.
The following are some of the types of Cisco IOS Release 11.3 documents available:
For Product Bulletins on CCO, the path is as follows from Cisco Connection Online: Products and Ordering: More Information: Product Bulletins. In the Software area, under Cisco IOS 11.3, click Cisco IOS Software Release 11.3 Upgrade Paths.
New online navigation enhancements for Release 11.3 include the following:
For additional information about CCO or the Documentation CD-ROM, refer to the sections "Cisco Connection Online" and "Documentation CD-ROM" at the end of these release notes.
The following LAN and WAN interfaces are supported on the Cisco 2600 series routers:
This section lists Cisco IOS software feature sets available for the Cisco 2600 series routers. Table 1 uses these terms to identify features:
| Feature Set Matrix Term | Description |
|---|---|
Yes | This feature is offered. |
No | This feature is not offered. |
| Feature Set | |||||||
|---|---|---|---|---|---|---|---|
| Feature | IP | IP Plus | IP/IPX/ AT/DEC | IP/IPX/ AT/DEC Plus | Enterprise Plus | Enterprise/ APPN Plus | Remote Access Server |
| IBM Support |
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APPN High Performance Routing | No | No | No | No | No | Yes | No |
APPN MIB Enhancements | No | No | No | No | No | Yes | No |
APPN over Ethernet LAN Emulation | No | No | No | No | No | Yes | No |
APPN Scalability Enhancements | No | No | No | No | No | Yes | No |
Bisync Enhancements, includes:
| No | Yes | No | Yes | Yes | Yes | No |
Cisco MultiPath Channel (CMPC) | No | No | No | No | No | No | No |
DLSw+ Enhancements, includes:
| No | Yes | No | Yes | Yes | Yes | No |
FRAS Enhancements, includes:
| No | Yes | No | Yes | Yes | Yes | 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 | No | Yes | No | Yes | Yes | Yes | No |
| Internet |
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DRP Server Agent | Yes | Yes | Yes | Yes | Yes | Yes | No |
DRP Server Agent Enhancements | Yes | Yes | Yes | Yes | Yes | Yes | No |
| IP Routing |
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Easy IP (Phase 1) | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Hot Standby Router Protocol (HSRP) over ISL in Virtual LAN Configurations | No | Yes | Yes | Yes | Yes | Yes | No |
IP Enhanced IGRP Route Authentication | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
TCP Enhancements, includes:
| Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| LAN Support |
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AppleTalk Access List Enhancements | No | No | Yes | Yes | Yes | Yes | No |
DECnet Accounting | No | No | Yes | Yes | Yes | Yes | No |
IPX Named Access Lists | No | No | Yes | Yes | Yes | Yes | Yes |
IPX SAP-after-RIP | No | No | Yes | Yes | Yes | Yes | Yes |
NLSP Enhancements | No | No | No | No | Yes | Yes | No |
NLSP Multicast Support | No | No | Yes | Yes | Yes | Yes | No |
| Management |
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Cisco Call History MIB Command Line Interface | No | No | No | 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 |
SNMP Inform Requests | No | No | No | No | Yes | Yes | Yes |
Virtual Profiles | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Multimedia |
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IP Multicast Load Splitting across Equal-Cost Paths | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
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 | Yes | Yes | Yes |
PIM Version 2 | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Stub IP Multicast Routing | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Voice over IP | No | Yes | No | Yes | Yes | Yes | Yes |
| Quality of Service |
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RTP Header Compression | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Security |
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Double Authentication | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Encrypted Kerberized Telnet | No | No | No | 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 | Yes | Yes | Yes |
TCP Intercept | No | No | No | No | Yes | Yes | No |
Vendor-Proprietary RADIUS Attributes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Switching |
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AppleTalk Routing over ISL and IEEE 802.10 in Virtual LANs | No | No | Yes | Yes | Yes | Yes | No |
CLNS and DECnet Fast Switching over PPP | No | No | No | No | Yes | Yes | No |
DECnet/VINES/XNS over ISL, includes:
| No | No | No | No | Yes | No | No |
Fast-Switched Policy Routing | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
IPX Routing over ISL Virtual LANs | No | No | Yes | Yes | Yes | Yes | No |
VIP Distributed Switching Support for IP Encapsulated in ISL | No | No | No | No | No | No | No |
| Terminal Services |
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Virtual Templates for Protocol Translation | No | No | No | No | Yes | Yes | Yes |
| WAN Optimization |
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ATM MIB Enhancements | No | No | No | No | No | No | No |
PAD Enhancements | No | No | No | No | Yes | Yes | Yes |
PAD Subaddressing | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| WAN Services |
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Bandwidth Allocation Control Protocol | Yes | Yes | Yes | Yes | Yes | Yes | No |
Dialer Watch | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
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 | No | No | No | No | No | No | No |
ISDN Caller ID Callback | Yes | Yes | Yes | Yes | Yes | Yes | No |
ISDN NFAS | No | No | No | No | No | No | No |
Layer 2 Forwarding---Fast Switching | No | Yes | No | Yes | Yes | Yes | Yes |
Leased Line ISDN at 128 kbps | Yes | Yes | Yes | Yes | Yes | Yes | No |
MS Callback | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
PPP over ATM | No | No | No | No | No | No | No |
Telnet Extensions for Dialout | No | No | No | No | No | No | Yes |
X.25 Enhancements | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
X.25 on ISDN | No | No | No | No | No | No | No |
X.25 Switching between PVCs and SVCs | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
X.28 Emulation | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Table 2 describes the memory requirements for the Cisco 2600 series feature sets supported by Release 11.3 XA1.
| Feature Set | Image Name | Required Flash Memory | Required DRAM Memory | Runs From |
|---|---|---|---|---|
IP | c2600-i-mz | 4 MB | 16 MB | RAM |
IP Plus | c2600-is-mz | 8 MB | 20 MB | RAM |
IP/IPX/AT/DEC | c2600-d-mz | 8 MB | 16 MB | RAM |
IP/IPX/AT/DEC Plus | c2600-ds-mz | 8 MB | 20 MB | RAM |
Enterprise Plus | c2600-js-mz | 8 MB | 24 MB | RAM |
Enterprise/APPN Plus | c2600-ajs-mz | 8 MB | 32 MB | RAM |
Remote Access Server | c2600-c-mz | 4 MB | 16 MB | RAM |
Release 11.3(2)XA1 is the first release for the Cisco 2600 series routers. This software release includes many new software features, which are briefly described in this section. Each feature is more extensively described in online feature modules. To access these documents, see the section "New Feature Documentation".
Voice-over IP enables a Cisco 2600 series router to carry live voice traffic (for example, telephone calls and faxes) over an IP network.
This feature provides the following benefits:
Dialer Watch is a backup feature that integrates dial backup with routing capabilities. Prior dial backup implementations used the following conditions to trigger backup:
Prior backup implementations might not have supplied optimum performance on some networks, such as those using Frame Relay multipoint subinterfaces or Frame Relay connections that do not support end-to-end LMI. Dialer Watch provides reliable connectivity without relying solely on defining interesting traffic to trigger outgoing calls at the central router.
Dialer Watch uses the convergence times and characteristics of dynamic routing protocols. Integrating backup and routing features enables Dialer Watch to monitor every deleted route. By configuring a set of watched routes that define the primary interface, you are able to monitor and track the status of the primary interface as watched routes are added and deleted.
The MS Callback feature provides client-server callback services for Microsoft Windows 95 and Microsoft Windows NT clients. MS Callback supports the Microsoft Callback Control Protocol (MSCB). MSCB is Microsoft's proprietary protocol that is used by Windows 95 and Windows NT clients. MS Callback supports negotiated PPP Link Control Protocol (LCP) extensions initiated and agreed upon by the Microsoft client. MS Callback is added to existing PPP Callback functionality. Therefore, if you configure your Cisco access server to perform PPP Callback using Cisco IOS Release 11.3(2)T or later, MS Callback is automatically available.
MS Callback supports AAA security models using a local database or AAA server. MSCB uses LCP callback options with suboption type 6. The Cisco MS Callback feature supports clients with a user-specified callback number and server specified (preconfigured) callback number. MS Callback does not affect non-Microsoft machines that implement standard PPP LCP extensions as described in RFC 1570. In this scenario, MS Callback is transparent.
Protocol-Independent Multicast (PIM) Version 2 includes the following improvements over PIM Version 1:
PIM Version 1, together with the Auto-RP feature, can perform the same tasks as the PIM Version 2 BSR. However, Auto-RP is a standalone protocol, separate from PIM Version 1, and Cisco proprietary. PIM Version 2 is a standards track protocol in the Internet Engineering Task Force (IETF).
The SNMP Inform Requests feature allows routers to send inform requests to SNMP managers. Routers can send notifications to SNMP managers when particular events occur. For example, an agent router might send a message to a manager when the agent router experiences an error condition.
SNMP notifications can be sent as traps or inform requests. Traps are unreliable because the receiver does not send any acknowledgment when it receives a trap. The sender cannot determine if the trap was received. However, an SNMP manager that receives an inform request acknowledges the message with an SNMP response PDU. If the manager does not receive an inform request, it does not send a response. If the sender never receives a response, the inform request can be sent again. Thus, informs are more likely to reach their intended destination.
The Cisco 2600 series routers have a few new and changed show commands, such as the show c2600 command and show pci configuration-space command. For a complete description of these commands, see the online publication New and Changed Show Commands for the Cisco 2600 Series Routers.
This section describes possibly unexpected behavior by Release 11.3(2)XA1.
For a full list of possible caveats that could apply to this release, such as possibly unexpected behavior in Cisco IOS Release 11.3(2) or 11.3(2)T, refer to the online publications Release Notes for Cisco IOS Release 11.3 and Cisco IOS Software Release 11.3 and 11.3T Caveats.
You can access these documents on CCO or the CD-ROM:
For information on upgrading to a new software release, refer to the Cisco IOS Software Release Upgrade Paths product Bulletin #703 (12/97). To access this product bulletin on the Web through Cisco Connection Online, at http://www.cisco.com, follow the path: Products & Ordering: More Information: Product Bulletins. In the Software area, under Cisco IOS 11.3, click Cisco IOS Software Release 11.3 Upgrade Paths (#703: 12/97).
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:
For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.
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 current 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.
If you are reading Cisco product documentation on the World Wide Web, you can submit comments electronically. Click Feedback in the toolbar, select Documentation, and click Enter the feedback form. After you complete the form, click Submit to send it to Cisco. We appreciate your comments.
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