Table Of Contents
Release Notes for the Cisco 2600 Series Routers for Cisco IOS Release 11.3 XA1
Contents
Determining Your Cisco IOS Software Release
Related Documentation
Cisco 2600 Documentation
New Feature Documentation
Cisco IOS Software Documentation
Documentation Modules
Master Indexes
Documentation Set
Online Navigation for Cisco IOS Software Documentation
Online Navigation Enhancements
Interfaces Supported
Cisco IOS Feature Sets for the Cisco 2600 Series
Memory Requirements
New Features in Cisco IOS Release 11.3(2)XA1
Voice-over IP
Dialer Watch
MS Callback
PIM Version 2
SNMP Inform Requests
New and Changed Show Commands
Caveats for Cisco IOS Release 11.3(2)XA1
Basic System Services
Upgrading to a New Software Release
Cisco Connection Online
Documentation CD-ROM
Release Notes for the Cisco 2600 Series Routers for Cisco IOS Release 11.3 XA1
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" on page 2 and "Online Navigation for Cisco IOS Software Documentation" on page 6.
Contents
The following topics are discussed:
•
Determining Your Cisco IOS Software Release
•Related Documentation
•Online Navigation for Cisco IOS Software Documentation
•Interfaces Supported
•Cisco IOS Feature Sets for the Cisco 2600 Series
•Memory Requirements
•New Features in Cisco IOS Release 11.3(2)XA1
•Caveats for Cisco IOS Release 11.3(2)XA1
•Upgrading to a New Software Release
•Cisco Connection Online
•Documentation CD-ROM
Determining Your Cisco IOS Software Release
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:
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.
Related Documentation
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.
Cisco 2600 Documentation
The following documents are available:
•Cisco 2600 Series Hardware Installation Guide
•Cisco 2600 Series Software Installation and Configuration Guide
•Cisco Network Modules Hardware Installation and Configuration Guide
•Cisco WAN Interface Cards Hardware Installation and Configuration Guide
•New and Changed Show Commands for the Cisco 2600 Series Routers (To access this online document, see the section "New Feature Documentation.")
•Regulatory compliance and safety information
•Documentation for spare parts
These documents can be found on the Documentation CD-ROM and on CCO:
•On the Documentation CD, the path is Access Servers and Access Routers: Modular Access Routers: Cisco 2600 Series Routers. For more information, refer to "Documentation CD-ROM" on page 16.
•On Cisco Connection Online (CCO), http://www.cisco.com/, the path is Software & Support: Cisco Documentation: Access Servers and Access Routers: Modular Access Routers: Cisco 2600 Series Routers. For more information, refer to "Cisco Connection Online" on page 15.
New Feature Documentation
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" on page 12.
The online feature documentation can be found on CCO and the Documentation CD-ROM:
•On Cisco Connection Online (CCO), http://www.cisco.com/, the path is Products and Ordering: Documentation: Cisco Documentation: Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 11.3: Cisco IOS 11.3T New Features and Cisco IOS 11.3XA New Features. For more information, refer to "Cisco Connection Online" on page 15.
•On the Documentation CD, the path is Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 11.3: Cisco IOS 11.3T New Features and Cisco IOS 11.3XA New Features. For more information, refer to "Documentation CD-ROM" on page 16.
Cisco IOS Software Documentation
The Cisco IOS software documentation is divided into nine modules and two master indexes. There are also four supporting documents.
Note The most current Cisco IOS documentation can be found on the latest Documentation CD-ROM and on the Web. These electronic documents contain updates and modifications made after the paper documents were printed. See the section "Online Navigation for Cisco IOS Software Documentation" on page 6 for more details.
Documentation Modules
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.
Note Due to a production problem, many source-route bridging commands were omitted from the printed version of the Cisco IOS Software Command Summary (part number 78-4746-01). For complete documentation of all source-route bridging commands, refer to the Bridging and IBM Networking Command Reference (part number 78-4743-01). You can also obtain the most current documentation on Cisco Connection Online (CCO) and the Documentation CD-ROM.
Master Indexes
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.
Documentation Set
The Cisco IOS documentation set consists of the following books and chapter topics:
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
|
AAA Security Services
Security Server Protocols
Traffic Filtering
Network Data Encryption
Passwords and Privileges
Neighbor Router Authentication
IP Security Options
|
•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
|
|
Note The Cisco Management Information Base (MIB) User Quick Reference publication is no longer being published. For the latest list of MIBs supported by Cisco, see the Cisco Network Management Toolkit on Cisco Connection Online. On CCO, go to Software and Support; click Software Center: Network Management Products: Cisco Network Management Toolkit: Cisco MIBs.
Online Navigation for Cisco IOS Software Documentation
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.
•On the Documentation CD-ROM, click Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 11.3.
•On CCO, click Software & Support, scroll down and click Documentation: Cisco IOS Software Configuration: Cisco IOS Release 11.3.
The following are some of the types of Cisco IOS Release 11.3 documents available:
•Configuration guides and command references
•Feature descriptions
•Product-specific release notes
•Cisco IOS software caveats
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.
Online Navigation Enhancements
New online navigation enhancements for Release 11.3 include the following:
•Online hot-linked master indexes for configuration guide and command reference documentation sets.
On CCO or the Documentation CD-ROM, go to Cisco IOS Release 11.3 and click Cisco IOS Release 11.3 Configuration Guides, Command References. Then click 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 CCO or the Documentation CD-ROM, go to Cisco IOS Release 11.3 and click Cisco IOS Release 11.3 Configuration Guides, Command References. Next, click 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 location where the feature is documented.
•Using your browser search function, search on one or more keywords from the feature name. This brings the feature documentation to your screen.
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.
Interfaces Supported
The following LAN and WAN interfaces are supported on the Cisco 2600 series routers:
•1- or 2-port Ethernet (10BaseT)
•1- and 2-port voice
•Serial (1T, 2T, 2A/S, 4-, 8-port asynchronous/synchronous serial, 16-, 32-port asynchronous serial)
•1-port ISDN BRI (both U with internal NT1 and S/T)
•1-port 56/64-kbps DSU/CSU
Cisco IOS Feature Sets for the Cisco 2600 Series
This section lists Cisco IOS software feature sets available for the Cisco 2600 series routers. uses these terms to identify features:
Feature Set
Matrix Term
|
Description
|
Yes
|
This feature is offered.
|
No
|
This feature is not offered.
|
Table 1 Cisco IOS Software Feature Sets for the Cisco 2600 Series
| |
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
|
|
|
|
|
|
|
|
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:
–Bisync 3780 Support
–BSC Extended Addressing
–Block Serial Tunneling (BSTUN) over Frame Relay
|
No
|
Yes
|
No
|
Yes
|
Yes
|
Yes
|
No
|
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
|
No
|
Yes
|
No
|
Yes
|
Yes
|
Yes
|
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
|
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
|
|
|
|
|
|
|
|
DRP Server Agent
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
No
|
DRP Server Agent Enhancements
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
No
|
IP Routing
|
|
|
|
|
|
|
|
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:
–TCP Selective Acknowledgment
–TCP Timestamp
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
LAN Support
|
|
|
|
|
|
|
|
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
|
|
|
|
|
|
|
|
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
|
|
|
|
|
|
|
|
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
|
|
|
|
|
|
|
|
RTP Header Compression
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Yes
|
Security
|
|
|
|
|
|
|
|
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
|
|
|
|
|
|
|
|
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:
–Banyan VINES Routing over ISL Virtual LANs
–DECnet Routing over ISL Virtual LANs
–XNS Routing over ISL Virtual LANs
|
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
|
|
|
|
|
|
|
|
Virtual Templates for Protocol Translation
|
No
|
No
|
No
|
No
|
Yes
|
Yes
|
Yes
|
WAN Optimization
|
|
|
|
|
|
|
|
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
|
|
|
|
|
|
|
|
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
|
Memory Requirements
describes the memory requirements for the Cisco 2600 series feature sets supported by Release 11.3 XA1.
Table 2 Cisco 2600 Memory Requirements
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
|
New Features in Cisco IOS Release 11.3(2)XA1
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" on page 3.
Voice-over IP
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:
•Toll bypass
•Remote PBX presence over WANs
•Unified voice/data trunking
•POTS-Internet telephony gateways
Dialer Watch
Dialer Watch is a backup feature that integrates dial backup with routing capabilities. Prior dial backup implementations used the following conditions to trigger backup:
•Interesting packets were defined at central and remote routers using Dial on Demand routing (DDR).
•Connection loss occurred on a primary interface using a back up interface with floating static routes.
•Traffic thresholds were exceeded using a dialer load threshold.
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.
MS Callback
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.
PIM Version 2
Protocol-Independent Multicast (PIM) Version 2 includes the following improvements over PIM Version 1:
•A single, active rendezvous point (RP) exists per multicast group, with multiple backup RPs. This compares to multiple active RPs for the same group in PIM Version 1.
•A bootstrap router (BSR) provides a fault-tolerant, automated RP discovery and distribution mechanism. Thus, routers dynamically learn the group-to-RP mappings.
•Sparse mode and dense mode are properties of a group, as opposed to an interface. We strongly recommend sparse-dense mode, as opposed to either sparse mode or dense mode only.
•PIM Join and Prune messages have more flexible encodings for multiple address families.
•A more flexible Hello packet format replaces the Query packet to encode current and future capability options.
•Register messages to an RP indicate whether they were sent by a border router or a designated router.
•PIM packets are no longer inside IGMP packets; they are stand-alone packets.
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).
SNMP Inform Requests
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.
New and Changed Show Commands
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.
Caveats for Cisco IOS Release 11.3(2)XA1
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:
•On CCO, go to Software and Support; click Documentation: Cisco IOS Software Configuration: Cisco IOS Release 11.3. From the bulleted list, click on Release Notes for Cisco IOS Release 11.3 and Cisco IOS Software Release 11.3 and 11.3T Caveats.
•On the Documentation CD-ROM, go to Cisco Product Documentation; click Cisco IOS Software Configuration: Cisco IOS Release 11.2. From the bulleted list, click on Release Notes for Cisco IOS Release 11.3 and Cisco IOS Software Release 11.3 and 11.3T Caveats.
Basic System Services
•The switched 56 show interface stat counters are incorrect. On Cisco 2600 series routers equipped with a 56k DSU with a heavy traffic load, you might see incorrect data in the output of the show interface accounting command. The problem will occur in PktsIn PktsOut CharsIn and CharsOut fields and will appear as extremely large numbers such as 4294967295. [CSCdj74285]
•Continuous output errors occur on sync MLPPP interface. This problem occurs with 4/8 A/S Network module operates in sync. mode with MLPP configured. The output errors seem to be caused by the system latency when interfaces are configured with MLPP. The latency causes underrun to occur during transmission partial packet. The problem is not severe but occasionally degrades performance. The error rate expected is about less than 4%. Currently, there is no work around. [CSCdj76721]
•On Cisco 2600 routers running Release 11.3 (2) with a 2T WIC card inserted, the CardDescr entry for the 2T WIC might not be visible to SNMP management programs. [CSCdj87922]
•Using the BRI WIC card, SegV unconfigures the dialer interface. The problem only occurs when attempting to unconfigure the dialer rotary-group command and remove the dialer interface. This problem should not be a normal operation for the typical user. [CSCdj92215]
Upgrading to a New Software Release
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
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.
Note 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 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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