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Table of Contents

Release Notes for Cisco IOS Release 11.2 BC

Release Notes for Cisco IOS Release 11.2 BC

These release notes describe the features for IBM network software in Cisco IOS Release 11.2 BC, up to and including the final Release 11.2(23)BC1. The Cisco IOS Release 11.2 BC offers features from Cisco IOS Release 11.2 plus Channel Interface Processor (CIP)-related features. This release contains the stability that is required for deploying this software in a production environment. Use Release 11.2 BC for Cisco 7000 series routers installed with Route Switch Processor (RSP) and Cisco 7500 series routers.

Note The software caveats that apply to Release 11.2 also apply to Release 11.2 BC. For information on software caveats, microcode revision history, and RSP revision history, refer to the Release Notes for Cisco IOS Release 11.2 (Part Number 78-3648-xx). For information on CIP, refer to the Channel Interface Processor Microcode Release Notes and Upgrade Instructions (part number 78-4715-xx).

Introduction

These release notes discuss the following topics:

Documentation

Table 1 lists the related documentation for Cisco IOS Release 11.2 BC.

Note The most current Cisco IOS documentation can be found on the latest Documentation CD-ROM and on the World Wide Web at http://www.cisco.com. These electronic documents contain updates and modifications made after the paper documents were printed.


Table 1: Cisco IOS Documentation Set
Books Chapter Topics

· Configuration Fundamentals Configuration Guide

· Configuration Fundamentals Command Reference

Access Server and Router Product Overview

User Interface

System Images and Configuration Files

Using ClickStart, AutoInstall, and Setup

Interfaces

System Management

· Security Configuration Guide

· Security Command Reference

Network Access Security

Terminal Access Security

Accounting and Billing

Traffic Filters

Controlling Router Access

Network Data Encryption with Router Authentication

· Access Services Configuration Guide

· Access Services Command Reference

Terminal Lines and Modem Support

Network Connections

AppleTalk Remote Access

SLIP and PPP

XRemote

LAT

Telnet

TN3270

Protocol Translation

Configuring Modem Support and Chat Scripts

X.3 PAD

Regular Expressions

· Wide-Area Networking Configuration Guide

· Wide-Area Networking Command Reference

ATM

Dial-on-Demand Routing (DDR)

Frame Relay

ISDN

LANE

PPP for Wide-Area Networking

SMDS

X.25 and LAPB

· Network Protocols Configuration Guide, Part 1

· Network Protocols Command Reference, Part 1

IP

IP Routing

· 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

· 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 Support

SNA Frame Relay Access Support

APPN

NCIA Client/Server Topologies

IBM Channel Attach

· Cisco IOS Software Command Summary

· Access Services Quick Configuration Guide

· System Error Messages

· Debug Command Reference

· Cisco Management Information Base (MIB) User Quick Reference

These documents are available as printed manuals or electronic documents.

For electronic documentation of Release 11.2 BC router and access server software features, available on the Documentation CD-ROM, refer to the Cisco IOS Release 11.2 configuration guides and command references, located in the Cisco IOS Release 11.2 database.

Platform Support for Release 11.2 BC

Cisco IOS Release 11.2 BC supports the Cisco 7000 series routers with RSP and 7500 series routers. Table 2 summarizes the LAN and WAN interfaces and data rates supported on the Cisco 7000 and 7500 series routers.


Table 2: Supported Interfaces and Data Rates for Cisco 7000 and 7500 Series Routers
LAN Interfaces WAN Interfaces Data Rates

Ethernet (AUI)

EIA/TIA-232

48/56/64 kbps

Ethernet (10BaseT)

X.21

1.544/2.048 Mbps

Ethernet (10BaseFL)

V.35

34/45/52 Mbps

Fast Ethernet (100BaseTX)

EIA/TIA-449

Fast Ethernet (100BaseFX)

EIA-530

4-Mbps Token Ring

EIA/TIA-613 (HSSI)

16-Mbps Token Ring

ISDN PRI1

FDDI DAS

E1-G.703/G.704

FDDI SAS

FDDI multimode

FDDI single-mode

ATM Interface

Channel Interface

Second-Generation Channel Interface 2

Parallel Channel Adapter (Bus and Tag)

ESCON Channel Adapter (ECA)

Versatile Interface

Second-Generation Versatile Interface 2

MultiChannel Interface (Channelized E1/T1)

Packet-Over-SONET OC-3 Interface2

Synchronous Serial

1ISDN BRI is not supported in the Cisco 7000 and 7500 series routers.
2In the Cisco 7000 series routers (Cisco 7000 and Cisco 7010), these interfaces require Cisco 7000 with RP/SP or RP/SSP, or the Cisco 7000 Series Route Switch Processor (RSP7000) and the Cisco 7000 series Chassis Interface (RSP7000CI).

Cisco IOS Software Packaging

The Cisco IOS Release 11.2 BC is available in two basic feature sets for the Cisco 7000 series routers with RSPs and Cisco 7500 series routers:

Feature Set Tables

Table 3 describes the basic feature sets in the Cisco IOS Release 11.2 BC software.


Table 3: Basic Feature Sets in Cisco 7000 and 7500 Series Routers
Feature Feature Set in Enterprise and Enterprise and APPN1
LAN Support

Apollo Domain

AppleTalk 1 and 22

Banyan VINES

Concurrent routing and bridging (CRB)3

DECnet IV

DECnet V

GRE

Integrated routing and bridging (IRB)4

IP

LAN extension host

Multiring

Novell IPX5

OSI

Transparent and translational bridging

VLANs (ISL6 and IEEE 802.10)

XNS

XNS

WAN Services

ATM LAN emulation: DECnet routing, XNS routing, and Banyan VINES support

ATM LAN emulation: Hot Standby Router Protocol (HSRP) and
Simple Server Redundancy Protocol

ATM: Rate queues for SVC per subinterface

ATM: UNI 3.1 signaling for ATM

Combinet Packet Protocol (CPP)

Dialer profiles

Half bridge/half router for CPP and PPP

HDLC

IPXWAN 2.0

ISDN7

Multichassis Multilink PPP (MMP)

NetBEUI over PPP

PPP8

Virtual Private Dial-up Network (VPDN)

WAN Optimization

Bandwidth-on-demand

Custom and priority queuing9

Dial backup

Dial-on-demand

Header10, link and payload compression11

Named IP Access Control List

NetFlow Switching 12

Snapshot routing

Weighted fair queuing

IP Routing

Enhanced IGRP

Enhanced IGRP Optimizations

ES-IS

IGRP

IS-IS

Named IP Access Control List13

NHRP

Network Address Translation (NAT)14

On-Demand Routing

OSPF

OSPF Not-So-Stubby-Areas

OSPF On Demand Circuit (RFC 1793)

Protocol Independent Multicast (PIM)

Policy-based routing

RIP

RIP Version 2

Other Routing

AURP

IPX RIP

NLSP

RTMP

SMRP

SRTP

Multimedia and Quality of Service

Generic traffic shaping

Random Early Detection (RED)

Resource Reservation Protocol (RSVP)

Management

AutoInstall

Automatic modem configuration

HTTP Server

RMON events and alarms

SNMP

Telnet

Security

Access lists

Access security

Extended access lists

Kerberized login

Kerberos V client support

Lock and Key

MD5 routing authentication

RADIUS

TACACS+15

IBM Support

APPN (optional)

BAN for SNA Frame Relay support

Caching and filtering

DLSW+16, 17

Downstream PU concentration (DSPU)

Frame Relay SNA support (RFC 1490)

Native Client Interface Architecture (NCIA) Server

NetView Native Service Point

QLLC

Response Time Reporter (RTR)

SDLC integration

SDLC transport (STUN)

SDLC-to-LAN conversion (SDLLC)

SNA and NetBIOS WAN optimization via local acknowledgment

SRB/RSRB18

SRT

TG/COS

TN3270 Server (CIP only)

VIP and HSA

VIP and HSA19

VIP20

1In the Enterprise and APPN feature set in Cisco IOS Release 11.2, APPN includes APPN Central Registration (CRR) and APPN over DLSWw+.
2Includes AppleTalk load balancing.
3Concurrent routing and bridging feature only applies to transparent bridging, not source-route bridging (SRB).
4IRB is not supported on the Cisco 7000 series. On the Cisco 7500 series, IRB supports IP, IPX, and AppleTalk. It is supported for transparent bridging, but not for SRB. IRB is supported on all media-type interfaces except X.25 and ISDN bridged interfaces; and IRB and concurrent routing and bridging (CRB) cannot operate at the same time.
5The Novell IPX feature includes display SAP by name, IPX Access Control List violation logging, and plain-English IPX access lists.
6Note that the only IPX encapsulation supported in ISL is 802.3.
7ISDN support includes calling line identification (ANI), X.25 over the B channel, ISDN subaddressing, and applicable WAN optimization features. Asynchronous ISDN Access (V.120) is only supported in the Enterprise feature set.
8PPP includes support for LAN protocols supported by the feature set, address negotiation, PAP and CHAP authentication, and PPP compression.
9Custom priority and queuing is not currently supported on SMIP or MIP cards.
10IPX header compression (RFC 1553) is available in the feature sets that support IPX.
11X.25 and Frame Relay payload compression.
12NetFlow Switching is supported on the Cisco 7500 series and Cisco 7000 series with a Route Switch Processor (RSP) only. NetFlow Switching supports IP over all interfaces with optimal performance on Ethernet, FDDI, and HDLC.
13Named IP Access Control List can only be used by packet and route filters, it is not backward-compatible with earlier Cisco IOS releases, and is not supported with Distributed Fast Switching.
14On the Cisco 7000, NAT is supported with the RSP option only.
15TACACS+ Single Connection and TACACS+SENDAUTH enhancements are supported.
16DLSw+ over TCP/IP is supported.
17Cisco IOS Release 11.2 BC introduces several DLSw+ enhancements. See the section "IBM Functionality in Both Release 11.2 and Release 11.2 BC" for more details.
18SRB/RSRB is fast switched. This enhancement is on by default, but can be disabled.
19HSA support is available on the Cisco 7500 series only.
20VIP2 requires the RSP7000 for the Cisco 7000 series.

Table 4 describes optional feature sets for Cisco 7000 and Cisco 7500 series routers.


Table 4: Optional Feature Sets for Cisco 7000 and 7500 Series Routers
Optional Feature Set Licenses Specific Features
WAN Packet Protocols

ATM DXI

Frame Relay

Frame Relay switching

Frame Relay SVC support (DTE)

Frame Relay traffic shaping

SMDS over ATM

X.25

X.25 switching

Interdomain Routing

BGP

BGP41

EGP for Internet scale routing

VIP/VIP2 support

Included automatically with VIP order

CIP Support2

SNA support

TN3270 servers

NetFlow Switching

NetFlow Switching software

1BGP4 includes soft configuration, multipath support, and prefix filtering with inbound route maps.
2CIP orders must include one or more of the licenses.

Software Images and Memory Requirements for Release 11.2 BC

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.

Table 5 lists image names in Release 11.1 that have been replaced by new sets in Release 11.2 BC. If you normally use an image from Release 11.1 or earlier that is not available in Release 11.2 BC, use the equivalent image shown in Table 5. New images contain as many features as earlier ones and include features that are specific to Release 11.2 BC.

For Cisco routers to take advantage of the Release 11.2 BC features, you must upgrade the code or main system memory as listed in Table 6. Some platforms have specific chip or architecture requirements that affect what can be upgraded and in what increments.


Table 5: Image Name Mapping from Release 11.1 to Release 11.2 BC
for Cisco 7000 and Cisco 7500 Series Routers
Image Name in Release 11.1 or Earlier Image Name in Release
11.2 BC

rsp-aj-mz

rsp-ajsv-mz

rsp-j-mz

rsp-jsv-mz

rsp-ajv-mz

rsp-ajsv-mz

rsp-jv-mz

rsp-jsv-mz

Table 6 provides memory requirements for feature sets in Release 11.2 BC.


Table 6: Release 11.2 BC Memory Requirements
Router Minimum Required Code Memory Required Main Memory Release 11.2 BC Runs From
Cisco 7000 Series with RSP and 7500 Series1

Cisco 7513 only

All Others

Enterprise Set

16/20 MB Flash memory card

32 MB RAM

32 MB RAM

RAM

Enterprise/APPN Set

16/20 MB Flash memory card

32 MB RAM

32 MB RAM

RAM

1All feature sets for the Cisco7000 and Cisco 7500 Series include VIP support.

Microcode Software

Table 7 and Table 8 list the current microcode versions for the Cisco 7000 and Cisco 7500 series. These microcode software images are bundled with the system software image—with the exception of the CIP microcode (all system software images) and Versatile Interface Processor (VIP) microcode (certain system software images). Bundling eliminates the need to store separate microcode images. When the router starts, the system software unpacks the microcode software bundle and loads the proper software on all the interface processor boards. VIP and VIP2 microcode is bundled in all Cisco 7500 series feature sets listed in Table 7.

Note For the Cisco 7000 series, all boards must use the Level 10 or greater microcode that is bundled (except CIP) with the system image.


Table 7: Bundled Microcode Versions, by Release, for the Cisco 7000 Series
Processor or Module1
Cisco IOS Release AIP EIP FEIP FIP FSIP HIP MIP SP SSP TRIP VIP2

Minimum Version Required

10.15

10.1

10.4

10.2

10.18

10.2

12.0

11.15

11.15

10.3

22.20

11.2(1)

10.15

10.1

10.4

10.2

10.18

10.2

12.0

11.15

11.15

10.3

22.20

11.2(2)

10.15

10.1

10.4

10.2

10.18

10.2

12.0

11.15

11.15

10.3

22.20

11.2(3)

10.17

10.1

10.4

10.2

10.18

10.2

12.2

11.15

11.15

10.4

22.20

11.2(4)

10.17

10.1

10.4

10.2

10.19

10.2

12.2

11.15

11.15

10.4

22.20

11.2(5)

10.18

10.1

10.5

10.2

10.19

10.2

12.2

11.15

11.15

10.4

22.20

11.2(6)

10.19

10.1

10.6

10.2

10.19

10.2

12.2

11.15

11.15

10.4

22.20

11.2(7)

10.20

10.1

10.6

10.2

10.19

10.2

12.2

11.15

11.15

10.4

22.20

11.2(8)

10.20

10.1

10.6

10.2

10.19

10.3

12.2

11.15

11.15

10.4

22.20

11.2(9)

10.20

10.1

10.7

10.2

10.19

10.3

12.2

11.15

11.15

10.4

22.20

11.2(10)

10.22

10.1

10.7

10.2

10.19

10.3

12.2

11.15

11.15

10.4

22.20

11.2(11)

10.22

10.1

10.7

10.2

10.19

10.3

12.2

11.15

11.15

10.4

22.20

11.2(12a)

10.23

10.1

10.7

10.2

10.19

10.3

12.2

11.15

11.15

10.4

22.20

11.2(13)

10.23

10.1

10.7

10.2

10.19

10.3

12.2

11.15

11.15

10.4

22.20

11.2(14)

10.23

10.1

10.7

10.2

10.19

10.3

12.2

11.15

11.15

10.4

22.20

11.2(15)

10.25

10.1

10.7

10.2

10.19

10.3

12.2

11.15

11.15

10.4

22.20

11.2(16)

10.25

10.1

10.7

10.2

10.19

10.3

12.2

11.15

11.15

10.4

22.20

11.2(17)

10.25

10.2

10.7

10.2

10.19

10.3

12.2

11.15

11.15

10.4

22.20

11.2(18)

10.25

10.2

10.9

10.2

10.19

10.3

12.2

11.15

11.15

10.4

22.20

11.2(19)

10.25

10.2

10.9

10.2

10.19

10.3

12.2

11.15

11.15

10.4

22.20

11.2(20)

10.25

10.2

10.10

10.2

10.19

10.3

12.2

11.15

11.15

10.4

22.20

11.2(21)

10.25

10.2

10.10

10.2

10.19

10.3

12.2

11.15

11.15

10.4

22.20

Cisco IOS Release AIP EIP FEIP FIP FSIP HIP MIP SP SSP TRIP VIP3

11.2(22)

10.25

10.2

10.10

10.2

10.19

10.3

12.2

11.15

11.15

10.4

22.20

11.2(23)

10.25

10.2

10.10

10.2

10.19

10.3

12.2

11.15

11.15

10.4

22.20

1AIP (ATM Interface Processor), EIP (Ethernet Interface Processor), FEIP (Fast Ethernet Interface Processor), FIP (FDDI Interface Processor), FSIP (Fast Serial Interface Processor), HIP (HSSI Interface Processor), MIP (MultiChannel Interface Processor), SP (Switch Processor), SSP (Silicon Switch Processor), TRIP (Token Ring Interface Processor), VIP (Versatile Interface Processor).
2VIP microcode resides within the Cisco IOS software; it is not bundled in.
3VIP microcode resides within the Cisco IOS software; it is not bundled in.


Table 8: Bundled RSP Microcode Versions, by Release, for the Cisco 7500 Series
Processor or Module1
Cisco IOS Release AIP EIP FEIP FIP FSIP HIP MIP POSIP RSP22 TRIP VIP2 VIP22 VIP2C2,3

Minimum Version Required

20.8

20.2

20.3

20.1

20.4

20.0

22.0

20.0

20.0

20.0

22.20

22.20

22.20

11.2(1)

20.8

20.2

20.3

20.1

20.4

20.0

22.0

20.0

20.0

20.0

22.20

22.20

—

11.2(2)

20.8

20.2

20.3

20.1

20.4

20.0

22.0

20.0

20.0

20.0

22.20

22.20

22.20

11.2(3)

20.10

20.2

20.3

20.1

20.4

20.0

22.2

20.0

20.0

20.1

22.20

22.20

22.20

11.2(4)

20.10

20.2

20.3

20.1

20.6

20.0

22.2

20.0

20.0

20.1

22.20

22.20

22.20

11.2(5)

20.12

20.3

20.4

20.1

20.6

20.0

22.2

20.0

20.0

20.1

22.20

22.20

22.20

11.2(6)

20.12

20.3

20.5

20.1

20.6

20.0

22.2

20.0

20.0

20.1

22.20

22.20

22.20

11.2(7)

20.13

20.3

20.5

20.1

20.6

20.0

22.2

20.0

20.0

20.1

22.20

22.20

22.20

11.2(8)

20.13

20.3

20.5

20.1

20.8

20.1

22.2

20.0

20.0

20.1

22.20

22.20

22.20

11.2(9)

20.13

20.3

20.6

20.1

20.8

20.1

22.2

20.0

20.0

20.1

22.20

22.20

22.20

11.2(10)

20.15

20.3

20.6

20.1

20.8

20.1

22.2

20.0

20.0

20.1

22.20

22.20

22.20

11.2(11)

20.15

20.3

20.6

20.1

20.8

20.1

22.2

20.0

20.0

20.1

22.20

22.20

22.20

11.2(12a)

20.16

20.3

20.6

20.1

20.8

20.1

22.2

20.0

20.0

20.1

22.20

22.20

22.20

11.2(13)

20.16

20.3

20.6

20.1

20.9

20.1

22.2

20.0

20.0

20.1

22.20

22.20

22.20

11.2(14)

20.16

20.3

20.6

20.1

20.9

20.1

22.2

20.0

20.0

20.1

22.20

22.20

22.20

11.2(15)

20.18

20.3

20.6

20.4

20.9

20.2

22.2

20.0

20.0

20.2

22.20

22.20

22.20

11.2(16)

20.18

20.3

20.6

20.4

20.9

20.2

22.2

20.0

20.0

20.2

22.20

22.20

22.20

11.2(17)

20.18

20.3

20.6

20.4

20.9

20.2

22.2

20.0

20.0

20.2

22.20

22.20

22.20

11.2(18)

20.18

20.6

20.8

20.4

20.9

20.2

22.2

20.0

n/a

20.2

22.20

22.20

22.20

11.2(19)

20.18

20.6

20.8

20.4

20.9

20.2

22.2

20.0

n/a

20.2

22.20

22.20

22.20

11.2(20)

20.18

20.6

20.8

20.4

20.9

20.2

22.2

20.0

n/a

20.2

22.20

22.20

22.20

11.2(21)

20.18

20.6

20.8

20.4

20.9

20.2

22.2

20.0

n/a

20.2

22.20

22.20

22.20

11.2(22)

20.18

20.6

20.8

20.4

20.9

20.2

22.2

20.0

n/a

20.2

22.20

22.20

22.20

11.2(23)

20.18

20.6

20.8

20.4

20.9

20.2

22.2

20.0

n/a

20.2

22.20

22.20

22.20
1AIP (ATM Interface Processor), EIP (Ethernet Interface Processor), FEIP (Fast Ethernet Interface Processor), FIP (FDDI Interface Processor), FSIP (Fast Serial Interface Processor), HIP (HSSI Interface Processor), MIP (MultiChannel Interface Processor), POSIP (Packet over SONET OC-3 Interface Processor), RSP2 (Route Switch Processor), TRIP (Token Ring Interface Processor), VIP (Versatile Interface Processor), VIP2 (Second-Generation Versatile Interface Processor),VIP2C (Second-Generation Versatile Interface Processor—Encrypted).
2RSP2, VIP, VIP2, and VIP2C microcode reside within the Cisco IOS software; they are not bundled in.
3VIP2C was introduced in Release 11.2(2).

CIP Microcode

Beginning with Cisco IOS Release 11.1, the CIP microcode is no longer bundled with the Cisco IOS software image. You must have Flash memory installed on the Route Processor (RP) card and 8 MB RAM installed on your CIP card to use the IBM channel attach features in Cisco IOS Release 11.1 and later. See the "Important Notes" section for more information about CIP microcode.

Features in Release 11.2 and Release 11.2 BC

This section describes IBM network software features and support in Release 11.2 and Release 11.2 BC. Some features are available in both Release 11.2 and Release 11.2 BC; other features are available only in 11.2 BC.

For information on all new features in Release 11.2 and Release 11.2 BC, refer to the Release Notes for Cisco IOS Release 11.2.

IBM Functionality in Both Release 11.2 and Release 11.2 BC

This section describes IBM network software features available in both Cisco IOS Release 11.2 and Release 11.2 BC.

Features

The following new IBM software features were first available in Cisco IOS Release 11.2 and Release 11.2 BC:

  The NCIA Server supports SNA and NetBIOS sessions over a variety of LAN and WAN connections, including dialup connections. The NCIA architecture supports clients with full SNA stacks. This support provides all advanced SNA capabilities, unlike some split-stack solutions.
  NCIA Server enhancements provide:
  Note that each client is a full SNA PU with one or more LUs. As such, each device requires one LLC connection at the central site router. The Cisco 4700 currently supports 3000 to 4000 LLC connections.
  The TN3270 Server on the CIP supports up to 8000 concurrent sessions on a CIP and up to 16,000 concurrent sessions on a CIP2 card. The TN3270 Server offers the following advanced capabilities:
  TN3270 Server requires 32 MB of CIP DRAM to support up to 4000 sessions, 64 MB to support 8000 sessions, and 128 MB to support 16,000 sessions. TN3270 Server can run concurrently with any of the other CIP applications (IP Datagram, TCP/IP Offload, or CSNA), but operation of any of these features will affect the total number of sessions supported because of contention for CIP processor cycles.
  Fast Switched SR/TLB improves performance on all platforms by a factor of at least 2. It is ideal for IBM environments (for example, where low-cost Ethernet adapters are being installed on campus, but Token Ring connectivity to a FEP is still required) and for campus environments with a mix of Token Ring and Ethernet LANs and switches that rely on the Cisco IOS software for translational bridging.
  RTR enables the following functions to be performed:
  The RTR feature is currently available only with feature sets that include IBM support. A CiscoWorks Blue network management application will be available to support the RTR feature. Both the CiscoWorks Blue network management application and the router use the Cisco Round Trip Time Monitor (RTTMON) MIB. This MIB is available in both Release 11.2 and Release 11.2 BC.

APPN Enhancements

The following features have been added to Cisco's APPN software:

  The CDS reduces broadcast traffic in the network. Without an active CDS on ACF/VTAM, the NN must send a broadcast message to the network to locate nonlocal resources required for a session. With an active CDS, the NN sends a single request directly to the CDS for the location of the resource. A network broadcast is used only if the resource has not registered with the CDS.
  ACF/VTAM must be configured as a CDS. The Cisco IOS software NN learns of the capability when network topology is exchanged. To most effectively use the CDS, ENs should register the resources with the NN. Depending on the EN implementation, registration may occur automatically, may require configuration on the EN, or may not be a function of the EN.
  With the APPN DLUR MIB, users have access to information collected about the DLUR function in the Cisco IOS software NN and the DLUs attached to it for more complete network management information.

Data Link Switching+ (DLSw+) Features and Enhancements

The following features have been added to Cisco's DLSw+ software. These features had previously been available with Remote Source-Route Bridging (RSRB). To provide these features for DLSw+, the Cisco IOS software uses a component known as Virtual Data Link Control (VDLC) that allows one software component to use another software component as a data link.

  With this feature, LNM can be used to manage Token Ring LANs, Control Access Units, and Token Ring attached devices over a DLSw+ network. All management functions continue to operate as they would in an RSRB network or source-route bridged network.
  With this feature, NSP can be configured in remote routers, and DLSw+ can provide the path for the remote service point PU to communicate with NetView. This allows full management visibility of resources from a NetView 390 console, while concurrently offering the value-added features of DLSw+ in an SNA network.
  DSPU concentration consolidates the appearance of up to 255 PUs into a single PU appearance to VTAM, minimizing memory and cycles in central site resources (VTAM, NCP, and routers) and speeding network startup. Used in conjunction with DLSw+, network availability and scalability can be maximized.
  With this feature, DLSw+ can be used as a low-cost way to access an APPN backbone or APPN in the data center. In addition, DLSw+ can be used as a transport for APPN, providing nondisruptive recovery from failures and high-speed intermediate routing. In this case, the DLSw+ network appears as a connection network to the APPN NNs.
  This feature allows SRB over FDDI to provide the highest speed access between campus resources, while concurrently allowing DLSw+ for access to remote resources.
  Currently, SRB over FDDI is supported by the Cisco 7000 and Cisco 7500 series platforms only.

IBM Functionality in Release 11.2 BC Only

This section describes IBM network software features available only in Release 11.2 BC. These features are not available in Release 11.2. The following TN3270 server enhancements are described:

The following enhanced CLAW and offload support is described:

LU Address Mapping (Nailing)

LU address mapping allows a client IP address to be mapped, or "nailed," to one or more LU local addresses on one or more PUs by means of router configuration commands. You can control the relationship between the TN3270 client and the LU.

Using this feature, clients from traditional TN3270 (non-TN3270E) devices can connect to specific LUs, which overcomes a limitation of TN3270 devices that cannot specify a "CONNECT LU." LU nailing is also useful for TN3270E clients, because you can perform the configuration at the router, providing central control, rather than at the client.

Note Extensive use of the LU Address Mapping feature can result in large configurations. Refer to "Handling Large Configurations" for information on how to manage large configurations.

LU Model Matching

The LU selection algorithm attempts to match a client to a previously used LU that has the same terminal model type as the terminal model type requested by the client for this connection. If a match is found, that LU is used. If a match is not found, an LU which has not been used (since the PU was last activated) is the next choice. If all LUs have been used, an LU which is not currently in use is chosen. In this last case, it is necessary to impose a delay of three seconds during the connection process. This is to avoid a window in VTAM which can result in a Host application binding the terminal as the wrong model.

Where a client is "nailed" to use one of a limited set of LUs, the same selection logic is applied to choosing an LU from that set.

In the following example, LUs BAGE1004 and BAGE1005, which were connected, are now disconnected:

lu name client-ip:tcp nail state model frames in out idle for 1 BAGE1001 192.195.80.40:3822 Y P-BIND 327904E 4 4 0:22:35 2 BAGE1002 192.195.80.40:3867 Y ACT/SESS 327904E 8 7 0:21:20 3 BAGE1003 192.195.80.40:3981 Y ACT/SESS 327803E 13 14 0:10:13 4 BAGE1004 192.195.80.40:3991 Y ACT/NA 327803E 8 9 0:0:7 5 BAGE1005 192.195.80.40:3997 Y ACT/NA 327805 8 9 0:7:8

If the client at IP address 192.195.80.40 requests a terminal model of type IBM-3278-5, LU BAGE1005 will be selected over BAGE1004:

lu name client-ip:tcp nail state model frames in out idle for 1 BAGE1001 192.195.80.40:3822 Y P-BIND 327904E 4 4 0:23:29 2 BAGE1002 192.195.80.40:3867 Y ACT/SESS 327904E 8 7 0:22:14 3 BAGE1003 192.195.80.40:3981 Y ACT/SESS 327803E 13 14 0:11:7 4 BAGE1004 192.195.80.40:3991 Y ACT/NA 327803E 8 9 0:1:1 5 BAGE1005 192.195.80.40:4052 Y ACT/SESS 327805 13 14 0:0:16

Limiting LU Sessions

You can limit the number of LU sessions that can be established from a client IP address. This feature can control how many LU sessions a client IP address uses. For example, if a service bureau has 8,000 clients and each client IP address is limited to four LU sessions, you will never need more than 32,000 concurrent LU definitions even when the service is running at 100 percent capacity.

1646 Printer Support

Cisco provides full RFC 1646 printer support in the TN3270 server. There are no configuration tasks or other options required in the CIP to take advantage of this support. Prior versions of the TN3270 server feature provided RFC 1647 support.

Function Management Header (FMH) Support

FMH support is provided in the context of providing printer support for the Kanji character set. There are no configuration tasks or other options required in the CIP to take advantage of this support.

When a client does not support FMH and the host sends an FMH, the client will report a bad data stream or print random data. Prior to TN3270 server support of FMH, when a host sent an FMH the session would be unbound.

With suitable host and client software, you can now print double-byte character set characters over an LU type 1 session.

Unformatted System Services Table (USSTAB) Conversion

The TN3270 server now translates the host SNA character string (SCS) to 3270DS. In the initial release of TN3270 server, you were required to set up the host to provide VTAM's USSTAB messages as either SCS or 3270 data stream (DS) data, depending on the needs of the client. That requirement no longer exists.

A real 3274 can run in SNA or non-SNA mode. In non-SNA mode, the terminals expect all data in 3270DS. In SNA mode, the terminals expect the LU-LU session to use 3270DS, but the system services control point (SSCP)-to-LU session from the host are expected to use SCS data.

The TN3270 architecture is modeled on non-SNA 3270, whereas the CIP TN3270 Server resembles the SNA 3270 to the host. TN3270E is modeled on SNA 3270, so different clients require different datastreams.

With the USSTAB conversion feature, the SCS data is converted automatically for clients that always require 3270DS data. There are no configuration tasks or other options required in the CIP to take advantage of this support.

IP Type of Service and Precedence Setting

The TN3270 server supports IP type of service (TOS) precedence setting. TOS is used in router networks to make routing decisions for the generated IP packets. The TN3270 server generates packets that comply to IP TOS/precedence values. (Refer to RFC 1349 for a description of IP TOS/precedence.)

The Cisco implementation of IP precedence allows values of 0 to 7 while TOS allows values from 0 to 15. You must choose appropriate values for TN3270 screens and printers consistent with your organization's policy.

At the protocol level, IP precedence allows a router network to discriminate between different types of traffic by giving different priorities to them. IP TOS allows router networks to discriminate between different types of traffic by giving different routing characteristics to them. Precedence and TOS values complement one another and provide flexibility in managing your network traffic.

In TN3270 server, two types of TN3270 clients connect: interactive screens or printers. Screens are interactive while printers need bulk data transfer. IP TOS/precedence allows you to discriminate between those two types of sessions and assign different precedence values to the interactive connection and the bulk data connection.

IP TOS/precedence values can be specified either at the TN3270 server command level or on the individual PU command level. Values can be specified on both levels, in which case siftdown will be used to determine value on individual PU. Siftdown is used when you configure values in TN3270 server configuration mode that apply to all entities in the server, yet you still can configure individual PUs at the PU configuration mode to alternative values. PU values not specifically changed use the values configured at the TN3270 server configuration mode. This flexibility provides a powerful, yet efficient, way to manage the values.

LU Pooling and Response Time MIB

The LU Pooling and Response Time MIB feature provides the following enhancements to the TN3270 server feature on the Cisco 7500 series router:

IP Host Backup

The IP Host Backup feature permits the mainframe operating system to be moved from one mainframe to another without requiring a change to the router configuration at the time of the move.

Note IP Host Backup does not provide single-system image or automatic failover to a waiting backup application. Host operator action on the mainframe is required in these instances.

Multiple mainframes can be connected to a single CIP by means of an ESCON director. Often, these mainframes run using the Multiple Image Facility (MIF), which permits the physical machine to be divided into multiple logical partitions (LPARs). By defining an unused partition on another mainframe, a user can move the operating system from a failed mainframe or mainframe partition to the unused partition. By having multiple paths to each device, the move is accomplished without changing the mainframe software. This function also permits moving an IP stack between multiple operating system images.

On the CIP, each IP connection is treated as a physical device. The CIP does not support multiple paths to a single IP connection (or device). Prior to IP Host Backup, the router configuration had to be changed each time the mainframe operating system was moved from one mainframe or LPAR to another.

CLAW Packing

The Cisco IOS implements the CLAW channel protocol to transport data between the mainframe and the Cisco CIP in TCP/IP environments. The CLAW Packing feature is an enhancement to the CLAW support which enables the transport of multiple IP packets in a single channel operation and significantly increases throughput performance between a mainframe and a Cisco CIP. CLAW Packing is supported on the Cisco 7500 series.

Currently, IBM's TCPIP stack does not support the CLAW Packing feature. However, the original implementation of the CLAW IP datagram support will continue to work with IBM's stack, even concurrently with the CLAW Packing feature.

Important Notes

This section describes warnings and cautions about using the IBM network software features in Cisco IOS Release 11.2 and Cisco IOS Release 11.2 BC software. The following topics are discussed:

Upgrading to a New Software Release

If you are upgrading to Cisco IOS Release 11.2 or Release 11.2 BC from an earlier Cisco IOS software release, you should save your current configuration file before installing the Release 11.2 or Release 11.2 BC software on your router.

CIP Microcode

CIP microcode is now available as a separate image, unbundled from the Cisco IOS image. CIP microcode (for the CIP or Second-Generation CIP [CIP2] card) resides only in router Flash memory as multiple files. The router loads a "kernel" to the CIP (based on hardware revision), and the CIP selectively loads and relocates the software it requires from the router's Flash memory. The CIP image is available on preloaded Flash memory cards, on a floppy disk, or via FTP from Cisco. Every version of Cisco IOS Release 11.2 has a corresponding version of CIP microcode. Refer to the Channel Interface Processor (CIP) Microcode Release Note and Microcode Upgrade Requirements publication (Document Number 78-4715-xx) for information about the recommended pairs of Cisco IOS Release 11.2 and CIP microcode.

Consider the following before using Cisco IOS Release 11.2, Release 11.2 BC, and CIP microcode:

When the CIP image is copied to an existing Flash memory card, the existing flash copy commands are used, just as before. If a CIP image other than the default for the release is being used, then the microcode cip flash configuration command must be issued.

The show microcode command has been expanded to display the default CIP image name for the Cisco IOS release.

Note The router must already be running Cisco IOS Release 11.2 before performing a copy of the CIP image to Flash memory because the CIP image must be "exploded" from the single image file on the TFTP server to multiple files in Flash memory. This capability was first available in Release 11.1.

There are two ways to determine what is loaded on each CIP:

Multiple CIP cards of different hardware revisions can run in the same router.

Netbooting from VIP

To netboot from Ethernet or Fast Ethernet ports on a VIP card, the system must contain version 11.1 boot ROMs. If the system contains version 11.0 boot ROMs, you can work around this requirement by using the boot bootldr device:filename global configuration command to load a bootstrap image from Flash memory.

Source-Route Bridging (SRB) over FDDI

This feature supports forwarding of source-route bridged traffic between Token Ring and FDDI interfaces on the Cisco 7000, Cisco 7010, and Cisco 7500 series routers. Previously, the only way to transport SNA and NetBIOS over FDDI was with remote source-route bridging (RSRB), which is either fast switched (direct or Fast-Sequence Transport (FST) encapsulation) or process-switched (TCP encapsulation). With SRB over FDDI, traffic can be autonomously switched, greatly improving performance for SRB traffic that uses FDDI as a backbone. This feature eliminates the need for RSRB peer definitions to connect Token Ring networks over the FDDI backbone.

Note SRB over FDDI does not support RSRB traffic forwarded to RSRB peers. Routers that have connections to local Token Ring networks as well as RSRB connections to remote networks cannot use this feature. The workaround is to move the RSRB connections to routers that are not connected to the FDDI backbone.

Using AIP Cards

Cisco 7000 series ATM Interface Processor (AIP) cards that support E3, DS3, or Transport Asynchronous Transmitter/Receiver Interface (TAXI) connections and that were shipped after February 22, 1995, require Cisco IOS Release 10.0(9), 10.2(5), 10.3(1), or later.

Using LAN Emulation (LANE)

Note the following information regarding the LAN Emulation (LANE) feature in Cisco IOS Release 11.2 and Release 11.2 BC:

Caveats

Caveats describe unexpected behavior or defects in Cisco IOS software releases. The software caveats that apply to Cisco IOS Release 11.2 also apply to Cisco IOS Release 11.2 BC. Additional CIP-related caveats also apply.

  An error can occur with management protocol processing. Please use the following URL for further information:
  http://www.cisco.com/cgi-bin/bugtool/onebug.pl?bugid=CSCdw65903  

Refer to the following documents to find caveat information for Cisco IOS Release 11.2 BC:

Note If you have an account with CCO, you can use Bug Navigator II to find caveats of any severity for any release. From the CCO home page, log in and click on this path: Service&Support: Online Technical Support: Software Bug Toolkit. You can also find Bug Navigator II at http://www.cisco.com/support/bugtools.

Handling Large Configurations

The largest size nonvolatile random-access memory (NVRAM) planned for the Cisco 7000 and 7500 series routers is 128 KB. The maximum number of nailing commands that can be stored in a 128 KB NVRAM is approximately 4000. However, large configurations may map as many as 10,000 IP addresses to LUs.

To maintain a configuration file that exceeds 128 KB there are two alternatives. The configuration file can be stored compressed in NVRAM. Or, the configuration file can be stored in Flash memory that is either internal Flash or on a PCMCIA card.

NVRAM Configuration File Compression

The service compress-config global command specifies that the configuration file is to be stored compressed in NVRAM. Once the configuration file has been compressed, the router functions normally. A show startup-config EXEC command expands the configuration before displaying it. When the system is booted, it recognizes that the configuration file is compressed and will expand it and proceed normally.

This example compresses a 129 KB configuration file to 11 KB:

router# copy running-config startup-config Building configuration... Compressing configuration from 129648 bytes to 11077 bytes [OK]

The size of the configuration must not exceed three times the NVRAM size. For a 128 KB size NVRAM, the largest expanded configuration file size is 384 KB.

Note This compression facility is only available with Cisco IOS Software Release 10 boot ROMs or later.

If the boot ROMs do not recognize a compressed configuration, the following message is displayed:

Boot ROMs do not support NVRAM compression Config NOT written to NVRAM
Store Configuration File in Flash

Store the startup configuration file in Flash memory by entering the boot config slot0:router-config global command. This command sets the environment variable CONFIG_FILE to load the startup configuration (router-config) from Flash memory, which is PCMCIA slot0 in this case. The buffer that holds the configuration file is usually the size of NVRAM. Larger configurations need larger buffers. To adjust the buffer size, use the boot buffersize bytes global command.

Note that you must do a copy startup-config slot0:router-config command prior to the boot config slot0:router-config to create the Flash configuration file. After you have created the Flash configuration file, update the Flash again.

For example, the following commands store the configuration file in Flash memory:

copy startup-config slot0:router-config conf t   boot buffersize <bytes>   boot config slot0:router-config copy running-config startup-config

Care must be taken when editing or changing a large configuration. Flash memory space is used every time a copy running-config startup-config is issued. Because file management for Flash memory, such as optimizing free space, is not done automatically you must pay close attention to available Flash memory. Cisco recommends that you use a large-capacity Flash card of at least 20 MB.

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:

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 and select Documentation. After you complete the form, click Submit to send it to Cisco. We appreciate your comments.





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Posted: Mon Mar 4 14:02:03 PST 2002
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