Table Of Contents
Release Notes for Cisco IOS Release 12.0(9)ST
Determining the Software Version
New Features in Release 12.0(9)ST
MPLS Support on Dynamic Packet Transport
Open Caveats—Release 12.0(9)ST
Cisco IOS Software Documentation Set
Release 12.0 Documentation Set
Obtaining Technical Assistance
Release Notes for Cisco IOS Release 12.0(9)ST
May 5, 2000
Text Part Number 78-10968-01
These release notes for Cisco 7000 family and Cisco 12000 series routers support Cisco IOS Release 12.0(9)ST. Release 12.0(9)ST is the first limited release of the Cisco IOS 12.0 ST release series. These release notes are updated, as needed, to describe new features, memory requirements, hardware supported, software platform deferrals, and changes to the microcode and related documents.
Cisco IOS Release 12.0 ST is based on Cisco IOS Release 12.0 S and Release 12.0, and is currently tailored to provide new MPLS features in service provider environments. Release 12.0 S is the follow-on release to Release 11.1 CC, which was also targeted to the service provider environment. Additionally, many of the features in Release 12.0 S were first introduced for the Cisco 12000 series routers in Release 11.2 OS and for the Cisco 7000 family in Release 12.0 T.
Use these release notes in conjunction with the Release Notes for Cisco IOS Release 12.0 and Release 12.0 S located on Cisco Connection Online (CCO) and the Documentation CD-ROM.
In addition to the caveats listed in the "Caveats" section, the software caveats that apply to Release 12.0 and Release 12.0 S also apply to Release 12.0 ST. For information on other caveats that might apply to Cisco IOS Release 12.0 ST, refer to the caveats documents for Release 12.0 and Release 12.0 S that are located on CCO and on the Documentation CD-ROM.
Contents
These release notes contain the following sections:
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Obtaining Technical Assistance
Introduction
Cisco IOS Release 12.0(9)ST is the first public, but limited release of this software. Release 12.0(9)ST is synchronized to Cisco Release 12.0(9)S. Many of the features and the hardware supported in this software were previously released to customers in other software releases. For information on new features and Cisco IOS commands supported by Release 12.0(9)ST, see the "New and Changed Information" section and the "Related Documentation" section.
System Requirements
This section describes the following system requirements for Release 12.0(9)ST:
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Memory Requirements
Table 1, Table 2, and Table 3 list the memory requirements for the platforms supported in Cisco IOS Release 12.0(9)ST.
Table 1 Memory Requirements for the Cisco 7200 Series Platform
Flash MemoryService Provider
c7200-p-mz
16 MB
128 MB
RAM
Table 2 Memory Requirements for the Cisco 7500/RSP Series Platform
Flash MemoryService Provider
rsp-pv-mz
16 MB
128 MB
RAM
Table 3 Memory Requirements for the Cisco 12000/GSR Series Platform
Flash MemoryService Provider
gsr-p-mz
16 MB
128 MB
RAM
Hardware Supported
Cisco IOS Release 12.0(9)ST supports the following platforms:
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Determining the Software Version
To determine the version of Cisco IOS software currently running on your Cisco router, log in to the router and enter the show version EXEC command. The following is sample output from the show version command. The version number is indicated on the second line.
Cisco Internetwork Operating System SoftwareIOS (tm) 7200 Software (C7200-P-M), Version 12.0(9)ST, RELEASE SOFTWAREAdditional command output lines include more information, such as processor revision numbers, memory amounts, hardware IDs, and partition information.
Microcode Software
Table 4 lists the current microcode versions for the Cisco 7500/RSP series. This series includes the Cisco 7500 series routers.
Microcode software images are bundled with the system software image, except for the Channel Interface Processor (CIP) microcode (all system software images) and the 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 into all Cisco 7500 series feature sets listed in Table 4.
For further information about the CIP microcode, refer to the Cisco document Channel Interface Processor Microcode Release Note and Microcode Upgrade Instructions.
Feature Set Tables
The Cisco IOS software is packaged in feature sets consisting of software images. Each feature set contains a specific set of Cisco IOS features.
Different platforms support different feature sets. Table 5, Table 6, and Table 7 list the newest features and feature sets supported by the Cisco 7200 series, the Cisco 7500/RSP series, and the Cisco 12000 series in Cisco IOS Release 12.0 ST and use the following conventions:
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New and Changed Information
Refer to New Features in Release 12.0(9)ST.
New Features in Release 12.0(9)ST
Release 12.0(9)ST supports the following new features:
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MPLS Support on Dynamic Packet Transport
Dynamic Packet Transport (DPT) offers the reliability and restorability typically associated with SONET/SDH transport, without adding unnecessary overhead to IP traffic.
DPT uses dual counter-rotating fiber rings that can concurrently transport data and control traffic. DPT uses the Spatial Reuse Protocol (SRP), which is the media-independent Media Access Control (MAC) layer protocol, for addressing packets, stripping packets, controlling bandwidth, and controlling message propagation on the packet ring.
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DPT (OC-12/STM4) is supported for forwarding and label distribution on the following:
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DPT combines the bandwidth-efficient and service-rich capabilities of IP routing with the bandwidth-rich, self-healing capabilities of fiber rings to deliver fundamental cost and functionality advantages over existing solutions.
MPLS Traceroute
MPLS-aware traceroute functionality has been added to the traceroute program. When you enter the traceroute user EXEC command, the display output includes the IP address of the router interface through which the traceroute packet is passing, followed by the MPLS label information and the normal trace/ping information.
The following is sample output from the traceroute command:
router-A# traceroute 14.0.0.1Type escape sequence to abort.Tracing the route to 14.0.0.11 10.0.0.2 [MPLS: Label 138 Exp 0] 0 msec 0 msec 4 msec2 11.0.0.2 [MPLS: Label 138 Exp 0] 0 msec 0 msec 0 msec3 14.0.0.1 4 msec 0 msecMPLS Virtual Private Networks
A virtual private network (VPN) is a secure IP-based network that uses a shared backbone to distribute resources on one or more physical networks located in geographically dispersed sites. MPLS-based VPNs enable highly scalable, highly flexible IP VPNs in Layer 3 without tunneling or encryption.
MPLS VPNs have the following advantages over the current IP VPN solutions relying on Layer 2 VC, Layer 3 tunnels, or encryption:
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End users do not have to modify their IP applications or support MPLS.
MPLS-based VPNs support a variety of Layer 2 technologies (ATM, Frame Relay, Packet over SONET (PoS), and multi-access) for customer access, and in the provider's backbone.
Line cards supported for GSR include
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Multiprotocol BGP
Multiprotocol BGP provides extensions to BGP-4 per IETF RFC 2283, Multiprotocol Extensions for BGP-4. T. Bates, R. Chandra, D. Katz, and Y. Rekhter. February 1998. (Format: TXT=18946 bytes) (Status: PROPOSED STANDARD).
These extensions enable multiprotocol BGP to carry different address families. In Release 12.0(9)ST, multiprotocol BGP supports the distribution of multicast and MPLS VPN routes. In the future, these multiprotocol BGP extensions will support the distribution of IPv6 routes.
Caveats
Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most serious caveats; severity 2 caveats are less serious.
This section contains only open caveats for the current Cisco IOS 12.0(9)ST release.
Because Cisco IOS Release 12.0 ST and Release 12.0 S are based on Release 12.0, many caveats that apply to Release 12.0 apply to Release 12.0(9)ST. For information on severity 1 and 2 caveats in Cisco IOS Release 12.0, see Caveats for Cisco IOS Release 12.0. It is located on CCO and the Documentation CD-ROM.
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Open Caveats—Release 12.0(9)ST
This section describes possibly unexpected behavior by Release 12.0(9)ST. This section describes only severity 1 and 2 caveats.
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The ATM SAR cannot catch up with the reassembly of ATM cells. This occurs when certain fixed test pattern sizes are sent to the SAR repeatedly. According to the SAR manufacturer, this is a limitation within the SAR.
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Removing 200+ traffic engineering tunnels from a router with many routing table entries (60K BGP and 10K OSPF routes) causes CPU Hog messages and possible IPC traceback messages. Networks with less than 5K OSPF routes in the routing table are not affected.
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A 7500 series router performing tag imposition in the distributed switching path may have one or more of its output (tag) interfaces in an output stuck state. This problem has occurred on ATM and POS interfaces in Release 12.0(8.6)ST3 and Release 12.0(10)S.
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When 1100 AToM tunnels with 800 ATM PVCs are configured on the OC-12 ATM card, GSR interprocessor communication is temporarily blocked. Communication between the line card and the route processor on the GSR resumes shortly.
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On parallel links, when one of the links is shut, the entries are not correctly removed from the tab forwarding table.
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In Release 12.0 ST, commands that include the nlri keyword are recognized only when the system is started.
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When you configure 25 VPNs between a customer edge router (CE) and a Series 12000 provider edge router (PE) with an OC-12 ATM line card with 25 subinterfaces, Cisco Express Forwarding is occasionally disabled for between 2 and 10 minutes.
Related Documentation
The following sections describe the documentation available for the Cisco 7000 family and Cisco 12000 series routers. These documents consist of hardware and software installation guides, Cisco IOS configuration and command reference publications, system error messages, feature modules, and other documents.
Documentation is available as printed manuals or electronic documents except for feature modules, which are available online on CCO and the Documentation CD-ROM.
Use these release notes with these documents:
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Release-Specific Documents
The following documents are specific to Release 12.0 and are located on CCO and the Documentation CD-ROM.
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On CCO at:
Technical Documents > Documentation Home Page > Cisco IOS Software Configuration > Cisco IOS Release 12.0 > Release Notes > Cross-Platform Release Notes
On the Documentation CD-ROM at:
Cisco Product Documentation > Cisco IOS Software Configuration > Cisco IOS Release 12.0 > Release Notes > Cross-Platform Release Notes
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Technical Documents
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As a supplement to the caveats listed in the "Caveats" section in these release notes, see Caveats for Cisco IOS Release 12.0, which contains caveats applicable to all platforms for all maintenance releases of Release 12.0.
On CCO at:
Technical Documents > Documentation Home Page > Cisco IOS Software Configuration > Cisco IOS Release 12.0 > Caveats
On the Documentation CD-ROM at:
Cisco Product Documentation > Cisco IOS Software Configuration > Cisco IOS Release 12.0 > Caveats
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Platform-Specific Documents
These documents are available for the Cisco 7000 family and Cisco 12000 series routers on CCO and the Documentation CD-ROM:
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On CCO at:
Technical Documents > Documentation Home Page > Core/High-End Routers
On the Documentation CD-ROM at:
Cisco Product Documentation > Core/High-End Routers
Feature Modules
Feature modules describe new features supported by Release 12.0 S and Release 12.0 ST; they are updates to the Cisco IOS documentation set. A feature module consists of a brief overview of the feature, benefits, configuration tasks, and a command reference. As updates, the feature modules are available online only. Feature module information is incorporated in the next printing of the Cisco IOS documentation set.
On CCO at:
Technical Documents > Documentation Home Page > Cisco IOS Software Configuration > Cisco IOS Release 12.0 > New Feature Documentation > New Features in 12.0-Based Limited Lifetime Releases > New Features in Release 12.0 ST
On the Documentation CD-ROM at:
Cisco Product Documentation > Cisco IOS Software Configuration > Cisco IOS Release 12.0 > New Feature Documentation > New Features in 12.0-Based Limited Lifetime Releases > New Features in Release 12.0 ST
Table 8 describes the contents of the Cisco IOS Release 12.0 S feature modules.
Cisco IOS Software Documentation Set
The Cisco IOS software documentation set consists of the Cisco IOS configuration guides, Cisco IOS command reference publications, and several other supporting documents that are shipped with your order in electronic form on the Documentation CD-ROM—unless you specifically ordered the printed versions.
Documentation Modules
Each module in the Cisco IOS documentation set consists of two books: a configuration guide and a corresponding command reference. Chapters in a configuration guide describe protocols, configuration tasks, and Cisco IOS software functionality, and they contain comprehensive configuration examples. Chapters in a command reference provide complete command syntax information. Use each configuration guide with its corresponding command reference.
On CCO and the Documentation CD-ROM, two master hot-linked documents provide information for the Cisco IOS software documentation set.
You can reach these documents on CCO at:
Technical Documents > Documentation Home Page > Cisco IOS Software Configuration > Cisco IOS Release 12.0 > Configuration Guides and Command References
You can reach these documents on the Documentation CD-ROM at:
Cisco Product Documentation > Cisco IOS Software Configuration > Cisco IOS Release 12.0 > Configuration Guides and Command References
Release 12.0 Documentation Set
Table 9 describes the contents of the Cisco IOS Release 12.0 software documentation set, which is available in electronic form and in printed form upon request.
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You can reach the Cisco IOS documentation set on CCO at:
Technical Documents > Documentation Home Page > Cisco IOS Software Configuration > Cisco IOS Release 12.0
You can reach the Cisco IOS documentation set on the Documentation CD-ROM at:
Cisco Product Documentation > Cisco IOS Software Configuration > Cisco IOS Release 12.0
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Obtaining Documentation
World Wide Web
You can access the most current Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.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 is updated monthly. Therefore, it is probably more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.
Ordering Documentation
Registered CCO users can order the Documentation CD-ROM and other Cisco Product documentation through our online Subscription Services at http://www.cisco.com/pcgi-bin/subcat/kaojump.cgi.
Nonregistered CCO users can order documentation through a local account representative by calling Cisco's corporate headquarters (California, USA) at 408 526-4000 or, in North America, call 800 553-NETS (6387).
Obtaining Technical Assistance
Cisco provides Cisco Connection Online (CCO) as a starting point for all technical assistance. Warranty or maintenance contract customers can use the Technical Assistance Center. All customers can submit technical feedback on Cisco documentation using the web, e-mail, a self-addressed stamped response card included in many printed docs, or by sending mail to Cisco.
Cisco Connection Online
Cisco continues to revolutionize how business is done on the Internet. Cisco Connection Online is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information and resources at anytime, from anywhere in the world. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco.
CCO's broad range of features and services helps customers and partners to streamline business processes and improve productivity. Through CCO, you will find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online support services, download and test software packages, and order Cisco learning materials and merchandise. Valuable online skill assessment, training, and certification programs are also available.
Customers and partners can self-register on CCO to obtain additional personalized information and services. Registered users may order products, check on the status of an order and view benefits specific to their relationships with Cisco.
You can access CCO in the following ways:
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You can e-mail questions about using CCO to cco-team@cisco.com.
Technical Assistance Center
The Cisco Technical Assistance Center (TAC) is available to warranty or maintenance contract customers who need technical assistance with a Cisco product that is under warranty or covered by a maintenance contract.
To display the TAC web site that includes links to technical support information and software upgrades and for requesting TAC support, use www.cisco.com/techsupport.
To contact by e-mail, use one of the following:
In North America, TAC can be reached at 800 553-2447 or 408 526-7209. For other telephone numbers and TAC e-mail addresses worldwide, consult the following web site: http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml.
Documentation Feedback
If you are reading Cisco product documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco.
You can e-mail your comments to bug-doc@cisco.com.
To submit your comments by mail, for your convenience many documents contain a response card behind the front cover. Otherwise, you can mail your comments to the following address:
Cisco Systems, Inc.
Document Resource Connection
170 West Tasman Drive
San Jose, CA 95134-9883We appreciate and value your comments.
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