Release Notes for the Cisco 1700 Series Routers for Cisco IOS Release 12.2(13)ZF
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Release Notes for the Cisco 1700 Series Routers for Cisco IOS Release 12.2(13)ZF
Determining the Software Version
Upgrading to a New Software Release
New Software Features in Release 12.2(13)ZF
New Software Features in Release 12.2(13)T
Resolved Caveats for Release 12.2(13)ZF2
Open Caveats for Release 12.2(13)ZF
Resolved Caveats for Release 12.2(13)ZF
Obtaining Technical Assistance
Release Notes for the Cisco 1700 Series Routers for Cisco IOS Release 12.2(13)ZF
August 8, 2003
These release notes describe new features and significant software components for the Cisco 1700 series routers that support Cisco IOS Release 12.2 T, up to and including Release 12.2(13)ZF2. These release notes are updated as needed to describe new memory requirements, new features, new hardware support, software platform deferrals, microcode or modem code changes, related document changes, and any other important changes. Use these release notes with the Cross-Platform Release Notes for Cisco IOS Release 12.2 T located on Cisco.com and the Documentation CD.
For a list of the software caveats that apply to Release 12.2(13)ZF2, see the "Caveats" and the online Caveats for Cisco IOS Release 12.2 T document. The caveats document is updated for every 12.2 T maintenance release and is located on Cisco.com and the Documentation CD.
Contents
These release notes discuss the following topics:
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Obtaining Technical Assistance
System Requirements
This section describes the system requirements for Release 12.2(13)ZF2 and includes the following sections:
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Memory Requirements
Table 1 describes the memory requirements for the Cisco IOS feature sets supported by Cisco IOS Release 12.2(13)ZF2 on the Cisco 1700 series routers.
Hardware Supported
Cisco IOS Release 12.2(13)ZF2 supports the following Cisco 1700 series routers:
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The Cisco 1710 and Cisco 1721routers run data images only. The Cisco 1751, 1751-V, 1760, and 1760-V routers run data or data-and-voice images, providing digital and analog voice support.
For descriptions of existing hardware features and supported modules, see the hardware installation guides, configuration and command reference guides, and additional documents specific to the Cisco 1700 series routers, which are available on Cisco.com and the Documentation CD at the following location:
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/1700/index.htmThis URL is subject to change without notice. If it changes, point your web browser to Cisco.com, and click the following path:
Cisco Product Documentation: Access Servers and Access Routers: Modular Access Routers: Cisco 1700 Series Routers: <platform_name>Determining the Software Version
To determine which version of Cisco IOS software currently running on your Cisco 1700 series router, log in to the router and enter the show version EXEC command. The following sample output from the show version command indicates the version number.
router> show versionCisco Internetwork Operating System SoftwareIOS (tm) C1700 Software (C1700-NY-MZ), Version 12.2(13)ZF2, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)Synched to technology version 12.2(13.1u)TUpgrading to a New Software Release
For general information about upgrading to a new software release, see Software Installation and Upgrade Procedures located at http://www.cisco.com/warp/public/130/upgrade_index.shtml.
Feature Set Tables
The Cisco IOS software is packaged in feature sets consisting of software images, depending on the platform. Each feature set contains a specific set of Cisco IOS features. Release 12.2(13)ZF2 supports the same feature sets as Releases 12.2 and 12.2(8)T, but Release 12.2(13)ZF2 includes new features supported by the Cisco 1700 series routers.
Caution
Table 2 through Table 4 list the features and feature sets supported in Cisco IOS Release 12.2(13)ZF2.
The tables use the following conventions:
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New and Changed Information
The following sections list the new software features supported by the Cisco 1700 series routers for Release 12.2(13)ZF.
New Software Features in Release 12.2(13)ZF
The following sections describe the new software features supported by the Cisco 1700 series routers for Release 12.2(13)ZF.
Frame Relay SVCs Over ISDN
This feature supports Frame Relay (FR) switched virtual circuits (SVCs) over an ISDN line. A common use of the functionality in network topology is to put it as a backup route. This feature enables the support of current FR SVC function on an ISDN BRI interface, as if running on a serial line. FR switching does not work with this feature.
DHCP Authorized ARP
This feature enhances the Dynamic Host Configuration Protocol (DHCP) and Address Resolution Protocol (ARP) components of the Cisco IOS to limit the leasing of IP addresses to mobile users to authorized users.
A new command line interface (CLI) arp authorized command is defined to enable this feature.
Configuration Example
Consider the routers R1 and R2. R1 is the DHCP server that assigns IP addresses to the routers that are seeking IP addresses, and R2 is configured to obtain its IP address through DHCP server. Since ARP update is configured on R1, it will install a secure ARP entry in its ARP table. The arp authorized command stops any dynamic ARP on that interface. R1 will send periodic ARPs to R2 to make sure that the client is still active; the client (R2) responds with an ARP reply. The timer for the entry is refreshed on R1 upon receiving the response.
The following example shows configuration of R1 DHCP server:
ip dhcp pool testing_poolnetwork 10.0.0.0 255.255.255.0lease 0 0 20update arp!interface Ethernet0ip address 10.0.0.1 255.255.255.0half-duplexarp authorizedarp timeout 60The following example shows configuration of R2 DHCP client.
interface Ethernet0/0ip address dhcphalf-duplexThe following is the output for the sh arp command on R1
R1#sh arpProtocol Address Age (min) Hardware Addr Type InterfaceInternet 10.0.0.3 0 0004.dd0c.ffcb ARPA Ethernet01Internet 10.0.0.1 - 0004.dd0c.ff86 ARPA Ethernet0The following is the output for the sh arp command on R2
R2#sh arpProtocol Address Age (min) Hardware Addr Type InterfaceInternet 10.0.0.3 - 0004.dd0c.ffcb ARPA Ethernet0/02Internet 10.0.0.1 0 0004.dd0c.ff86 ARPA Ethernet0/0New Software Features in Release 12.2(13)T
For information regarding the features supported in Cisco IOS Release 12.2 T, refer to the Cross-Platform Release Notes and New Feature Documentation links at the following location on Cisco.com:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122relnt/xprn122t/index.htm
This URL is subject to change without notice. If it changes, point your web browser to Cisco.com, and click the following path:
Service & Support: Technical Documents: Cisco IOS Software: Release 12.2: Release Notes: Cross-Platform Release Notes (Cisco IOS Release 12.2T)
Important Notes
The following sections describe important notes concerning the new software features supported by the Cisco 1700 series routers for Release 12.2(13)ZF2.
Frame Relay SVCs Over ISDN
Frame Relay SVCs over ISDN is an existing feature of Cisco IOS software. To activate the Frame Relay SVCs over ISDN functionality, configure the SVCs under dialer interface or BRI interface, depending on where Frame Relay encapsulation is specified.
Caveats
Caveats describe unexpected behavior or defects in Cisco IOS software releases. Severity 1 caveats are the most serious caveats, severity 2 caveats are less serious, and severity 3 caveats are the least serious of these three severity levels.
Caveats in Release 12.2 T are also in Release 12.2(13)ZF2. For information on caveats in Cisco IOS Release 12.2 T, refer to the Caveats for Cisco IOS Release 12.2 T document. For information on caveats in Cisco IOS Release 12.2, refer to the Caveats for Cisco IOS Release 12.2 document. These documents list severity 1 and 2 caveats, and are located on Cisco.com and the Documentation CD.
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Resolved Caveats for Release 12.2(13)ZF2
Cisco IOS Release 12.2(13)ZF2 is a rebuild release for Cisco IOS Release 12.2(13)ZF. This section describes unexpected behavior that is fixed in Release 12.2(13)ZF2.
CSCdz71127
Cisco routers and switches running Cisco IOS software and configured to process Internet Protocol version 4 (IPv4) packets are vulnerable to a Denial of Service (DoS) attack. A rare sequence of crafted IPv4 packets sent directly to the device may cause the input interface to stop processing traffic once the input queue is full. No authentication is required to process the inbound packet. Processing of IPv4 packets is enabled by default. Devices running only IP version 6 (IPv6) are not affected. A workaround is available.
Cisco has made software available, free of charge, to correct the problem.
This advisory is available at
http://www.cisco.com/warp/public/707/cisco-sa-20030717-blocked.shtml
CSCea02355
Cisco routers and switches running Cisco IOS software and configured to process Internet Protocol version 4 (IPv4) packets are vulnerable to a Denial of Service (DoS) attack. A rare sequence of crafted IPv4 packets sent directly to the device may cause the input interface to stop processing traffic once the input queue is full. No authentication is required to process the inbound packet. Processing of IPv4 packets is enabled by default. Devices running only IP version 6 (IPv6) are not affected. A workaround is available.
Cisco has made software available, free of charge, to correct the problem.
This advisory is available at
http://www.cisco.com/warp/public/707/cisco-sa-20030717-blocked.shtml
Open Caveats for Release 12.2(13)ZF
The following sections lists the open caveats for the Cisco IOS release 12.2(13)ZF.
CSCea33219
The throughput of the tx-ring size 1 feature on the Cisco 1700 router XDSL interface decreases when the pack latency is reduced.
CSCdz79876
Frame Relay encapsulation fails on legacy dial-on-demand (DDR) configuration.
CSCdz90239
Maps bound to Frame Relay SVCs are not being cleared after disconnecting the call.
CSCea01223
The dialer subinterfaces SVC establishment.
CSCea04907
The router crashes when multiple SVCs on one point-to-point subif is attempted to set up.
CSCea14426
Call cannot be made after removing the dialer subinterface.
Resolved Caveats for Release 12.2(13)ZF
The following sections lists the resolved caveats for the Cisco IOS release 12.2(13)ZF.
CSCdz33676
DHCP secure ARP installation is not correct for no ip routing.
CSCdz36223
Tracebacks are seen when authorized arp command is enabled.
CSCdz38253
ARP timer does not work correctly for secure ARP entries.
CSCdz44824
Same IP address used by hacker can cause refreshing of secure ARP.
CSCdz44839
The static arp removal command does not bring back secure ARP entry.
CSCdz49146
Timer issue when the arp timeout is set to 60 min from the default 4 hr.
CSCdz52933
Configuring authorized arp allows dynamic ARP entries to be installed.
CSCdz59677
Timer expired notification is sent by ARP to DHCP when no arp auth is enabled.
CSCdz62280
Configuring arp auth removes the ARP entry if the age exceeds the ARP timeout.
Related Documentation
The following sections describe the documentation available for the Cisco 1700 series routers. Typically, these documents consist of hardware and software installation guides, Cisco IOS configuration and command references, 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 Cisco.com and the Documentation CD.
Use these release notes with the documents listed in the following sections:
Release-Specific Documents
The following documents are specific to Release 12.2 and apply to Release 12.2(13)ZF2. They are located on Cisco.com and the Documentation CD (under the heading Service & Support):
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Technical Documents: Cisco IOS Software: Release 12.2: Release Notes: Cisco IOS Release 12.2 T
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Technical Documents: Product Bulletins
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Technical Documents: Cisco IOS Software: Release 12.2: Caveats
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Platform-Specific Documents
Hardware installation guides, configuration and command reference guides, and additional documents specific to Cisco 1700 series routers are available on Cisco.com and the Documentation CD at the following location:
http://www.cisco.com/univercd/cc/td/doc/product/access/acs_mod/1700/index.htm
This URL is subject to change without notice. If it changes, point your web browser to Cisco.com, and click the following path:
Cisco Product Documentation: Access Servers and Access Routers: Modular Access Routers: Cisco 1700 Series Routers: <platform_name>
Obtaining Documentation
These sections explain how to obtain documentation from Cisco Systems.
World Wide Web
You can access the most current Cisco documentation on the World Wide Web at this URL:
Translated documentation is available at this URL:
http://www.cisco.com/public/countries_languages.shtml
Documentation CD-ROM
Cisco documentation and additional literature are available in a Cisco Documentation CD-ROM package, which is shipped with your product. The Documentation CD-ROM is updated monthly and may be more current than printed documentation. The CD-ROM package is available as a single unit or through an annual subscription.
Ordering Documentation
You can order Cisco documentation in these ways:
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http://www.cisco.com/cgi-bin/order/order_root.pl
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http://www.cisco.com/go/subscription
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Documentation Feedback
You can submit comments electronically on Cisco.com. In the Cisco Documentation home page, click the Fax or Email option in the "Leave Feedback" section at the bottom of the page.
You can e-mail your comments to bug-doc@cisco.com.
You can submit your comments by mail by using the response card behind the front cover of your document or by writing to the following address:
Cisco Systems
Attn: Document Resource Connection
170 West Tasman Drive
San Jose, CA 95134-9883We appreciate your comments.
Obtaining Technical Assistance
Cisco provides Cisco.com as a starting point for all technical assistance. Customers and partners can obtain online documentation, troubleshooting tips, and sample configurations from online tools by using the Cisco Technical Assistance Center (TAC) Web Site. Cisco.com registered users have complete access to the technical support resources on the Cisco TAC Web Site.
Cisco.com
Cisco.com is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information, networking solutions, services, programs, and resources at any time, from anywhere in the world.
Cisco.com is a highly integrated Internet application and a powerful, easy-to-use tool that provides a broad range of features and services to help you with these tasks:
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If you want to obtain customized information and service, you can self-register on Cisco.com. To access Cisco.com, go to this URL:
Technical Assistance Center
The Cisco Technical Assistance Center (TAC) is available to all customers who need technical assistance with a Cisco product, technology, or solution. Two levels of support are available: the Cisco TAC Web Site and the Cisco TAC Escalation Center.
Cisco TAC inquiries are categorized according to the urgency of the issue:
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The Cisco TAC resource that you choose is based on the priority of the problem and the conditions of service contracts, when applicable.
Cisco TAC Web Site
You can use the Cisco TAC Web Site to resolve P3 and P4 issues yourself, saving both cost and time. The site provides around-the-clock access to online tools, knowledge bases, and software. To access the Cisco TAC Web Site, go to this URL:
All customers, partners, and resellers who have a valid Cisco service contract have complete access to the technical support resources on the Cisco TAC Web Site. The Cisco TAC Web Site requires a Cisco.com login ID and password. If you have a valid service contract but do not have a login ID or password, go to this URL to register:
http://www.cisco.com/register/
If you are a Cisco.com registered user, and you cannot resolve your technical issues by using the Cisco TAC Web Site, you can open a case online by using the TAC Case Open tool at this URL:
http://www.cisco.com/tac/caseopen
If you have Internet access, we recommend that you open P3 and P4 cases through the Cisco TAC Web Site.
Cisco TAC Escalation Center
The Cisco TAC Escalation Center addresses priority level 1 or priority level 2 issues. These classifications are assigned when severe network degradation significantly impacts business operations. When you contact the TAC Escalation Center with a P1 or P2 problem, a Cisco TAC engineer automatically opens a case.
To obtain a directory of toll-free Cisco TAC telephone numbers for your country, go to this URL:
http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml
Before calling, please check with your network operations center to determine the level of Cisco support services to which your company is entitled: for example, SMARTnet, SMARTnet Onsite, or Network Supported Accounts (NSA). When you call the center, please have available your service agreement number and your product serial number.
This document is to be used in conjunction with the documents listed in the "Related Documentation" section.
Copyright © 2003, Cisco Systems, Inc.
All rights reserved.1 IP address 10.0.0.3 is the secure ARP entry for R2 in the DHCP server.2 IP address 10.0.0.3 is the DHCP obtained IP address from R1.
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