Chapters in a configuration guide describe protocols, configuration tasks, and Cisco IOS software functionality, and contain comprehensive configuration examples. Chapters in a command reference provide complete command syntax information. Use each configuration guide with its corresponding command reference. These electronic documents may contain updates and modifications made after the hard-copy documents were printed. The following sections provide sources for obtaining documentation from Cisco Systems.
Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. If you are reading Cisco products 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. For your convenience, many documents contain a response card behind the front cover for submitting your comments by mail.
Otherwise, you can mail your comments to the following address:. Cisco Systems, Inc. The following sections provide sources for obtaining technical assistance from Cisco Systems. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco.
Through Cisco. In addition, you can resolve technical issues with online technical support, 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 Cisco. Registered users can order products, check on the status of an order, access technical support, and view benefits specific to their relationships with Cisco. The Cisco TAC website is available to all customers who need technical assistance with a Cisco product or technology that is under warranty or covered by a maintenance contract. Network functionality is noticeably impaired, but most business operations continue.
In each of the above cases, use the Cisco TAC website to quickly find answers to your questions. If you have a priority level 1 P1 or priority level 2 P2 problem, contact TAC by telephone and immediately open a case.
To obtain a directory of toll-free numbers for your country, go to the following website:. No workaround is available. IOS tm c Software cy-mz , Release Caution Cisco IOS images with strong encryption including, but not limited to bit 3DES data encryption feature sets are subject to United States government export controls and have limited distribution. Strong encryption images to be installed outside the United States are likely to require an export license.
Each module in the Cisco IOS documentation set consists of one or more configuration guides and one or more corresponding command references. Chapters in a configuration guide describe protocols, configuration tasks, and Cisco IOS software functionality, and contain comprehensive configuration examples.
Chapters in a command reference provide complete command syntax information. Use each configuration guide with its corresponding command reference. These electronic documents may contain updates and modifications made after the hard-copy documents were printed. The following sections provide sources for obtaining documentation from Cisco Systems. Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product.
If you are reading Cisco products 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. For your convenience, many documents contain a response card behind the front cover for submitting your comments by mail. Otherwise, you can mail your comments to the following address:.
Cisco Systems, Inc. The following sections provide sources for obtaining technical assistance from Cisco Systems. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco. Through Cisco. In addition, you can resolve technical issues with online technical support, 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 Cisco. Registered users can order products, check on the status of an order, access technical support, and view benefits specific to their relationships with Cisco. The Cisco TAC website is available to all customers who need technical assistance with a Cisco product or technology that is under warranty or covered by a maintenance contract.
Network functionality is noticeably impaired, but most business operations continue. In each of the above cases, use the Cisco TAC website to quickly find answers to your questions. If you have a priority level 1 P1 or priority level 2 P2 problem, contact TAC by telephone and immediately open a case. To obtain a directory of toll-free numbers for your country, go to the following website:.
No workaround is available. IOS tm c Software cy-mz , Version Caution Cisco IOS images with strong encryption including, but not limited to bit 3DES data encryption feature sets are subject to United States government export controls and have limited distribution. Strong encryption images to be installed outside the United States are likely to require an export license.
This type of signaling is sometimes called Robbed Bit signaling RBS because a bit is taken out or robbed from the user data stream to provide signaling information to and from the switch. The R2 signaling is an international signaling standard that is common to channelized E1 networks. There is no single standard for R2 signaling. Cisco and Cisco routers use E1 R2 signaling to communicate with central office trunks that also use E1 R2 signaling. When packets are encapsulated by tunnel or encryption headers, Quality of Service QoS features are unable to examine the original packet headers and correctly classify the packets.
Packets traveling across the same tunnel have the same tunnel headers, so the packets are treated identically if the physical interface is congested.
With the growing popularity of Virtual Private Networks VPNs , the need to classify traffic within a traffic tunnel is gaining importance. QoS features have historically been unable to classify traffic within a tunnel. The process of classifying features before tunneling and encryption is called preclassification. When the new feature is enabled, the QoS features on the output interface classify packets before encryption, allowing traffic flows to be adjusted in congested environments.
The end result is more effective packet tunneling. Cisco IOS software can classify packets and apply the appropriate QoS service before the data is encrypted and tunneled.
In addition, when packets are marked using the IP Type of Service byte or differentiated services code point DSCP values, the markings are copied to the new, encrypted packet.
This allows the service provider to treat mission critical or multi-service traffic with higher priority across their network. These URLs are subject to change without notice.
If it changes, point your web browser to CCO, and click the following path:. The following restrictions in Release Also, see the "Caveats" section.
You can change this configuration if needed. Cisco and V router fans are always on and Cisco routers do not contain a fan. However, the fans in Cisco , , , and routers stay off until thermally activated.
When using a multipartition flash card, the various flash partitions are referred to as "flash", "flash", etc. If you specify only "flash" in a multipartition flash, the parser assumes "flash To see information for all flash partitions, enter show flash? This will list all of the valid partitions. Then enter show flash:xx: all on each valid partition.
Other rates are treated as the next lower value of a multiple of For example, an entered PCR value of is considered Booting a Cisco series router with the commands boot flash or boot system flash results in unpredictable behavior. To work around this problem, be sure to enter a colon : following both commands for example, boot flash: or boot system flash:. Booting a Cisco series router using the command boot system tftp might not work due to insufficient memory.
To work around this problem, use the command tftpdnld from the ROM monitor. This error is caveat number CSCdv 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 describe unexpected behavior or defects in the 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. These documents list severity 1 and 2 caveats; the documents are located on Cisco. Note If you have an account with Cisco. To reach the Bug Toolkit, log in to Cisco.
This could happen if an immediate digit forwarding scheme is used, for example if no digit-strip command is configured on the dial peer.
Configuration error history is seen in the show ccm-manager command output after the configuration is downloaded. However, the functionality of the gateways are not affected. The BGP protocol is not enabled by default, and must be configured in order to accept traffic from an explicitly defined peer.
Unless the malicious traffic appears to be sourced from a configured, trusted peer, it would be difficult to inject a malformed packet. BGP MD5 is a valid workaround for this problem. Cisco has made free software available to address this problem. The following sections describe the documentation available for the Cisco 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.
The following documents are specific to Release They are located on Cisco. Hardware installation guides, configuration and command reference guides, and additional documents specific to the Cisco series routers are available on Cisco.
Cisco documentation and additional literature are available in a Cisco Documentation CD-ROM package, which is shipped with your product. You can submit comments electronically on Cisco.
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 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 provides Cisco. 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.
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