The workaround is to reduce the number of multicast routes and IGMP snooping groups to less than the maximum supported value. It is not applied to packets that are forwarded through software. Hence, with multicast routing enabled, the first few packets are sent from a port even when IGMP filtering is set to deny those groups on that port.
The switchport block multicast interface configuration command is only applicable to non-IP multicast traffic. The workaround is to enter clear ip mroute privileged EXEC command on the interface. The ratio of buffer size to threshold level should be greater than 10 to avoid disabling the queue. The workaround is to choose compatible buffer sizes and threshold levels. Instead, the switch uses shaped round robin SRR as the queuing mechanism.
The auto-QoS feature is designed on each platform based on the feature set and hardware limitations, and the queuing mechanism supported on each platform might be different. Valid However, you cannot create and manage switch clusters through the device manager. For information about Network Assistant, see the 'New Features' section. The workaround is to click Yes when you are prompted to accept the certificate. These sections describe the important notes related to this software release for the Catalyst switches:.
By default, the HTTP server is enabled on the switch. You should write down the port number through which you are connected. Use care when changing the switch IP information. If you are not using the default method of authentication the enable password , you need to configure the HTTP server interface with the method of authentication used on the switch. Otherwise, you cannot launch the device manager. Cisco IOS may permit arbitrary code execution after exploitation of a heap-based buffer overflow vulnerability.
Cisco has included additional integrity checks in its software, as further described below, that are intended to reduce the likelihood of arbitrary code execution. Cisco has made free software available that includes the additional integrity checks for affected customers.
These documents provide complete information about the Catalyst switches and are available at Cisco. Cisco documentation and additional literature are available on Cisco. Cisco also provides several ways to obtain technical assistance and other technical resources. These sections explain how to obtain technical information from Cisco Systems.
Cisco documentation and additional literature are available in the Product Documentation DVD package, which may have shipped with your product. The Product Documentation DVD is updated regularly and may be more current than printed documentation. The Product Documentation DVD is a comprehensive library of technical product documentation on portable media.
The DVD enables you to access multiple versions of hardware and software installation, configuration, and command guides for Cisco products and to view technical documentation in HTML. With the DVD, you have access to the same documentation that is found on the Cisco website without being connected to the Internet. Certain products also have. Registered Cisco. Beginning June 30, , registered Cisco. Nonregistered Cisco. You can also order documentation by e-mail at [email protected] or by fax at 1 in the United States and Canada, or elsewhere at You can rate and provide feedback about Cisco technical documents by completing the online feedback form that appears with the technical documents on Cisco.
You can send comments about Cisco documentation to [email protected]. You can submit comments by using the response card if present behind the front cover of your document or by writing to the following address:. Cisco is committed to delivering secure products. We test our products internally before we release them, and we strive to correct all vulnerabilities quickly. An emergency is either a condition in which a system is under active attack or a condition for which a severe and urgent security vulnerability should be reported.
All other conditions are considered nonemergencies. Never use a revoked or an expired encryption key. Cisco Technical Support provides hour-a-day award-winning technical assistance. If you do not have a valid Cisco service contract, contact your reseller. The website is available 24 hours a day, at this URL:. If you have a valid service contract but do not have a user ID or password, you can register at this URL:.
Note Use the Cisco Product Identification CPI tool to locate your product serial number before submitting a web or phone request for service. Note: Some of the above-mentioned links may not work because it might be possible that their URLs are changed or the IOS images are removed from the hosting server.
Take a quick look at the following step by step GNS3 tutorials and start to learn from the beginning to advance GNS3 configurations. Please drop your queries in the comment box, if you face any issues. You may also provide your suggestions to improve the article. We would love to hear your valuable feedback too. Please like and share the article, it will not cost you anything. IOS 15 Mainline This router series is. These have been tested with latest GNS3. Feel free to drop comments.
If you face any problem setting it up with GNS3 drop me a message and I will get back to you asap. GNS3 is an open source GNU GPL software that simulates complex networks while being as close as possible from the way real networks perform, all of this without having dedicated network hardware such as routers and switches.
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