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Table Of Contents
Release Notes for Cisco Gigabit-Ethernet Optimized Video Networking Solution for Cable, Release 3.0
Cisco Hardware Components and Software
Cisco Product Security Overview
Reporting Security Problems in Cisco Products
Obtaining Technical Assistance
Cisco Technical Support & Documentation Website
Definitions of Service Request Severity
Obtaining Additional Publications and Information
Release Notes for Cisco Gigabit-Ethernet Optimized Video Networking Solution for Cable, Release 3.0
February 6, 2006
These release notes include the following topics:
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Caveats
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Tip
Document History
Solution Description
The Cisco Gibabit-Ethernet Optimized Video Networking Solution for Cable, Release 3.0, supports major enhancements to established video networking architectures, particularly in the areas of IP multicast (IPmc) distribution for digital broadcast video services. This release includes the addition of architectural components to support resilient IPmc forwarding over existing IP transport networks, specifically, between encoders/multiplexers and ad splicers/groomers, as well as between ad splicers (in conjunction with a video groomer function) and edge QAM devices.
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Figure 1 illustrates the reference architecture, a subset of a large network architecture as may be developed and maintained by a multiple services operator (MSO).
Figure 1 Reference Architecture
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The solution focuses on the IP multicast (IPmc) distribution of digital simulcast (DS) and digital broadcast (DB) flows over the RAN. The solution is based on egress-replication mode for IPmc.
A single market network is depicted above. Each market network includes two access routers (ARs) in the HE, with hub routers (HRs) in the hubs. Two source routers (SRs) (not shown) aggregate services that originate in the HE.
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Multiple converged regional area networks (RANs) are connected to the Internet through peering points provided by an Internet service provider. RANs can be interconnected to each other, as well as to a national HE, through a QoS-enabled backbone.
A backbone can be used to interconnect RANs as well as other MSOs. The backbone makes it possible for the MSO to migrate off the satellite links and onto terrestrial network for transport stream distribution.
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Two DS domains:
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One DB domain—from the regional HE to the EQAM devices
Because the regional HEs are dispersed throughout the RAN/market networks, and broadcast streams from each headend are forwarded across those networks, QoS is important to the delivery of the broadcast service.
Bidirectional 10-GE links are used for broadcast video, high-speed data (HSD), and VoIP services. These interconnects may consist of several 10-GE links bonded together by means of static portchannels or Layer 3 equal-cost multipath (ECMP) load balancing.
Separate links and routing protocols are used for VoD and broadcast services. Specifically, VoD uses dedicated 10-GE interfaces that are configured with static routing.
Solution Components
The Cisco Gibabit-Ethernet Optimized Video Networking Solution for Cable features both Cisco and third-party components. Cisco components tested, as well as third-party components used in testing, are listed in the following sections:
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Cisco Hardware Components and Software
The Cisco Gibabit-Ethernet Optimized Video Networking Solution for Cable, Release 3.0, consists of core Cisco components that are tested, documented, and fully supported by Cisco in the context of the solution. Table 1 lists the Cisco hardware components that were tested, including the Cisco IOS Release and hardware version.
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1 See Note below.
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How to Use the Cisco Upgrade Planner
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Step 1
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b.
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Caution
Step 8
Step 9
Third-Party Equipment
Third-party equipment is included to test the functionality of the Cisco routers/switches used in the solution. Table 2 lists the third-party hardware and software components that were tested.
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For the most current information, contact your Cisco account representative, visit the manufacturer's website, or contact the manufacturer's representative.
Caveats
This section lists the key caveats for the components in this solution. Workarounds are provided where applicable.
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If you have an account with Cisco.com, you can use the Bug Toolkit to find to find caveats of any severity for any release. To find the open caveats for Cisco components used in this solution, you must query the system for each of the component and software releases used or being planned for your network. To reach the Bug Toolkit, go to http://www.cisco.com/cgi-bin/Support/Bugtool/launch_bugtool.pl.
Open Caveats—Release 3.0
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On occasion, when an interface goes into a shutdown state on a Cisco 7600 series router, duplicate multicast packets may be sent out on other interfaces.
Workaround: There is no workaround.
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When a XENPAK with one fiber for unidirectional flows is removed, the interface state remains up.
Workaround: There is no workaround.
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When traffic is sent across a port channel of a Cisco 7600 series router and the show interface port-channel command is issued, the TX and RX load counters for the interface show as permanently set to 0.
Workaround: Look further into the results of the show interface port-channel command and use the bits/sec or packets/sec output to calculate the line rate:
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On occasion, shutting an interface can cause a Cisco 7600 series router to produce continuous tracebacks.
Workaround: Reload the router.
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On occasion, an accounting record may be dropped because of a low memory error (%AAAA-3-DROPACCTLOWMEM) generated during multiple user loads.
Ten users were simultaneously performing actions on the router. The memory usage observed following a show process memory command shows plenty of memory available.
Workaround: There is no workaround.
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An SNMP walk on a Cisco 7600 series router never fully executes.
It hangs because OIDs seem to be out of order when hitting SNMPv2-SMI::mib-2.47.1.3.3.1.1.20.27 = INTEGER: 27 before SNMPv2-SMI::mib-2.47.1.3.3.1.1.20.23 = INTEGER: 23.
Workaround: There is no workaround.
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On occasion, on a Cisco 7600 series router, SNMP stops responding following a reload.
Multiple reloads cause SNMP to stop responding, and generate a traceback.
Workaround: Reload the router again.
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On a Cisco 7600 series router, multicast replication mode configured as ingress changes to egress following a reload of the router.
Workaround: Remove the no mls ip multicast replication-mode ingress command, then add the mls ip multicast replication-mode ingress command.
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When a fiber GBIC is inserted and a copper GBIC replaces it, the speed nonegotiate command does not apply to the copper GBIC and prevents the link from coming up. The command remains in the configuration.
Workaround: Remove the speed nonegotiate command.
Related Documentation
Solution Documentation
This document, and the Cisco Gigabit-Ethernet Optimized Video Networking Solution for Cable Design and Implementation Guide, Release 3.0, are available under the following URL:
http://www.cisco.com/univercd/cc/td/doc/solution/vodsols/index.htm
Cisco 7600 Series Routers
Documentation resources for Cisco 7600 series routers are available at the following URL:
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http://www.cisco.com/univercd/cc/td/doc/product/core/cis7600/index.htm
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http://www.cisco.com/univercd/cc/td/doc/product/core/cis7600/software/122sx/index.htm
Cisco Catalyst 6500 Series Switches
Documentation resources for the Cisco 6500 series switches are available at the following URL:
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http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/index.htm
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http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/122sx/index.htm
Obtaining Documentation
Cisco documentation and additional literature are available on Cisco.com. 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.com
You can access the most current Cisco documentation at this URL:
http://www.cisco.com/techsupport
You can access the Cisco website at this URL:
You can access international Cisco websites at this URL:
http://www.cisco.com/public/countries_languages.shtml
Product Documentation DVD
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 .pdf versions of the documentation available.
The Product Documentation DVD is available as a single unit or as a subscription. Registered Cisco.com users (Cisco direct customers) can order a Product Documentation DVD (product number DOC-DOCDVD=) from the Ordering tool or Cisco Marketplace.
Cisco Ordering tool:
http://www.cisco.com/en/US/partner/ordering/
Cisco Marketplace:
http://www.cisco.com/go/marketplace/
Ordering Documentation
Beginning June 30, 2005, registered Cisco.com users may order Cisco documentation at the Product Documentation Store in the Cisco Marketplace at this URL:
http://www.cisco.com/go/marketplace/
Cisco will continue to support documentation orders using the Ordering tool:
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http://www.cisco.com/en/US/partner/ordering/
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http://www.cisco.com/univercd/cc/td/doc/es_inpck/pdi.htm
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Documentation Feedback
You can rate and provide feedback about Cisco technical documents by completing the online feedback form that appears with the technical documents on Cisco.com.
You can send comments about Cisco documentation to bug-doc@cisco.com.
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 Systems
Attn: Customer Document Ordering
170 West Tasman Drive
San Jose, CA 95134-9883We appreciate your comments.
Cisco Product Security Overview
Cisco provides a free online Security Vulnerability Policy portal at this URL:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html
From this site, you can perform these tasks:
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A current list of security advisories and notices for Cisco products is available at this URL:
If you prefer to see advisories and notices as they are updated in real time, you can access a Product Security Incident Response Team Really Simple Syndication (PSIRT RSS) feed from this URL:
http://www.cisco.com/en/US/products/products_psirt_rss_feed.html
Reporting Security Problems in Cisco Products
Cisco is committed to delivering secure products. We test our products internally before we release them, and we strive to correct all vulnerabilities quickly. If you think that you might have identified a vulnerability in a Cisco product, contact PSIRT:
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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.
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In an emergency, you can also reach PSIRT by telephone:
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Tip
Never use a revoked or an expired encryption key. The correct public key to use in your correspondence with PSIRT is the one linked in the Contact Summary section of the Security Vulnerability Policy page at this URL:
http://www.cisco.com/en/US/products/products_security_vulnerability_policy.htm
The link on this page has the current PGP key ID in use.
Obtaining Technical Assistance
Cisco Technical Support provides 24-hour-a-day award-winning technical assistance. The Cisco Technical Support & Documentation website on Cisco.com features extensive online support resources. In addition, if you have a valid Cisco service contract, Cisco Technical Assistance Center (TAC) engineers provide telephone support. If you do not have a valid Cisco service contract, contact your reseller.
Cisco Technical Support & Documentation Website
The Cisco Technical Support & Documentation website provides online documents and tools for troubleshooting and resolving technical issues with Cisco products and technologies. The website is available 24 hours a day, at this URL:
http://www.cisco.com/techsupport
Access to all tools on the Cisco Technical Support & Documentation website requires a Cisco.com user ID and password. If you have a valid service contract but do not have a user ID or password, you can register at this URL:
http://tools.cisco.com/RPF/register/register.do
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Submitting a Service Request
Using the online TAC Service Request Tool is the fastest way to open S3 and S4 service requests. (S3 and S4 service requests are those in which your network is minimally impaired or for which you require product information.) After you describe your situation, the TAC Service Request Tool provides recommended solutions. If your issue is not resolved using the recommended resources, your service request is assigned to a Cisco engineer. The TAC Service Request Tool is located at this URL:
http://www.cisco.com/techsupport/servicerequest
For S1 or S2 service requests or if you do not have Internet access, contact the Cisco TAC by telephone. (S1 or S2 service requests are those in which your production network is down or severely degraded.) Cisco engineers are assigned immediately to S1 and S2 service requests to help keep your business operations running smoothly.
To open a service request by telephone, use one of the following numbers:
Asia-Pacific: +61 2 8446 7411 (Australia: 1 800 805 227)
EMEA: +32 2 704 55 55
USA: 1 800 553-2447For a complete list of Cisco TAC contacts, go to this URL:
http://www.cisco.com/techsupport/contacts
Definitions of Service Request Severity
To ensure that all service requests are reported in a standard format, Cisco has established severity definitions.
Severity 1 (S1)—Your network is "down," or there is a critical impact to your business operations. You and Cisco will commit all necessary resources around the clock to resolve the situation.
Severity 2 (S2)—Operation of an existing network is severely degraded, or significant aspects of your business operation are negatively affected by inadequate performance of Cisco products. You and Cisco will commit full-time resources during normal business hours to resolve the situation.
Severity 3 (S3)—Operational performance of your network is impaired, but most business operations remain functional. You and Cisco will commit resources during normal business hours to restore service to satisfactory levels.
Severity 4 (S4)—You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations.
Obtaining Additional Publications and Information
Information about Cisco products, technologies, and network solutions is available from various online and printed sources.
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http://www.cisco.com/go/marketplace/
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http://www.cisco.com/go/iqmagazine
or view the digital edition at this URL:
http://ciscoiq.texterity.com/ciscoiq/sample/
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http://www.cisco.com/en/US/products/index.html
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http://www.cisco.com/discuss/networking
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http://www.cisco.com/en/US/learning/index.html
This document is to be used in conjunction with the documents listed in Related Documentation.
© 2006 Cisco Systems, Inc. All rights reserved.
Posted: Thu Mar 23 12:21:00 PST 2006
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