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Release Notes for Cisco Internet Streamer
CDS 2.4.3Obtaining Documentation and Submitting a Service Request
Release Notes for Cisco Internet Streamer
CDS 2.4.3
These release notes cover Cisco Internet Streamer CDS Release 2.4.3-b7.
Revised: August 2009,OL-20359-01Contents
The following information is included in these release notes:
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Obtaining Documentation and Submitting a Service Request
Enhancements
Table 1 describes the enhancements to Internet Streamer CDS 2.4.3.
Release 2.4.3 supports the CDE220 2G2 platform. See the "System Requirements" section for more information.
Note
Note
System Requirements
The Internet Streamer CDS runs on the CDE100, CDE200, CDE205, and the CDE220 hardware models. Table 2 lists the different device modes for the Cisco Internet Streamer CDS software, and which CDEs support them.
Table 2 Supported CDEs
CDSM
Yes
No
Yes
No
SR
No
Yes
Yes
Yes
SE
No
Yes
Yes
Yes
Release 2.4.3 supports the CDE220 2G2 platform. There are a total of ten gigabit Ethernet ports in this CDE. The first two ports (1/0 and 2/0) are management ports. The remaining eight gigabit Ethernet ports can be configured as one port channel. See the Cisco Content Delivery Engine CDE205/220/420 Hardware Installation Guide for set up and installation procedures for the CDE220 2G2.
The CDE100 can run as the CDSM, while theCDE200 can run as the Service Router or the Service Engine. See the Cisco Content Delivery Engine CDE100/200/300/400 Hardware Installation Guide for set up and installation procedures for the CDE100 and CDE200.
The CDE205 can run as the CDSM, Service Router, or Service Engine. See the Cisco Content Delivery Engine CDE205/220/420 Hardware Installation Guide for set up and installation procedures for the CDE205.
Note
Limitations and Restrictions
This release contains the following limitations and restrictions:
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Note
The CDS does support clients that are behind a NAT device or firewall that have shared external IP addresses. In other words, there could be a firewall between the CDS network and the client device. However, the NAT device or firewall must support RTP/RTSP.
Important Notes
To maximize the content delivery performance of a CDE200, CDE205, or CDE220, we recommend you do the following:
1.
Configure interfaces on the quad-port gigabit Ethernet cards into a single port-bonding interface. Use this bonding channel, which provides instantaneous failover between ports, for all client-facing traffic. Use interfaces number 1 and 2 (the two on-board Ethernet ports) for intra-CDS traffic, such as management traffic, and configure these two interfaces either as standby or port-channel mode. Refer to the Cisco Internet Streamer CDS 2.4 Software Configuration Guide for detailed instruction.
2.
Assuming ether-channel (also known as port-channel) is used between the upstream router/switch and the SE for streaming real-time data, the ether-channel load balance algorithms on the upstream switch/router and the SE should be configured as "Src-ip" and "Destination IP" respectively. Using this configuration ensures session stickiness and general balanced load distribution based on clients' IP addresses. Also, distribute your client IP address space across multiple subnets so that the load balancing algorithm is effective in spreading the traffic among multiple ports.
Note
3.
The CDE200, CDE205, or CDE220 performance has been optimized for HTTP and WMT bulk traffic, individually. While it is entirely workable to have mixed HTTP and WMT traffic flowing through a single CDE200 simultaneously, the aggregate performance may not be as optimal as the case where the two traffic types are separate, especially when the traffic volume is high. So, if you have enough client WMT traffic to saturate a full CDE200, CDE205, or CDE220 capacity, we recommend that you provision a dedicated CDE200 to handle WMT; and likewise for HTTP. In such cases, we do not recommended that you mix the two traffic types on all CDE servers which could result in suboptimal aggregate performance and require more CDE200, CDE205, or CDE220 servers than usual.
4.
If your deployment must have Streamers handle HTTP and WMT traffic simultaneously, it is best that you configure the Streamer to limit each of its HTTP sessions below a certain bitrate (for example, 1Mbps, 5Mbps, or the typical speed of your client population). This prevents HTTP sessions from running at higher throughput than necessary, and disrupting the concurrent WMT streaming sessions on that Streamer. To turn on this pacing feature, use the HTTP bitrate field in the CDSM Delivery Service GUI page.
Please be aware of the side effects of using the following commands for Movie Streamer:
Config# movie-streamer advanced client idle-timeout <30-1800>Config# movie-streamer advanced client rtp-timeout <30-1800>These commands are only intended for performance testing when using certain testing tools that do not have full support of the RTCP receiver report. Setting these timeouts to high values causes inefficient tear down of client connections when the streaming sessions have ended.
For typical deployments, it is preferable to leave these parameters set to their defaults.
5.
Open Caveats
This release contains the following open caveats:
Windows Media Streaming
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Symptom:
Windows Media Streaming core dumps during longevity testing.
Conditions:
When multiple bit-rates, live, VOD, and protocols are used and a server-side playlist (SSPL) is used as the live source.
Workaround:
None.
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Symptom:
Some of the Windows Media files are partially cached during stress testing of cache misses for unique content.
Conditions:
When Windows Media Streaming Fast Cache is disabled.
Workaround:
Enable Fast Cache on the Devices > Application Control > Windows Media Streaming > General Settings page.
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Symptom:
Windows Media Streaming core dumps during testing of live streaming.
Conditions:
This happens when a server-side playlist (SSPL) source is used and automation scripts are used as clients.
Workaround:
None.
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Symptom:
Multiple stale outgoing sessions are displayed for the show statistics wmt streamstat command.
Conditions:
When an SSPL broadcast publishing point is stopped and a managed live Windows Media Streaming program is scheduled.
Workaround:
Stale sessions are removed periodically and do not impact streaming. Alternatively, you can enable the SSPL broadcast publishing point source.
Flash Media Streaming
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Symptom:
The FMS core process generates a core dump file.
Conditions:
The core dump occurs once in awhile during high-stress scenarios (that is, when the CPU and disk thresholds are reached). The high-stressed scenario is coupled with both cache-hit and cache-miss traffic for MPEG-4 VOD Flash Media Streaming.
Workaround:
Set the disk and CPU thresholds to 80 percent, so that the system will not get overloaded (SR will not redirect any requests when threshold is reached) (Default is 80 percent).
(config)# service-router service-monitor threshold cpu 80(config)# service-router service-monitor threshold disk 80Set all debug level to default.
# no debug all set logging level to notice# sh loggingSyslog to host is disabled.Syslog to console is disabledPriority for console logging is set to: noticeSyslog to disk is enabledPriority for disk logging is set to: noticeFilename for disk logging is set to: /local1/syslog.txtSyslog facility is set to *Syslog disk file recycle size is set to 100000000•
Symptom:
Flash Media Streaming edge server process keeps printing syslog message on console during SR RTMP performance test.
Condition:
Performance test conditions.
Workaround:
This syslog message occurs some times when Flash Media Server is not able to shutdown properly. This is not harmful message and only occurs during the fms disable command.
CDSM
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Symptom:
The transaction log configuration from device group cannot apply to the SE in this special case.
Condition:
If configure any value from CLI and negative it, a CLI with default value will still show in running config.
Workaround:
Configuring just works, please avoid to negative the configure before it is fixed.
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Symptom:
When an SE is reloading, the Flash Media Streaming Wholesale License page in the CDSM does not respond, the page is blank for several seconds, and a warning dialog box displays, "The creation/modification will not proceed."
Workaround:
None. The issue does not impact the functionality of the CDSM. All pages except the Wholesale License page, are responsive.
None. The CDSM recovers after about five minutes.
Platform
•
Symptom:
The link state of a switch port is always "up" when connected to a gigabit Ethernet over optical fiber interface on the SE. Depending on how the port channel and load-balancing are configured, this may cause the switch to send packets to a shut down interface on the SE.
Conditions:
When the shutdown command is manually entered on a gigabit Ethernet over optical fiber interface
Workaround:
Manually shut down the corresponding interface on the switch.
•
Symptom:
Changing the time zone to "daylight savings" (or "summer time") does not take affect.
Condition:
Although the Internet Streamer CDS supports time-zone adjustments, changes to "daylight savings" (or "summer time") do not occur "on-the-fly."
Workaround:
To have the time-zone change for "daylight savings" (or "summer time") take affect, reload the server.
Acquisition and Distribution
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Symptom:
CDNFS usage shows used storage on a Service Engine that has been unassigned from all delivery services.
Condition:
Content not removed from Service Engine that has been unassigned from all delivery services.
Workaround:
Use the cdnfs cleanup start command to remove the content that remained after unassigning the SE from all delivery services.
URL Signing
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Symptom:
RTSPD core dumps when url validation is done using private key signing when URL is signed using public key
Condition:
RTSPD core dump happens and requests are not served.
Workaround:
Validate the URL using the same method used when generating the signature.
Service Router
•
Symptom:
Service router failed to redirect client request .
Condition:
When curl is used as the browser.
Workaround:
Use wget instead of curl. .
Resolved Caveats
The following caveats have been resolved since Cisco Internet Streamer CDS Release 2.4.1 Not all the resolved issues are mentioned here. The following list highlights the resolved caveats associated with customer deployment scenarios.
Flash Media Streaming
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Symptom:
If the maximum bandwidth for Flash Media Streaming is reduced, Flash Media Streaming does not honor the configuration for first two minutes after the configuration change.
Web Engine
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Symptom:
Web Engine replies with wrong cache-status for Flash Media Streaming request in corner case.
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Symptom:
Query string in multicast reference URL fails.
CDSM
•
Symptom:
Inconsistency between default values in CLI and CDSM for port channel configuration.
•
Symptom:
Some SNMP settings are not compatible between Release 2.3 and Release 2.4.
Authorization Server
•
Symptom:
SE returning "403 Forbidden" for dynamically cached content.
Upgrading to Release 2.4.3
The only supported upgrade paths are Release 2.4.1 to Release 2.4.3 and Release 2.3.x to Release 2.4.3. If you are running a release prior to Release 2.3.x, you must upgrade to Release 2.3.x before upgrading to Release 2.4.3.
Note
1.
2.
3.
4.
5.
6.
7.
URL Public Key Signing
Table 3 describes the compatibility and results when using a prior CDS software release to perform URL signing and the current software release to perform URL validation.
Documentation Updates
The following documents have been updated for this release:
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The following documents have been added for this release:
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The following documents have no changes:
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Related Documentation
Refer to the following documents for additional information about the Cisco Internet Streamer CDS 2.4:
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http://www.cisco.com/en/US/docs/video/cds/cda/is/2_4/configuration_guide/is_cds24-cfguide.html
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http://www.cisco.com/en/US/docs/video/cds/cda/is/2_4/quick_guide/ISCDSQuickStart.html
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http://www.cisco.com/en/US/docs/video/cds/cda/is/2_4/developer_guide/is_cds_24_apiguide.html
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http://www.cisco.com/en/US/docs/video/cds/cda/is/2_4/command_ref/Command_Ref.html
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http://www.cisco.com/en/US/docs/video/cds/cda/is/2_4/message_guide/Messages.html
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http://www.cisco.com/en/US/docs/video/cds/overview/CDS_Roadmap.html
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http://www.cisco.com/en/US/docs/video/cds/cde/installation/guide/CDE_Install_Book.html
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http://www.cisco.com/en/US/docs/video/cds/cde/regulatory/compliance/CDE_RCSI.html
The entire CDS software documentation suite is available on Cisco.com at:
http://www.cisco.com/en/US/products/ps7127/tsd_products_support_series_home.html
The entire CDS hardware documentation suite is available on Cisco.com at:
http://www.cisco.com/en/US/products/ps7126/tsd_products_support_series_home.html
Obtaining Documentation and Submitting a Service Request
For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:
http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html
Subscribe to the What's New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0.
This document is to be used in conjunction with the documents listed in the "Related Documentation" section.
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