Table Of Contents
Release Notes for Cisco 800SRST Series Routers with Cisco IOS Release 12.4(20)YA
First Released: April 7, 2009Last Revised: April 6, 2009Cisco IOS Release 12.4(20)YA3OL-19221-01 First Release
These release notes describe new features and significant software components for the Cisco 800SRST series routers that support the Cisco IOS Release 12.4(20)YA releases. These release notes are updated as needed. Use these release notes with the Cross-Platform Release Notes for Cisco IOS Release 12.4T and About Cisco IOS Release Notes.
For a list of the software caveats that apply to the Release 12.4(20)YA releases, see the "Caveats" section. See also Caveats for Cisco IOS Release 12.4T. The online caveats document is updated for every maintenance release.
This section describes the system requirements for Release 12.4(20)YA and includes the following sections:
Table 1 lists the memory requirements for the Cisco IOS feature sets supported by Cisco IOS
Release 12.4(20)YA on the Cisco 800SRST series routers.
Table 1 Memory Requirements for the Cisco 800 Series Routers
Platform Image Name Image Flash (MB) DRAM (MB)
Cisco 881SRST, Cisco 886SRST, Cisco 887SRST, Cisco 888SRST
Cisco 880 Series IOS Universal Voice
Cisco IOS Release12.4(20)YA supports the following Cisco 800 series routers:
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 800SRST series routers, which are available at:
Determining the Software Version
To determine the version of Cisco IOS software currently running on your Cisco 800SRST series router, see About Cisco IOS Release Notes located at
Upgrading to a New Software Release
For general information about upgrading to a new software release, see About Cisco IOS Release Notes located at
Feature Set Tables
For information about Feature Set Tables, see About Cisco IOS Release Notes located at
New and Changed Information
This section contains the following information:
New Hardware Features in Cisco IOS Release 12.4(20)YA3
There are no new hardware features in this release.
New Software Features in Cisco IOS Release 12.4(20)YA3
There are no new software features in this release.
New Features in Release 12.4T
For information regarding the features supported in Cisco IOS Release 12.4T, see the Release Notes and Feature Guides links at:
For general information on caveats and the bug toolkit, see About Cisco IOS Release Notes located at
This section contains the following caveat information:
Open Caveats - Cisco IOS Release 12.4(20)YA3
There are no open caveats in this release.
Resolved Caveats - Cisco IOS Release 12.4(20)YA3
Symptom Cisco 3845 experiences trackback error:
Aug 14 12:34:55.960: %SYS-2-BADSHARE: Bad refcount in datagram_done, ptr=7006C010, count=0, -Traceback= 0x61816650 0x60641BD0 0x60C27A80 Aug 17 16:51:45.739: %SYS-2-BADSHARE: Bad refcount in datagram_done, ptr=705985A4, count=0, -Traceback= 0x61816650 0x60641BD0 0x60C27A80
Conditions The error message occurs on a router running the c3845-adventerprisek9_ivs_li-mz.124-15.T5 image.
Symptom VG224 endpoint does not connect to callback destination, once the callback destination is idle.
Conditions Multi node cluster and VG224 endpoint is registered with node other then the first node in the cluster.
Workaround Have VG224 endpoints registered with first node.
Further Problem Description: The activation of the callback is successful. What fails is when the callback destination becomes idle again and the VG224 endpoint gets notified (ring). After the VG224 endpoint goes offhook, the system should automatically connect to the Callback destination.This does not happen and VG224 endpoint gets silence.
Use this release note with the documents and websites in this release note and the documents listed in the following sections:
The following documents are specific to Release 12.4 and apply to Release 12.4(15)XZ:
Hardware installation guides, configuration and command reference guides, and additional documents specific to the Cisco 800SRST series routers are available at:
Cisco IOS Software Documentation Set
The Cisco IOS software documentation set consists of the Cisco IOS configuration guides, Cisco IOS command references, and several other supporting documents.
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.Cisco IOS Software Documentation is available in html or pdf form.
Select your release and click the command references, configuration guides, or any other Cisco IOS documentation you need.
See the "Notices" section in About Cisco IOS Release Notes located at:
Use this document in conjunction with the documents listed in the "Additional References" section.
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