Table Of Contents
Release Notes for the Cisco Global Site Selector, Release 4.1.2
Note The most current Cisco documentation for released products is available on Cisco.com. For the complete set of Cisco Global Site Selector user documentation, go to the following URL:
These release notes apply to Cisco Global Site Selector (GSS) software Version 4.1.2.
This section includes the following topics:
Upgrading or Downgrading the GSS Software
Table 1 provides information about the upgrade sequence for previous software versions that you must follow before you upgrade to Version 4.1.2.
Note To access the graphical user interface (GUI) after upgrading the GSS device from software version 3.2(0) to software version 4.1(0), clear the cache and then go to the URL and press Enter. This process is due to the change in the GUI look and feel.
Note The GSS software release 4.1(x) is supported only on GSS 4492R and is not supported on the following hardware: GSS 4491, GSS 4490, or GSS 4480.
Note You must upgrade the primary GSSM first, followed by the other GSS devices in your network. After you upgrade the primary GSSM, ensure that each GSS device in your network to be upgraded is connected to the primary GSS device. If you upgrade the non primary GSS prior to the primary GSSM upgrade, you might experience unexpected behavior.
When upgrading the GSS device from software versions that are earlier than 3.2(0) to software Version 4.1(x), the device will reboot twice to complete the upgrade.
The Cisco Global Site Selector Administration Guide contains the required information to upgrade your GSS software.
This section describes the new and updated GSS software Version 4.1.2 features and contains the following topics:
ANM Configuration Count Enhancement
The Application Networking Manager (ANM) configuration count enhancement allows ANM to detect configuration changes for the ANM objects on GSS. GSS implements a global ANM configuration count where a sequence number gets incremented for each ANM interested object configuration change on GSS. GSS also introduces a new Remote Method Invocation (RMI) method that communicates the current ANM configuration count to the ANM. This enhancement allows ANM to detect and synchronize GSLB configuration changes on the GSS automatically.
Fair Weighted Round-Robin Method
In the fair weighted round-robin balance method, the user assigns a fair weight number to each answer in the answer group that is based on a ratio of the total number of real servers behind each answer in an answer group.When the GSS uses fair weighted round-robin balance method, the GSS cycles through the list of answers that are available as the requests are received. The GSS divides the requests among the answers in a ratio of the number of active real servers behind these answers in the answer group.This ratio is determined by the fair weight value assigned to a particular answer and the KALAP LOAD value for that answer.
In the least loaded method, due to the static nature of load calculation, only an answer with the least load is utilized. In weighted round-robin method, the GSS does not consider the load value of an answer in the answer group. By using the fair weighted round-robin method, the GSS overcomes the drawbacks of least-loaded balance method and weighted round-robin balance method.
Default Continent Region Configuration
The default continent region configuration allows the user to configure seven regions for all the seven continents with respective countries attached from GUI & CLI. Until the previous releases, if the user wants to create a region for any continent, user had to select each and every country and attach it to the region manually. But the number of countries for a particular continent more or less remains the same. Hence, an option to configure regions for all the continents is made available.
New GeoIP Database Version
The new version v002 of the GeoDB database has been added to http://geolite.maxmind.com/download/sec/. The example file name with this version will be similar to cisco_geodb_2011-07-12_v002.tar.gz. All the GeoIP features are supported by both v001 & v002 version of GeoDb database. You can import any one of them. To configure the default continent regions, the latest version (v002) of the GeoDB file must be imported.
Change in Region Limit and Number of States per Region
The maximum number of regions user can configure is 250. Out of the total 250, 7 are reserved for default continent regions & 3 are legacy regions (Central USA, Eastern USA & Western USA) to support backward compatibility. It is recommended not to configure more than 240 regions. If you exceed 243 regions (including legacy regions) then user will not be able to generate default continent regions.
The number of states that can be associated with a region is 500.
This section contains the resolved and open caveats for software version 4.1.2 and contains the following topics:
Resolved Caveats for Software Version 4.1.2
This section lists the resolved caveats for software Version 4.1.2.
•CSCty31316—The DNS server core file gets generated when an ipv6 address is configured as a VIP address with fair weight round-robin balance clause.
Open Caveats for Software Version 4.1.2
This section lists the open caveats for software Version 4.1.2.
•CSCtc76185—When using the CLI to manage the GSS, on rare occasions, the answer suspend functions do not work.
Workaround: Use the GSS GUI to suspend the answer.
•CSCtg97066—When the GSS is integrated with TACACS+ and the user is accessing the GSS GUI, on rare occasions, the process restarts and generates a core.
•CSCtj86311—When HTTP-HEAD KAL response from a VIP is delayed (because FW drops the first three SYNs), the GSS mishandles the TCP session and marks the KAL as failed.
•CSCtk56123—When sticky and proximity are enabled on GSS and under the DNS rule, "Wait" is enabled, the GSS stops serving answers (DNS request timeout on the client end) for some clients.
Workaround: Either disable the sticky or proximity. Or disable the "Wait".
•CSCtt15709—The Show sticky database X command displays an ID number for the answer name instead of an IP address or name.
Workaround: Enter the Show sticky database answer X command for every answer name on the GSS to obtain the ID numbers so you have a reference. The answer field should not contain any space characters.
•CSCty98081—The TCP Probe fails when the port 25 is used with graceful connection termination. This results in VIP going OFFLINE.
Workaround: Change the termination method as Reset instead of Graceful.
•CSCtz64438—The CPU utilization goes high when the debug level logging is enabled and log file size increases.
Workaround: Disable the debug level logging and truncate or delete the huge log files.
•CSCtz64489—The proximity log file size increases when the debug level logging is enabled on the proximity subsystem.
Workaround: Disable debug level logging on proximity.
•CSCtz64504— Reloading of GSS slows down and pauses at "Build properties" due to high CPU utilization.
•CSCtz11052—Unable to download database from the master GSS.
Workaround: Re-create the cluster by executing "gss disable" and "gss enable gssm-primary" on primary.
•CSCtz80103—Upon using the MaxMind GeoIP database which is downloaded after November 21, 2012, the following commands may not display any output and may generate a core file when executed:
–geodb database lookup <ip-address>
–show statistics dns geo-region
Workaround: Use the MaxMind database which is downloaded on or before November 21, 2012.
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:
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.
Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R)
Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.
© 2012 Cisco Systems, Inc. All rights reserved.