|
|
June 19, 2000
These release notes describe the features and caveats for Cisco DistributedDirector System Software (Cisco IOS Release 11.1 IA), beginning with Release 11.1(9)IA, up to and including Release 11.1(28)IA.
These release notes discuss the following topics:
Cisco DistributedDirector documentation is a combined installation and configuration guide for DistributedDirector hardware. Functionality specific to Cisco DistributedDirector System Software is included in the configuration chapters in the following publications:
These documents are available as printed manuals or electronic documents at:
http://www.cisco.com/univercd/cc/td/doc/product/iaabu/distrdir/index.htm
Cisco DistributedDirector System Software (Release 11.1 IA) supports the following platforms:
Table 1 summarizes the LAN interfaces supported on each platform.
| Interface | DistributedDirector 2501 | DistributedDirector 2502 | DistributedDirector 4700-M |
|---|---|---|---|
Ethernet (AUI) | Yes | No | Yes |
Ethernet (10BaseT) | No | No | Yes |
Fast Ethernet (100BaseTX) | No | No | Yes |
Fast Ethernet (100BaseT4) | No | No | Yes |
4-Mbps Token Ring | No | Yes | Yes |
16-Mbps Token Ring | No | Yes | Yes |
FDDI Multimode DAS | No | No | Yes |
One feature set (image) is available for each DistributedDirector platform.
Table 2 shows memory requirements for the Cisco DistributedDirector Sets.
| Router | Minimum Required Code Memory | Required Main Memory | Release 11.1 IA Runs from |
|---|---|---|---|
| Cisco DistributedDirector 2501 | 8 MB Flash | 8 MB RAM | Flash |
Cisco DistributedDirector 2502 | 8 MB Flash | 8 MB RAM | Flash |
| Cisco DistributedDirector 4700-M | 16 MB Flash | 32 MB RAM | RAM |
http://www.cisco.com/univercd/cc/td/doc/product/iaabu/distrdir/ddenh3.htm
The DistributedDirector now supports the following three new features:
Prior to this enhancement, DistributedDirector would return a single Resource Record (RR) in each DNS response. This was normally sufficient, but for some applications, server failover will occur more rapidly when applications are provided IP addresses of multiple servers.
The Enhanced Fault Tolerance with Multiple Resource Records feature enables DistributedDirector to return multiple RR. The number of RR returned in a single reply is configurable. The default number of RR returned is one.
The Critical Event Recording with Syslog feature enables DistributedDirector to log critical events by way of the the industry-standard syslog system. Server state is logged, providing a useful log of when servers are considered up or down. Additionally, the server selection process may be logged. In both cases, the logging priority level is "informational."
Prior to this enhancement, DistributedDirector could evaluate server status by performing a TCP connect test to a single port. The Enhanced Server Verification with Multiple Port Connect Test feature allows multiple connect ports to be specified. If any one of the connect tests fail, the server is considered down.
http://www.cisco.com/univercd/cc/td/doc/product/iaabu/distrdir/ddenh2.htm
The DistributedDirector now supports the following four new features:
The Support for Domain Name System (DNS) Mail Exchange (MX) Records feature enables transparent global load distribution of Simple Mail Transfer Protocol (SMTP)-based e-mail services. This enables Cisco DistributedDirector to redirect client e-mail requests to the best SMTP server by way of a single DNS MX Resource Record. Cisco DistributedDirector then sends a single DNS MX resource record to the client that identifies the best available SMTP server. Cisco DistributedDirector can use all of its decision-making metrics to determine the best SMTP server for a client request.
The Policy Redirection feature enables the Cisco DistributedDirector to direct IP services to a single server or distribute IP service requests across a subset of servers based on IP address and mask. This feature also introduces special access control lists (ACLs) that identify a set of servers to be used for queries for a specific DistributedDirector host name.
The Unlimited Number of IP Addresses Per Virtual Hostname feature enables the Cisco DistributedDirector to support an unlimited number of IP addresses per virtual host name. Previously, each virtual host name could only support a maximum of eight IP addresses.
The Per-Hostname Time-to-Live (TTL) feature enables Cisco DistributedDirector to configure the TTL values of its Domain Name System (DNS) resource records. Each virtual host name can have a unique TTL configuration. This feature applies only to address and mail exchange resource records generate by Cisco DistributedDirector---not resource records relayed from a forwarding server through Cisco DistributedDirector.
http://www.cisco.com/univercd/cc/td/doc/product/iaabu/distrdir/ddenh.htm
The DistributedDirector and Director Response Protocol (DRP) now support additional traffic redirection criteria. In addition to making redirection decisions based on client-to-server topological proximity using DRP, random distribution, and administrative preferences, the DistributedDirector now supports the DRP-MED option, the DRP-RTT metric, the "portion" metric, and the DRP-RTT Tolerance parameter.
This section describes important information about using the Cisco IOS Release 11.1 IA software.
There are no known and documented serious defects unique to the Cisco DistributedDirector System Software for Cisco IOS Release 11.1(28)IA. For additional caveats applicable to Release 11.1(28)IA, access Cisco Connection Online (CCO) as described in the section "Cisco Connection Online" later in this document.
There were no major modifications made in this release.
There are no known and documented serious defects unique to the Cisco DistributedDirector System Software for Cisco IOS Release 11.1(27)IA. For additional caveats applicable to Release 11.1(27)IA, access Cisco Connection Online (CCO) as described in the section "Cisco Connection Online" later in this document.
There were no major modifications made in this release.
This section describes possibly unexpected behavior by Release 11.1(26)IA. Unless otherwise noted, these caveats apply to all 11.1 releases up to and including 11.1(26)IA. For additional caveats applicable to Release 11.1(26)IA, see the caveats sections for newer 11.1 releases. The caveats for newer releases precede this section.
All the caveats listed in this section are resolved in release 11.1(27)IA.
This section describes possibly unexpected behavior by Release 11.1(25)IA. Unless otherwise noted, these caveats apply to all 11.1 IA releases up to and including 11.1(25)IA.
Only serious caveats are described in these release notes. For the complete list of caveats against this release, use the Documentation CD-ROM or access CCO as described in the section "Cisco Connection Online" at the end of this document.
All the caveats listed in this section are resolved in Release 11.1(26)IA.
This section describes possibly unexpected behavior by Release 11.1(24)IA. Unless otherwise noted, these caveats apply to all 11.1 IA releases up to and including 11.1(24)IA.
Only serious caveats are described in these release notes. For the complete list of caveats against this release, use the Documentation CD-ROM or access CCO as described in the section "Cisco Connection Online" at the end of this document.
All the caveats listed in this section are resolved in Release 11.1(25)IA.
There are no known and documented serious defects unique to the Cisco DistributedDirector System Software for Cisco IOS Release 11.1(23)IA. For additional caveats applicable to Release 11.1(23)IA, access Cisco Connection Online (CCO) as described in the section "Cisco Connection Online" later in this document.
There were no major modifications made in this release.
There are no known and documented serious defects unique to the Cisco DistributedDirector System Software for Cisco IOS Release 11.1(22)IA. For additional caveats applicable to Release 11.1(22)IA, access Cisco Connection Online (CCO) as described in the section "Cisco Connection Online" later in this document.
There were no major modifications made in this release.
This section describes possibly unexpected behavior by Release 11.1(21)IA. Unless otherwise noted, these caveats apply to all 11.1 IA releases up to and including 11.1(21)IA.
Only serious caveats are described in these release notes. For the complete list of caveats against this release, use the Documentation CD-ROM or access CCO as described in the section "Cisco Connection Online" at the end of this document.
All the caveats listed in this section are resolved in Release 11.1(22)IA.
There are no known and documented serious defects unique to the Cisco DistributedDirector System Software for Cisco IOS Release 11.1(20)IA. For additional caveats applicable to Release 11.1(20)IA, access Cisco Connection Online (CCO) as described in the section "Cisco Connection Online" later in this document.
There were no major modifications made in this release.
This section describes possibly unexpected behavior by Release 11.1(19)IA. Unless otherwise noted, these caveats apply to all 11.1 IA releases up to and including 11.1(19)IA.
Only serious caveats are described in these release notes. For the complete list of caveats against this release, use the Documentation CD-ROM or access CCO as described in the section "Cisco Connection Online" at the end of this document.
All the caveats listed in this section are resolved in Release 11.1(20)IA.
There are no known and documented serious defects unique to the Cisco DistributedDirector System Software for Cisco IOS Release 11.1(18)IA. For additional caveats applicable to Release 11.1(18)IA, access Cisco Connection Online (CCO) as described in the section "Cisco Connection Online" later in this document.
There were no major modifications made in this release.
This section describes possibly unexpected behavior by Release 11.1(17)IA. Unless otherwise noted, these caveats apply to all 11.1 IA releases up to and including 11.1(17)IA. For additional caveats applicable to 11.1(17)IA, see the caveats sections for newer releases that precede this section.
Only serious caveats are described in these release notes. For the complete list of caveats against this release, use the Documentation CD-ROM or access CCO as described in the section "Cisco Connection Online" at the end of this document.
All caveats listed in this section are resolved in Release 11.1(18)IA.
This section describes possibly unexpected behavior by Release 11.1(16)IA. Unless otherwise noted, these caveats apply to all 11.1 IA releases up to and including 11.1(16)IA. For additional caveats applicable to 11.1(16)IA, see the caveats sections for newer releases that precede this section.
Only serious caveats are described in these release notes. For the complete list of caveats against this release, use the Documentation CD-ROM or access CCO as described in the section "Cisco Connection Online" at the end of this document.
All caveats listed in this section are resolved in Release 11.1(17)IA.
This section describes possibly unexpected behavior by Release 11.1(15)IA. Unless otherwise noted, these caveats apply to all 11.1 IA releases up to and including 11.1(15)IA. For additional caveats applicable to 11.1(15)IA, see the caveats sections for newer releases that precede this section.
Only serious caveats are described in these release notes. For the complete list of caveats against this release, use the Documentation CD-ROM or access CCO as described in the section "Cisco Connection Online" at the end of this document.
All caveats listed in this section are resolved in Release 11.1(16)IA.
in-addr.arpa record in the request, the request will corrupt memory resulting in a crash. This section describes possibly unexpected behavior by Release 11.1(14)IA. Unless otherwise noted, these caveats apply to all 11.1 IA releases up to and including 11.1(14)IA. For additional caveats applicable to 11.1(14)IA, see the caveats sections for newer releases that precede this section.
Only serious caveats are described in these release notes. For the complete list of caveats against this release, use the Documentation CD-ROM or access CCO as described in the section "Cisco Connection Online" at the end of this document.
All caveats listed in this section are resolved in Release 11.1(15)IA.
There are no known and documented serious defects unique to the Cisco DistributedDirector System Software for Cisco IOS Release 11.1(13)IA. For additional caveats applicable to Release 11.1(13)IA, access Cisco Connection Online (CCO) as described in the section "Cisco Connection Online" later in this document.
There were no major modifications made in this release.
There are no known and documented serious defects unique to the Cisco DistributedDirector System Software for Cisco IOS Release 11.1(12)IA. For additional caveats applicable to Release 11.1(12)IA, access Cisco Connection Online (CCO) as described in the section "Cisco Connection Online" later in this document.
There were no major modifications made in this release.
There are no known and documented serious defects unique to the Cisco DistributedDirector System Software for Cisco IOS Release 11.1(11)IA. For additional caveats applicable to Release 11.1(11)IA, access Cisco Connection Online (CCO) as described in the section "Cisco Connection Online" later in this document.
There were no major modifications made in this release.
This section describes possibly unexpected behavior by Release 11.1(10)IA. Unless otherwise noted, these caveats apply to all 11.1 IA releases up to and including 11.1(10)IA. For additional caveats applicable to 11.1(10)IA, see the caveats sections for newer releases that precede this section.
Only serious caveats are described in these release notes. For the complete list of caveats against this release, use the Documentation CD-ROM or access CCO as described in the section "Cisco Connection Online" at the end of this document.
All caveats listed in this section are resolved in Release 11.1(11)IA.
This section describes possibly unexpected behavior by Release 11.1(9)IA. Unless otherwise noted, these caveats apply to all 11.1 IA releases up to and including 11.1(9)IA. For additional caveats applicable to 11.1(9)IA, see the caveats sections for newer releases that precede this section.
Only serious caveats are described in these release notes. For the complete list of caveats against this release, use the Documentation CD-ROM or access CCO as described in the section "Cisco Connection Online" at the end of this document.
All caveats listed in this section are resolved in Release 11.1(10)IA.
Cisco Connection Online (CCO) is Cisco Systems' primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional information and services.
Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Cisco's customers and business partners. CCO services include product information, product documentation, software updates, release notes, technical tips, the Bug Navigator, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.
CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously: a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and it is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.
You can access CCO in the following ways:
For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.
Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM, a member of the Cisco Connection Family, is updated monthly. Therefore, it might be more current than printed documentation. To order additional copies of the Documentation CD-ROM, contact your local sales representative or call customer service. The CD-ROM package is available as a single package or as an annual subscription. You can also access Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.
If you are reading Cisco product documentation on the World Wide Web, you can submit comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco. We appreciate your comments.
Posted: Fri Jun 16 15:27:39 PDT 2000
Copyright 1989 - 2000©Cisco Systems Inc.