Cisco 7500 Series Routers

Field Notice: VIP2 Cisco IOS Software Release Deferrals

Revised May 14, 1997

May 22, 1997

Products Affected

Caution: To prevent system problems, we strongly recommend that you read this field alert.

The following VIP2-based products (and product numbers) are affected by this field notice:

  • Versatile Interface Processors (VIP2s):

    • VIP2-10(=)

    • VIP2-15(=)

    • VIP2-20(=)

    • VIP2-40(=)

  • Packet OC3 Interface Processors (POSIPs):

    • POSIP-OC3-20-sm(=)

    • POSIP-OC3-20-mm(=)

    • POSIP-OC3-40-sm(=)

    • POSIP-OC3-40-mm(=)

  • Channelized T3 Interface Processors (CT3IPs):

    • CT3IP-20(=)

    • CT3IP-40(=)

Note:?The minimum Cisco IOS software recommendations in this field alert supersede the Cisco IOS software information and recommendations stated in the installation and configuration publications that shipped with your VIP2-based products.

Problem Description

A number of problems have been found that affect all Cisco Systems VIP2, POSIP, and CT3IP products.

In summary, the symptoms a user may experience include the following errors:

  • Protocol checksum errors

  • Packet drops

  • Other anomalous packet errors

(For problem descriptions, refer to Bug IDs CSCdi67315, CSCdj08722, and CSCdj09576.)

These symptoms occur when the listed products are installed in Cisco 7500 series systems and in Cisco 7000 series systems equipped with the 7000 Series Route Switch Processor (RSP7000), running VIP2-compatible, Cisco IOS software images (also called subsets and feature sets).

Cisco strongly recommends upgrading all VIP2-based Cisco 7500 and 7000 systems equipped with the RSP7000 processor to the Cisco IOS releases mentioned in Table 2.

Problem Details

This field alert addresses multiple problem reports as defined by the Bug IDs listed in the preceding section. For specific information on any of these issues, refer to the specific problem descriptions in each BugID. Each problem might cause a number of protocol-related failures including, but not limited to, TCP checksum errors and other possible packet data errors.

Note:?If you are a registered CCO user and you have logged in, you can view bug details.

Affected Cisco IOS Software Releases and Images

The Cisco IOS software releases and images affected by this problem include every Cisco IOS software release and image that provides VIP2 support. All such Cisco IOS software releases and images will be deferred; they will no longer be available via CCO or shipped with systems as of the dates listed in Table 2. This includes all Cisco IOS software image names with rsp and v in them. (For example, rsp-pv-mz.111-10, rsp-ajv-mz.111-10, rsp-pv-mz.112-5, rsp-ajsv-mz.112-5, and so forth.)

The affected/deferred Cisco IOS software images are listed in Table 1.

Table 1: Deferred Cisco IOS Software Images

11.1 Releases

11.1CA Releases

11.2 Releases

11.1(4), all rsp-v images

11.1(5)CA, all rsp-v images

11.2(2), all rsp-v images

11.1(5), all rsp-v images

11.1(6)CA, all rsp-v images

11.2(3), all rsp-v images

11.1(6), all rsp-v images

11.1(7)CA1, all rsp-v images

11.2(4), all rsp-v images

11.1(7), all rsp-v images

11.1(8)CA, all rsp-v images

11.2(5), all rsp-v images

11.1(8), all rsp-v images

11.1(9)CA1, all rsp-v images


11.1(9), all rsp-v images

? ?

11.1(10), all rsp-v images

? ?

11.1(11), all rsp-v images

? ?

Note:?The system conditions that could cause one of the described failure conditions to occur are expected to be rare; however, because of the severity of the problems, the Cisco IOS software images listed in Table 1 are deferred, effective immediately.

Table 2, which follows, defines the new images that are available via Cisco Connection Online (CCO). (For instructions on accessing CCO, refer to the section "Cisco Connection Online".)

Systems not requiring VIP2 support are not affected by this field alert or the problems it describes. This includes all Cisco IOS Release 10.3, Release 11.0, and non-VIP2 Release 11.1 images.


To eliminate the problems mentioned in the preceding section, we strongly recommend that you download and install one of the Cisco IOS software release updates listed in Table 2:

Table 2 : Cisco IOS Software Release Updates

If you are using a VIP2-based product with Cisco IOS Release...

Replace it with Release Update...

Which is available via CCO by...

11.1(n)CA through 11.1(9)CA

11.1(10)CA (11.1.10-CA)

Tuesday, 5/12/97

11.1(n) through 11.1(11)

11.1(11a) (11.1.11-a)

Tuesday, 5/13/97

11.2(n) through 11.2(5)

11.2(6) (11.2.6)

Tuesday, 5/13/97

11.2(2)F through 11.2(5)F*

11.2(6) / 11.2(6)P

Tuesday, 5/20/97

* Cisco will be releasing a Cisco IOS 11.2(n)F release in the future. This release will FCS when a appropriate level of testing has been completed to reach a known level of quality consistant with an Early Deployment Release.

Note:?This affects only Cisco IOS software releases supporting the VIP2 and VIP2-based products in Cisco 7500 series systems, and Cisco 7000 series systems equipped with the RSP7000.

Cisco Connection Online

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 For additional information, contact

Accessing CCO

Use the following example procedure to access the World Wide Web (WWW) version of CCO:

  1. Access the WWW version of CCO appropriate to your location and as indicated in the section "Cisco Connection Online"; then proceed to Step 2, which follows.

  2. When you have accessed CCO, click on LOGIN to log in to CCO.

  3. Click on Service and Support.

  4. Click on Software Center.

  5. Click on Cisco Software Center.

  6. Click on Cisco IOS Software.

  7. Locate Software Upgrade Planners, then click on the appropriate Cisco IOS software release listed below Software Upgrade Planners.

This completes the procedure for accessing CCO.

Use the information in the Software Upgrade Planner to discover which specific Cisco IOS software release you require, and to download the appropriate Cisco IOS software release update.

Downloading a Cisco IOS Software Release Update

Use the following example procedure to use the Software Upgrade Planner and to download a Cisco IOS software release update:

  1. Select the hardware. (This is the hardware you have; for example, select 7500).

  2. Select the release for 7500. (For example select the software release update 11.1.11)

  3. Select the software for the release 11.1.11 and hardware 7500. (Select either Enterprise/APPN or Enterprise.); then select the amount of memory you have currently installed, or will install prior to upgrading, in your target platform. (This refers to the size of Flash memory/RAM to which you want to download your Cisco IOS release update).

  4. Click on Execute to download the Cisco IOS software release update to your system.

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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