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Cisco CSS 11000 Series Content Services Switches

Field Notice: Defect Found in WebNS 4.0 on CSS 11800 Series with Source Groups Configured


October 20, 2000



Products Affected

Product

Comments

CSS-11801-AC

Also known as ArrowPoint part numbers CS-800-SYS-03 and CS-800-SYS-01

CSS-11801-DC

?

WebNS 4.0

Defect is only found in WebNS 4.0 builds before build 7s

Problem Description

A CSS 11800 series Content Services Switch running WebNS 4.0 (ap0400003 through ap0400006s) with source groups configured can crash if the following occurs:

  1. An Internet Control Message Protocol (ICMP) echo or echo reply packet is received by one of the Switch Fabric Processors (SFPs).

  2. The SFP determines that the flow information for this source group entry is on another SFP and forwards the message.

  3. The Ipv4SfmForwRx() receive task that receives the ICMP packet on the neighbor SFP crashes.

Any CSS 11800 series Content Services Switch product running WebNS 4.0 should be running build 7s or higher.

Background

Source groups are used to perform Network Address Translation (NAT). A bug was found in WebNS 4.0 for CSS 11800 series Content Services Switch units using source groups. CSS 11800 series Content Services Switch units are chassis-based web switches which have multiple processors, called SFPs.

Problem Symptoms

The CSS 11800 series Content Services Switch is running WebNS 4.0 (ap0400003 - ap0400006s), has source groups configured, and crashes.

Workaround/Solution

Any CSS 11800 series Content Services Switch product running WebNS 4.0 should be running build 7s or higher.

To find out more information about WebNS software and build 7s, refer to the Cisco WebNS Software page.

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: