Catalyst 2960-S switches internally support up to 16 different control plane queues. Each queue is
dedicated to handling specific protocol packets and is assigned a priority level. For example, STP, routed,
and logged packets are sent to three different control plane queues, which are prioritized in
corresponding order, with STP having the highest priority. Each queue is allocated a certain amount of
processing time based on its priority. The processing-time ratio between low-level functions and
high-level functions is allocated as 1-to-2. Therefore, the control plane logic dynamically adjusts the
CPU utilization to handle high-level management functions as well as punted traffic (up to the maximum
CPU processing capacity). Basic control plane functions, such as the CLI, are not overwhelmed by
functions such logging or forwarding of packets.

Updates to the Software Configuration Guide

In the “Configuring RIP for IPv6” section in the “Configuring IPv6 Unicast Routing” chapter, the task
table is incorrect. This is the correct table:

Command

Purpose

Step 1

configure terminal

Enter global configuration mode.

Step 2

ipv6 router rip name

Configure an IPv6 RIP routing process, and enter router
configuration mode for the process.

Step 3

maximum-paths number-paths

(Optional) Define the maximum number of equal-cost routes
that IPv6 RIP can support. The range is from 1 to 32, and the
default is 16 routes.

Step 4

exit

Return to global configuration mode.

Step 5

interface interface-id

Enter interface configuration mode, and specify the Layer 3
interface to configure.

Step 6

ipv6 rip name enable

Enable the specified IPv6 RIP routing process on the interface.