Sdm Templates - Cisco WS-C2960-24LC-S Software Configuration Manual

Understanding IPv6
Figure 29-1
The switch uses ternary content addressable memory (TCAM) to store unicast routes, MAC addresses,
access control lists (ACLs), and other features, and provides the switch database management (SDM)
templates to allocate memory resources depending on how the switch is used. You must use the dual IPv4
and IPv6 template templates to allocate TCAM usage to both IPv4and IPv6 protocols. See the
Templates" section on page

SDM Templates

Catalyst 2960 switches have one TCAM to store unicast routes, MAC addresses, ACLs, and other
features. To allocate TCAM resources for different usages, the switch SDM templates prioritize system
resources to optimize support for certain features. You select the template that best suits the switch
environment by entering the sdm prefer global configuration command. For more information about
SDM templates, see
The dual IPv4 and IPv6 templates allow the switch to be used in dual stack environments (supporting
both IPv4 and IPv6).
Note If you try to configure IPv6 without first selecting a dual IPv4 and IPv6 template, a warning message is
generated.
•
•
Note If you do not plan to use IPv6, do not use the dual stack template because this template results in less
TCAM capacity for each resource.
Catalyst 2960 Switch Software Configuration Guide
29-6
Dual IPv4 and IPv6 Support on an Interface
29-6.
Chapter 7, "Configuring SDM Templates."
In IPv4-only environments, the switch applies IPv4 QoS and ACLs in hardware. IPv6 packets are
not supported.
In dual IPv4 and IPv6 environments, the switch applies IPv4 QoS and ACLs in hardware.
IPv4
10.1.1.1
IPv6
3ffe:yyyy::1
Chapter 29 Configuring IPv6 Host Functions
"SDM
OL-8603-04