Cisco Catalyst 3750-E Series, Software Configuration Manual

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8-2
Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-08
Chapter 8 Configuring SDM Templates
Understanding the SDM Templates
The first eight rows in the tables (unicast MAC addresses through security ACEs) represent approximate
hardware boundaries set when a template is selected. If a section of a hardware resource is full, all
processing overflow is sent to the CPU, seriously impacting switch performance. The last row is a
guideline used to calculate hardware resource consumption related to the number of Layer 2 VLANs on
the switch.
Dual IPv4 and IPv6 SDM Templates
The dual IPv4 and IPv6 templates allow the switch to be used in dual stack environments, supporting
both IPv4 and IPv6 traffic. For more information about IPv6 and how to configure IPv6 unicast routing,
see
Chapter 41, “Configuring IPv6 Unicast Routing.”
This software release does not support IPv6 multicast routing. It also does not support policy-based
routing (PBR) when forwarding IPv6 traffic. The software supports IPv4 PBR only when the
dual-ipv4-and-ipv6 routing template is configured.
Using the dual stack templates results in less hardware capacity allowed for each resource. Do not use
them if you plan to forward only IPv4 traffic. These SDM templates support IPv4 and IPv6
environments:
• Dual IPv4 and IPv6 default template—supports Layer 2, multicast, routing, QoS, and ACLs for
IPv4; and Layer 2, routing, ACLs, and QoS for IPv6 on the switch.
•
Dual IPv4 and IPv6 routing template—supports Layer 2, multicast, routing (including policy-based
routing), QoS, and ACLs for IPv4; and Layer 2, routing, ACLs, and QoS for IPv6 on the switch.
• Dual IPv4 and IPv6 VLAN template—supports basic Layer 2, multicast, QoS, and ACLs for IPv4,
and basic Layer 2, ACLs, and QoS for IPv6 on the switch.
Note Cisco IOS Release 12.2(46)SE and later supports IPv6 port-based trust with the dual IPv4 and
IPv6 SDM templates.
You must reload the switch with the dual IPv4 and IPv6 templates for switches running IPv6.
Table 8-2 defines the approximate feature resources allocated by each dual IPv4 and IPv6 template.
Template estimations are based on a switch with 8 routed interfaces and 1024 VLANs.
Table 8-1 Approximate Number of Feature Resources Allowed by Each Template
Resource Access Default Routing VLAN
Unicast MAC addresses 4 K 6 K 3 K 12 K
IGMP groups and multicast routes 1 K 1 K 1 K 1 K
Unicast routes 6 K 8 K 11 K 0
•
Directly connected hosts 4 K 6 K 3 K 0
•
Indirect routes 2 K 2 K 8 K 0
Policy-based routing ACEs 0.5 K 0 0.5 K 0
QoS classification ACEs 0.5 K 0.5 K 0.5 K 0.5 K
Security ACEs 2 K 1 K 1 K 1 K
VLANs 1 K 1 K 1 K 1 K