Cisco Catalyst 3750-X User Manual

8-2
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 8 Configuring SDM Templates
Understanding the SDM Templates
Note On switches running the LAN base feature set, routing values shown in the templates are not valid.
The switch also supports multiple dual IPv4 and IP Version 6 (IPv6) templates for environments with
b
oth types of traffic. See the “Dual IPv4 and IPv6 SDM Templates” section on page 8-2.
Table 8-1
lists the approximate numbers of each resource supported in each of the four IPv4 templates.
The first eight rows in the tables (un
icast 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 43, “Configuring IPv6 Unicast Routing.”
This software release does not support IPv6 multicast routing. It also does not support policy-based
routi
ng (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 capac
ity allowed for each resource. Do not use
them if you plan to forward only IPv4 traffic. These SDM templates support IPv4 and IPv6 environments
on switches running the IP base or IP services feature set:
Note Do not select a routing template (sdm prefer dual-ipv4-and-ipv6 routing) when the switch is running
the LAN base feature set. Although visible in the command-line help, the LAN base feature set does not
support routing. On switches running the LAN base feature set, routing values shown in all templates
are not valid.
• 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.
Ta ble 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

Cisco Catalyst 3750-X Specifications

General

Brand	Cisco
Model	Catalyst 3750-X
Category	Switch
Language	English