Chapter 8 Configuring SDM Templates

Understanding the SDM Templates

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

 

 

 

 

 

 

 

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

You can select SDM templates to support IP Version 6 (IPv6). For more information about IPv6 and how to configure IPv6 unicast routing, see Chapter 39, “Configuring IPv6 Unicast Routing.”

This software release does not support IPv6 multicast routing and QoS.

This software release 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.

The dual IPv4 and IPv6 templates allow the switch to be used in dual stack environments (supporting both IPv4 and IPv6). 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, and ACLs 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, and ACLs 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 and ACLs for IPv6 on the switch.

Table 8-2defines the approximate feature resources allocated by each new template for a desktop switch. Template estimations are based on a switch with 8 routed interfaces and 1024 VLANs.

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

8-2

OL-9775-02

 

 

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Cisco Systems 3750E manual Dual IPv4 and IPv6 SDM Templates, Resource Access Default Routing