Specifications

6-2
System Management Software Configuration Guide for Cisco IE 2000U and Connected Grid Switches
Chapter 6 Configuring SDM Templates
Information About the SDM Templates
• Default—The default template gives balance to all functions: Layer 2 and Layer 3 (routing). This
template is available on switches running either the IP Services or LAN Base image. If you do not
use the default template with IP Services image and with routing enabled on the switch (that is, you
use the layer-2 template instead), any routing is done through software, which overloads the CPU
and severely degrades routing performance.
The dual IPv4 and IPv6 templates also enable a dual stack environment. See the “Dual IPv4 and IPv6
SDM Templates” section on page 6-2.
Table 6-1 shows the approximate number of each resource supported in each of the two IPv4 templates.
The values in the template are based on eight routed interfaces and approximately 1024 VLANs and
represent the 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.
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 routing, see the “Configuring IPv6 Unicast Routing” chapter in the Unicast Routing
Software Configuration Guide for Cisco IE 2000U and Connected Grid Switches. For information about
configuring IPv6 ACLs, see the “Configuring IPv6 ACLs” chapter in the Security Software
Configuration Guide for Cisco IE 2000U and Connected Grid Switches.
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 TCAM 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.
Table 6-1 Approximate Number of Feature Resources Allowed by Each Template
Resource Layer-2 Default
Unicast MAC addresses 8 K 5 K
IPv4 IGMP groups + multicast routes (default only) – 1 K
IP v4 IGMP groups (layer-2 only) 1 K –
IPv4 multicast routes (layer-2 only) 0 –
IPv4 IGMP groups and multicast routes 1 K –
IPv4 unicast routes 0 9 K
• Directly connected IPv4 hosts – 5 K
• Indirect IPv4 routes – 4 K
IPv4 policy-based routing ACEs
1
1. ACEs = Access control entries.
0 0.5 K
IPv4 or MAC QoS
2
ACEs
2. QoS = Quality of service.
0.5 K 0.5 K
IPv4 or MAC security ACEs 1 K 1 K