8-3
Catalyst 3750 Switch Software Configuration Guide
OL-8550-02
Chapter 8 Configuring SDM Templates
Understanding the SDM Templates
• Aggregator dual IPv4 and IPv6 default template—supports Layer 2, multicast, routing, QoS, and
ACLs for IPv4, and Layer 2 and routing for IPv6 on Catalyst 3750-12S aggregator switches.
• Aggregator 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
Catalyst 3750-12S aggregator switches.
• Aggregator 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 Catalyst 3750-12S switches.
Note An IPv4 route requires only one TCAM entry. Because of the hardware compression scheme used for
IPv6, an IPv6 route can take more than one TCAM entry, reducing the number of entries forwarded in
hardware. For example, for IPv6 directly connected IP addresses, the desktop template might allow less
than two thousand entries.
Table 8-2 defines the approximate feature resources allocated by each new template. Template
estimations are based on a switch with 8 routed interfaces and approximately 1000 VLANs.
SDM Templates and Switch Stacks
All stack members use the same SDM desktop or aggregator template that is stored on the stack master.
When a new switch is added to a stack, as with the switch configuration and VLAN database files, the
SDM configuration that is stored on the stack master overrides the template configured on an individual
switch. For more information about stacking, see Chapter 5, “Managing Switch Stacks.”
Table 8-2 Approximate Feature Resources Allowed by Dual IPv4-IPv6 Templates
Resource
Desktop
Default
Desktop
Routing
Desktop
VLAN
Aggregator
Default
Aggregator
Routing
Aggregator
VLAN
Unicast MAC addresses 2 K 1536 8 K 2 K 2K 8 K
IPv4 IGMP groups and multicast routes 1 K 1K 1 K 1 K 1K 0
Total IPv4 unicast routes: 3 K 2816 0 3 K 8K 0
• Directly connected IPv4 hosts 2 K 1536 0 2 K 2K 0
• Indirect IPv4 routes 1 K 1280 0 1 K 6K 1 K
IPv6 multicast groups 1 K 1152 1 K 1 K 2176 1 K
Total IPv6 unicast routes: 3 K 2816 0 3 K 8K 0
• Directly connected IPv6 addresses 2 K 1536 0 2 K 2K 0
• Indirect IPv6 unicast routes 1 K 1280 0 1 K 6K 0
IPv4 policy-based routing ACEs 0 256 0 0 512 0
IPv4 or MAC QoS ACEs (total) 512 512 512 876 896 876
IPv4 or MAC security ACEs (total) 1 K 512 1K 512 1K 1 K
IPv6 policy-based routing ACEs
1
1. IPv6 policy-based routing is not supported.
0 255 0 0 510 0
IPv6 QoS ACEs 510 510 510 876 510 876
IPv6 security ACEs 510 510 510 876 510 876
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