Cisco WS-C3560E-24PD-E User Manual

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Catalyst 3560 Switch Command Reference
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Chapter 2 Catalyst 3560 Switch Cisco IOS Commands
sdm prefer
The access template maximizes system resources for access control lists (ACLs) as required to
accommodate a large number of ACLs.
The default template balances the use of system resources.
Use the sdm prefer vlan global configuration command only on switches intended for Layer 2 switching
with no routing. When you use the VLAN template, no system resources are reserved for routing entries,
and any routing is done through software. This overloads the CPU and severely degrades routing
performance.
Do not use the routing template if you do not have routing enabled on your switch. Entering the sdm
prefer routing global configuration command prevents other features from using the memory allocated
to unicast routing in the routing template.
Do not use the ipv4-and-ipv6 templates if you do not plan to enable IPv6 routing on the switch. Entering
the sdm prefer ipv4-and-ipv6 {default | vlan} global configuration command divides resources
between IPv4 and IPv6, limiting those allocated to IPv4 forwarding.
Table 2-15 lists the approximate number of each resource supported in each of the IPv4-only templates
for a switch. The values in the template are based on eight routed interfaces and approximately one
thousand 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.
Table 2-16lists the approximate number of each resource supported in each of the IPv4-and IPv6
templates for a switch.
Table 2-15 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 access control entries
(ACEs)
512 0 512 0
Quality of service (QoS) classification ACEs 512 512 512 512
Security ACEs 2 K1 K1 K1 K
Layer 2 VLANs 1 K 1 K 1 K 1 K
Table 2-16 Approximate Feature Resources Allowed by Dual IPv4-IPv6 Templates
Resource Default VLAN
Unicast MAC addresses 2 K 8 K
IPv4 IGMP groups and multicast routes 1 K 1 K
Total IPv4 unicast routes: 3 K 0
• Directly connected IPv4 hosts 2 K 0
• Indirect IPv4 routes 1 K 0
IPv6 multicast groups 1 K 1 K

Cisco WS-C3560E-24PD-E Specifications

General

Brand	Cisco
Model	WS-C3560E-24PD-E
Category	Switch
Language	English