SDM (Switch Database Management), and there are 4 templates:
- ACCESS - For QoS and Security
- ROUTING - for IP Routing
- VLAN - Sets Switch to L2 and disables IP Routing
- Extended Match - for WCCP and multiple VRF (reformats memory space to allow 144-bit L3 TCAM support)
(config)#sdm prefer [routing | dual-ipv4-and-ipv6 | vlan]
(config)#sdm prefer ?
access Access bias
default Default bias
dual-ipv4-and-ipv6 Support both IPv4 and IPv6 <--- USE THIS MODE WHEN YOU HAVE BOTH, IPv4 and IPv6
ipe IPe bias
routing Unicast bias <--- IF YOU USE THE SWITCH AS A ROUTER
vlan VLAN bias <--- ONLY L2 SWITCH
Check the achieved results:
#show sdm prefer
The current template is "desktop default" template. <--- COMMAND NOT ACTIVE BEFORE THE SWITCH HAS BEEN REBOOTED
The selected template optimizes the resources in the switch to support this level of features for 8 routed interfaces and 1024 VLANs.
number of unicast mac addresses: 6K
number of IPv4 IGMP groups + multicast routes: 1K
number of IPv4 unicast routes: 8K
number of directly-connected IPv4 hosts: 6K
number of indirect IPv4 routes: 2K
number of IPv4 policy based routing aces: 0
number of IPv4/MAC qos aces: 0.5K
number of IPv4/MAC security aces: 1K
#show sdm prefer
The current template is "desktop routing" template. <--- AFTER THE REBOOT THE SWITCH CHANGES THE SDM MODE
The selected template optimizes the resources in the switch to support this level of features for 8 routed interfaces and 1024 VLANs.
number of unicast mac addresses: 3K
number of IPv4 IGMP groups + multicast routes: 1K <--- MEMORY ALLOCATION HAS BEEN CHANGED
number of IPv4 unicast routes: 11K
number of directly-connected IPv4 hosts: 3K
number of indirect IPv4 routes: 8K
number of IPv4 policy based routing aces: 0.5K
number of IPv4/MAC qos aces: 0.5K
number of IPv4/MAC security aces: 1K
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