SDM TEMPLATE 3400 Switch

So working on a clients' network they had complaints of not accessing the internet ( who doesn't say this to the network guy right?).
So looking further into it I noticed an error kept coming up on their edge device:




  %PLATFORM_UCAST   

What this error explains is that there is something wrong with Unicast Routing

"show ip platform ip unicast failed route"

            This will show the failed unicast routes (which in this case were all)

"show interface ____"
                Show the interface in question to check the input and output errors/drops

                      
•Routing—The routing template maximizes system resources for unicast routing, typically required for a router or aggregator in the center of a network.
•VLANs—The VLAN template disables routing and supports the maximum number of unicast MAC addresses. It would typically be selected for a Layer 2 switch.
•Default—The default template gives balance to all functions.
•Access—The access template maximizes system resources for access control lists (ACLs) to accommodate a large number of ACLs.


The template the client was using was a Layer-2 template. 


sw1#sh sdm prefer ?  default             Default bias  dual-ipv4-and-ipv6  Support both IPv4 and IPv6  layer-2             No routing  |                   Output modifiers  <cr>
nwp-3400-sw1#sh sdm prefer layer-2nwp-3400-sw1#sh sdm prefer layer-2 "layer-2" template: 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:                  8K  number of IPv4 IGMP groups:                       1K  number of IPv4 multicast routes:                  0  number of IPv4 unicast routes:                    0  number of IPv4 policy based routing aces:         0  number of IPv4/MAC qos aces:                      0.5K  number of IPv4/MAC security aces:                 1K

In the Layer 2 template you can see how many IPv4 unicast routes are allowed a big fat ZERO.


So they needed a changed over to the default template which will give them routing capabilities and all functions in a balance.

sw1#sh sdm prefer default
 "default" template:
 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:                  5K
  number of IPv4 IGMP groups + multicast routes:    1K
  number of IPv4 unicast routes:                    9K
    number of directly-connected IPv4 hosts:        5K
    number of indirect IPv4 routes:                 4K
  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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