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TCAM Question: IPv4 unicast indirectly-connected routes

Hi all,

I was LAB testing a 2960X for routing in small sites.

During the test I configured multiple SVIs and the maximum (16) static routes.

While I was doing this I recieved follwing log message:

%PLATFORM_UCAST-4-PREFIX:  One or more, more specific prefixes could not be programmed into TCAM and are being covered by a less specific prefix, and the packets may be software forwarded


Looks like the IPv4 unicast indirectly-connected routes were at its maximum:

2960X#show platform tcam utilization

CAM Utilization for ASIC# 0                      Max            Used
                                             Masks/Values    Masks/values

Unicast mac addresses:                       4316/4316         38/38    
 IPv4 IGMP groups:                             368/368           1/1     
 IPv4 unicast directly-connected routes:       848/848           9/9     
 IPv4 unicast indirectly-connected routes:      80/80           79/79    
 IPv6 Multicast groups:                        320/320          11/11    
 IPv6 unicast directly-connected routes:       816/816           0/0     
 IPv6 unicast indirectly-connected routes:      32/32            3/3     
 IPv4 policy based routing aces:                32/32           12/12    
 IPv4 qos aces:                                384/384          42/42    
 IPv4 security aces:                           384/384          44/44    
 IPv6 policy based routing aces:                16/16            8/8     
 IPv6 qos aces:                                128/128          32/32    
 IPv6 security aces:                           256/256          17/1



What is included in the "IPv4 unicast indirectly-connected routes"?

As obviously I don't have 80 SVIs and or static routes.



1 Reply 1


Hello Bram,

Did you resolve the issue? we are experiencing the same problem on 2960X.

Thank you

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