[cisco-voip] C2960S Swtich TCAM

[James Jung]

Hi guys

Below shows that IPv4 unicast indirectly-connected routes shows max 0 but 28 used.
Cisco doc says 'If the switch TCAM is full, the hardware routes packets only for destination IP addresses that are in the TCAM. All other IP packets that had a TCAM miss are punted to the CPU. A full TCAM and increasing sw forwarding counts from the show controllers cpu-interface command output means that punted packets are causing high CPU utilization.'

The explanation matches the symptom I have with the switch high cpu utilization.
Can anyone shed some light on this?


show platform tcam utilization

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

 Unicast mac addresses:                       8412/8412        627/627
 IPv4 IGMP groups + multicast routes:          384/384           4/4
 IPv4 unicast directly-connected routes:       320/320          28/28
 IPv4 unicast indirectly-connected routes:       0/0            28/28
 IPv6 Multicast groups:                        320/320          11/11
 IPv6 unicast directly-connected routes:       256/256           1/1
 IPv6 unicast indirectly-connected routes:       0/0             1/1
 IPv4 policy based routing aces:                32/32           12/12
 IPv4 qos aces:                                384/384          41/41
 IPv4 security aces:                           384/384          34/34
 IPv6 policy based routing aces:                16/16            8/8
 IPv6 qos aces:                                 60/60           31/31
 IPv6 security aces:                           128/128           9/9

Thanks in advance for your help.
James Jung.
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