I have a 3750G which has got a high CPU (up to 40%), mostly at interrupt level (41%/28%).
I think the problem comes from IP packets that are processed instead of beeing hardware switched.
ROUTER#sh platform ip unicast failed route
Total of 0 covering fib entries
Entries covered by Actual default route(0.0.0.0/0)
10.56.102.0/24 Tbl:0 : Cover:0.0.0.0/0 Tbl:0
10.56.103.0/24 Tbl:0 : Cover:0.0.0.0/0 Tbl:0
(etc... : I've got 9 routes like this)
Total of 9 entries covered by 0.0.0.0/0 Tbl:0
If I understand well this command, it prints out the routes that could not be programmed in the hardware and are thus process-switched by the 3750.
But what can cause these routes not to be programmed in the hardware ? I've checked everything and I can't figure out where the problem comes from...
ROUTER#sh platform tcam utilization
CAM Utilization for ASIC# 0 Max Used
Unicast mac addresses: 672/5376 178/1355
IPv4 IGMP groups: 144/1152 6/26
IPv4 unicast directly-connected routes: 672/5376 178/1355
IPv4 unicast indirectly-connected routes: 144/1152 130/972
IPv6 Multicast groups: 672/5376 178/1355
IPv6 unicast directly-connected routes: 672/5376 178/1355
IPv6 unicast indirectly-connected routes: 128/1024 11/40
IPv4 policy based routing aces: 0/0 0/0
IPv4 qos aces: 512/512 6/6
IPv4 security aces: 1024/1024 22/22
IPv6 policy based routing aces: 0/0 0/0
IPv6 qos aces: 0/0 0/0
IPv6 security aces: 204/510 5/5
I am under the limits for all the groups.
Anyone has got an idea ?