Hi Forum,
In recent time we observed that one of our routers CPU has spiked abnormally. Even though the amount of bandwidth passing through the Router has increased but its no where proportional to the spike in the CPU. About two weeks ago the overall CPU was less than 20%, which at present is around 40%-60%. A couple of days back it was hovering around 80%+ mark.
Approx BW passing through the router is around 13Gbps during peak times. This router doesn't hold eBGP full feed. It runs OSPF/BGP/Multicast/MPLS services along with few ACLs and no QoS. It also doesn't hold any direct client facing interfaces.
Hardware information along with some show commands are shared below:
Chassis: 7606
SUP: 2 x [WS-SUP720-3B + WS-SUP720 MSFC3 Daughterboard + WS-F6K-PFC3B Policy Feature Card 3]
10G LC: 2 x [WS-X6704-10GE + WS-F6700-CFC]
1G LC: 1 x WS-X6408A-GBIC + 1 x WS-X6516A-GBIC
Attached are show version & show proc cpu hist outputs. I googled through some of the links found under forums as well as under cisco's site. But haven't been able to figure out any specific reason.
Please suggest and feel free to query for any further logs/info.
sh mls cef summary
Total routes: 15844
IPv4 unicast routes: 14638
IPv4 Multicast routes: 21
MPLS routes: 1168
IPv6 unicast routes: 14
IPv6 multicast routes: 3
EoM routes: 3
sh proc cpu sort | ex 0.00%
CPU utilization for five seconds: 40%/31%; one minute: 41%; five minutes: 42%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
201 5262632002806335232 0 7.91% 7.24% 7.27% 0 IP Input
11 36612360 97483067 375 0.23% 0.15% 0.12% 0 ARP Input
516 15545444 282648677 54 0.15% 0.05% 0.03% 0 OSPF-100 Hello
297 85523128 221162540 386 0.07% 0.18% 0.18% 0 OSPF-100 Router
361 83265660 259267889 321 0.07% 0.57% 0.65% 0 LFDp Input Proc
2 9895592 12559300 787 0.07% 0.06% 0.07% 0 Load Meter
203 31994296 181891950 175 0.07% 0.04% 0.05% 0 ADJ resolve proc
sh mls statistics
Statistics for Earl in Module 6
L2 Forwarding Engine
Total packets Switched : 49985702672136
L3 Forwarding Engine
Total packets Processed : 44605491282541 @ 1761144 pps
Total packets L3 Switched : 43409223699193 @ 1723987 pps
Total Packets Bridged : 1048240217848
Total Packets FIB Switched : 43409223699193
Total Packets ACL Routed : 0
Total Packets Netflow Switched : 0
Total Mcast Packets Switched/Routed : 3242987580
Total ip packets with TOS changed : 2
Total ip packets with COS changed : 2
Total non ip packets COS changed : 0
Total packets dropped by ACL : 7696946466
Total packets dropped by Policing : 0
Total packets exceeding CIR : 0
Total packets exceeding PIR : 0
Errors
MAC/IP length inconsistencies : 51
Short IP packets received : 0
IP header checksum errors : 2
No-route packet drops : 75391210
TTL failures : 1412616928
MTU failures : 158400
Total packets L3 Processed by all Modules: 44605491282541 @ 1761144 pps
Best Regards,
Tahmeed
