High CPU Uilization on 1941 Router.

[ubitacsupport]

Hello,

We have 1941 router facing High CPU utilization around 98% percent , below is the log can any one help me what is cause for below process.

From Below log IGMP Snooping is taking more of the CPU but IGMP snooping and multicast are disable.

sh process cpu sorted | e 0.00

CPU utilization for five seconds: 98%/25%; one minute: 98%; five minutes: 98%

PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process

86 116330260 471621536 246 49.44% 48.89% 48.46% 0 IGMP Snooping Re

85 34429744 465052929 74 16.34% 16.14% 15.96% 0 IGMP Snooping Pr

152 20662720 400749699 51 5.26% 5.23% 5.21% 0 MRD

6 1667152 24834970 67 1.43% 1.45% 1.44% 0 Pool Manager

93 320740 178453424 1 0.23% 0.28% 0.30% 0 Ethernet Msec Ti

66 285544 2517134 113 0.07% 0.07% 0.07% 0 Per-Second Jobs

[Mark Malone]

yes igmp snooping is causing it , are you sure its completely disabled ?

check as well connected devices aren't the cause a wireshark may show you something if an end device is flooding requests in somehow

If your positive theres no igmp running on this or connecting switch/devices first thing I would do is get off the IOS version could be a bug if its not running somewhere

no ip multicast-routing

no ip igmp snooping

no ip pim ....

Other Events Causing High CPU Utilization

• Frequent or large number of IGMP requests—the CPU processes IGMP messages.
• Large number of IP SLAs monitoring sessions—the CPU generates ICMP or traceroute packets.
• SNMP polling activities, particularly MIB walk—the Cisco IOS SNMP engine executes SNMP requests.
• Large number of simultaneous DHCP requests, such as when links are restored to numerous clients (when the switch is acting as DHCP server).
• ARP broadcast storms.
• Ethernet broadcast storms.