Cisco 2600 router high cpu utilization

[Glitchen]

We have a cisco 2600 series router that is exeriencing high cpu usage. The bandwith usage is only about 20% on a 100mbps pipe when this happens.

When the bandwith is below 20% every thing is ok but after that mark it pegs to 100% usage and connectivity is droped.

I have looked at the ip input process but that seems to be normal.
This is pretty critical can someone give me ideas?
Thanks in advance

Here are the running processes
Process ID Process "CPU Usage
Past 1 minute" "CPU Usage
Past 5 minutes" Prioriity
1.27 AAA Dictionary Recycle 0 0 normal(3)
1.9 ALARM_TRIGGER_SCAN 0 0 low(4)
1.11 ARP Input 0 0 low(4)
1.35 Adj Manager 0 0 normal(3)
1.31 Asy FS Helper 0 0 high(2)
1.48 Authentication Proxy Timer0 0 normal(3)
1.54 CCP manager 0 0 high(2)
1.55 CCP reset pak 0 0 high(2)
1.29 CDP Protocol 0 0 normal(3)
1.66 CEF Scanner 0 0 low(4)
1.52 CEF process 0 0 low(4)
1.44 COPS 0 0 normal(3)
1.5 Check heaps 0 0 low(4)
1.1 Chunk Manager 0 0 critical(1)
1.25 Compute load avgs0 0 critical(1)
1.17 Critical Bkgnd 0 0 critical(1)
1.13 DDR Timers 0 0 normal(3)
1.74 DHCPD Database 0 0 normal(3)
1.42 DHCPD Receive 0 0 normal(3)
1.4 DHCPD Timer 0 0 normal(3)
1.14 Dialer event 0 0 normal(3)
1.15 Entity MIB API 0 0 low(4)
1.1 Environmental monitor 0 0 normal(3)
1.62 FR ARP 0 0 low(4)
1.61 FR Broadcast Output0 0 high(2)
1.6 FR LMI 0 0 high(2)
1.63 FR TUNNEL 0 0 high(2)
1.64 FRF9 manager 0 0 high(2)
1.65 FRF9 timed events 0 0 normal(3)
1.12 HC Counter Timers0 0 normal(3)
1.4 HTTP Timer 0 0 normal(3)
1.22 Hawkeye Background0 0 normal(3)
1.49 IDS Timer 0 0 normal(3)
1.33 IP Background 0 0 normal(3)
1.43 IP Cache Ager 0 0 low(4)
1.28 IP Input 2 4 normal(3)
1.53 IP NAT Ager 0 0 normal(3)
1.34 IP RIB Update 0 0 normal(3)
1.69 IP SNMP 0 0 low(4)
1.47 Inspect Timer 0 0 normal(3)
1.2 Load Meter 0 0 critical(1)
1.19 Logger 0 0 low(4)
1.57 Multilink PPP 0 0 high(2)
1.58 Multilink PPP out0 0 high(2)
1.59 Multilink event 0 0 normal(3)
1.18 Net Background 0 0 normal(3)
1.24 Net Input 0 0 high(2)
1.45 PAD InCall 0 0 high(2)
1.7 PDU DISPATCHER 0 0 normal(3)
1.32 PPP IP Add Route0 0 normal(3)
1.3 PPP auth 0 0 normal(3)
1.56 PPP manager 0 0 normal(3)
1.21 Per-Second Jobs 0 0 normal(3)
1.26 Per-minute Jobs 0 0 normal(3)
1.6 Pool Manager 0 0 critical(1)
1.38 Probe Input 0 0 low(4)
1.39 RARP Input 0 0 normal(3)
1.75 RIP Router 0 0 normal(3)
1.76 RIP Send 0 0 high(2)
1.16 SERIAL A'detect 0 0 normal(3)
1.72 SNMP ConfCopyProc0 0 low(4)
1.71 SNMP ENGINE 1 0 normal(3)
1.68 SNMP Timers 0 0 normal(3)
1.73 SNMP Traps 0 0 normal(3)
1.8 Serial Background0 0 normal(3)
1.41 Socket Timers 0 0 high(2)
1.51 Syslog Traps 0 0 normal(3)
1.37 TCP Protocols 0 0 low(4)
1.36 TCP Timer 0 0 normal(3)
1.2 TTY Background 0 0 normal(3)
1.7 Timers 0 0 normal(3)
1.46 X.25 Background 0 0 normal(3)
1.3 X.25 Encaps Manage 0 0 low(4)

 

[hinesjrh]

It seems that you are running MLPPP and Frame Relay. Is this true? Is the implementation of MLPPP new, as this has been known to be CPU intensive. What changes to the config. or your environment have you recently made? What model of 2600 and what IOS are you running?