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Cisco 2951 high utilization

hi all,

i'm monitoring a 2951 router for high usage and latency. i've observed rxload is always 255/255.

would like to know if this is some kinda cosmetic bug? TIA!

2951 uptime is 13 weeks, 6 days, 2 hours, 25 minutes

System returned to ROM by power-on

System restarted at 08:23:49 SGT Wed Feb 6 2013

System image file is "flash0:c2951-universalk9-mz.SPA.151-4.M2.bin"

Last reload type: Normal Reload

#sh run int g0/0

Building configuration...

Current configuration : 170 bytes


interface GigabitEthernet0/0

description WAN

ip address 210.x.x.x

no ip route-cache

duplex full

speed 100


#sh int g0/0

GigabitEthernet0/0 is up, line protocol is up

  Hardware is PQ3_TSEC, address is 70ca.9b69.8b00 (bia 70ca.9b69.8b00)

  Description: WAN

  Internet address is 210.x.x.x/30

  MTU 1500 bytes, BW 2048 Kbit/sec, DLY 100 usec,

     reliability 255/255, txload 182/255, rxload 255/255

  Encapsulation ARPA, loopback not set

  Keepalive set (10 sec)

  Full Duplex, 100Mbps, media type is RJ45

  output flow-control is unsupported, input flow-control is unsupported

  ARP type: ARPA, ARP Timeout 04:00:00

  Last input 00:00:00, output 00:00:00, output hang never

  Last clearing of "show interface" counters never

  Input queue: 1/75/557837/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 10815000 bits/sec, 1153 packets/sec

  5 minute output rate 1468000 bits/sec, 764 packets/sec

     14623123094 packets input, 12988754400205 bytes, 0 no buffer

     Received 0 broadcasts (0 IP multicasts)

     0 runts, 0 giants, 148492 throttles

     1 input errors, 1 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 0 multicast, 0 pause input

     12250946257 packets output, 2774799430012 bytes, 0 underruns

     0 output errors, 0 collisions, 2 interface resets

     0 unknown protocol drops

     0 babbles, 0 late collision, 0 deferred

     4 lost carrier, 0 no carrier, 0 pause output

     0 output buffer failures, 0 output buffers swapped out

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Cisco 2951 high utilization

Enable IP Netflow so you can determine WTF is going on and where the traffic is coming from.


Cisco 2951 high utilization

You may need to check the traffic passing on this is genuine traffic. If so hardware upgrade could resolve this as the router is not capable of handling this huge traffic.

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