[cisco-bba] Cisco 7206VXR running out of steam at 20mbthroughput

[Oliver Boehmer (oboehmer)]

Wayne,

which NPE do you use?

I see that you're switching many very small packets through the box (~
80 byte/pkt average), which could explain the high usage with a moderate
bandwidth. 
In an IMIX environment, you'd be able to switch approximately 5-8 times
as much (as the avg. packet size is much higher)..

I guess you need a faster NPE..

	oli


Wayne @ CTL <> wrote on Thursday, May 17, 2007 7:20 PM:

> Hi Frank, Jason, thanks for your replies.
> The half duplex was set for another test I have reset it to
> full-duplex. Not sure about the implications of Vlan the subnets, and
> I tried ip route-cache same-interface, it had no effect but I guess
> it may take time if its a cache.
> 
> Here are the results of the show procs and i/f:-
> 
> Router#sh proc cpu | exc 0.00.*0.00
> CPU utilization for five seconds: 62%/62%; one minute: 61%; five
> minutes: 60%
>  PID Runtime(ms)   Invoked      uSecs   5Sec   1Min   5Min TTY Process
>   29      337020    111884       3012  0.00%  0.03%  0.01%   0 Net
> Background
> 
>   32     1613052    468318       3444  0.07%  0.20%  0.17%   0
> Per-Second Jobs
> 
>  123         824       120       6866  0.00%  0.02%  0.06%   0 Exec
> 
> Router#show int f0/0
> FastEthernet0/0 is up, line protocol is up
>   Hardware is DEC21140A, address is 0050.2aca.2400 (bia
>   0050.2aca.2400) Internet address is 212***/30
>   MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
>      reliability 255/255, txload 63/255, rxload 64/255
>   Encapsulation ARPA, loopback not set
>   Keepalive set (10 sec)
>   Full-duplex, 100Mb/s, 100BaseTX/FX
>   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 04:14:20
>   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops:
>   0 Queueing strategy: fifo
>   Output queue: 0/40 (size/max)
>   5 minute input rate 25472000 bits/sec, 40880 packets/sec
>   5 minute output rate 24730000 bits/sec, 38624 packets/sec
>      614086423 packets input, 1854036321 bytes
>      Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
>      370 input errors, 0 CRC, 0 frame, 0 overrun, 370 ignored
>      0 watchdog
>      0 input packets with dribble condition detected
>      568907290 packets output, 2654008434 bytes, 0 underruns
>      0 output errors, 0 collisions, 0 interface resets
>      0 babbles, 0 late collision, 0 deferred
>      0 lost carrier, 0 no carrier
>      0 output buffer failures, 0 output buffers swapped out
> 
> 
> Router#show int f1/0
> FastEthernet1/0 is up, line protocol is up
>   Hardware is DEC21140, address is 0050.2aca.241c (bia 0050.2aca.241c)
>   Internet address is 212.***/27
>   MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
>      reliability 253/255, txload 65/255, rxload 63/255
>   Encapsulation ARPA, loopback not set
>   Keepalive set (10 sec)
>   Full-duplex, 100Mb/s, 100BaseTX/FX
>   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 04:15:01
>   Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops:
>   56560 Queueing strategy: fifo
>   Output queue: 0/40 (size/max)
>   5 minute input rate 24802000 bits/sec, 38766 packets/sec
>   5 minute output rate 25523000 bits/sec, 40978 packets/sec
>      571887898 packets input, 2950256234 bytes
>      Received 60253 broadcasts, 0 runts, 673 giants, 0 throttles
>      9379444 input errors, 9379388 CRC, 0 frame, 0 overrun, 56 ignored
>      0 watchdog
>      4631020 input packets with dribble condition detected
>      617023050 packets output, 2136329926 bytes, 0 underruns
>      0 output errors, 9521056 collisions, 1 interface resets
>      0 babbles, 0 late collision, 0 deferred
>      0 lost carrier, 0 no carrier
>      0 output buffer failures, 0 output buffers swapped out
> 
> Thanks,
> 
> Wayne
> 
> 
> ----- Original Message -----
> From: Frank Bulk
> To: 'Wayne @ CTL' ; cisco-bba at puck.nether.net
> Sent: Thursday, May 17, 2007 4:27 PM
> Subject: RE: [cisco-bba] Cisco 7206VXR running out of steam at 20mb
> throughput
> 
> 
> Please post a copy of "sh proc cpu | exc 0.00.*0.00"
> 
> Regards,
> 
> Frank
> 
> _______________________________________________
> cisco-bba mailing list
> cisco-bba at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-bba