From: Hansang Bae (hbae@xxxxxxxxxx)
Date: Sat Nov 24 2001 - 02:42:00 GMT-3
At 02:51 PM 11/20/2001 -0500, Aaron T. Hassan wrote:
> > My 2621 is always running freakly busy, the CPU usage is constantly at
> > around 80%, I had tried different IOS versions but nothing help much. The
> > MRTG report shows the bandwidth usage is just at 400k/ps in max,
Kilobits (Kb) or KiloBytes (KB)?
>Mike, here are configs for the gateway router 2621 and CiscoVoIP 5300 on
>the LAN.
>first of all, "sh int" on 2621:
>
>FastEthernet0/0 is up, line protocol is up
> MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
> reliability 255/255, txload 3/255, rxload 4/255
> Full-duplex, 10Mb/s, 100BaseTX/FX
> Output queue 0/40, 0 drops; input queue 0/75, 0 drops
> 5 minute input rate 1631000 bits/sec, 2682 packets/sec
> 5 minute output rate 1259000 bits/sec, 1790 packets/sec
> 678798921 packets input, 1577560122 bytes
> 461254375 packets output, 1437474282 bytes, 0 underruns
> 0 output errors, 0 collisions, 2 interface resets
> 0 babbles, 0 late collision, 0 deferred
>FastEthernet0/1 is up, line protocol is up
> Full-duplex, 100Mb/s, 100BaseTX/FX
> ARP type: ARPA, ARP Timeout 04:00:00
> 5 minute input rate 1265000 bits/sec, 1787 packets/sec
> 5 minute output rate 1628000 bits/sec, 2679 packets/sec
> 461407337 packets input, 1459769135 bytes
> 678941081 packets output, 1595966232 bytes, 0 underruns
> 0 output errors, 0 collisions, 1 interface resets
> 0 babbles, 0 late collision, 11935998 deferred
>the Cisco 2621:
>interface FastEthernet0/0
> description Link to ISP
> speed 10
> full-duplex
>!
>interface FastEthernet0/1
> description Connection to LAN
> ip address 216.xxx.xxx.65 255.255.255.192
> > no throttles on both Eth interfaces. Why the CPU usage is so high? I had
> >
You're pushing a LOT of packets through this guy. Also, your internal LAN
network is running at 100Mbps and your ISP link is running at
10Mbps. Hence the 11,935,998 deferred packets. In a word, your router is
pretty damn busy pushing packets around. You may try throttling the
100Mbps link. For example, using HD on that link would allow the
collisions to naturally throttle the link.
hsb
This archive was generated by hypermail 2.1.4 : Fri Jun 21 2002 - 06:45:22 GMT-3