[nsp] high cpu load on 2651

[Jim Littlefield]

Hmm...accounting was turned on to help debug the problem. I guess we 
forgot to turn it off. Looks like I need to strip these back to the bare 
minimum and go from there.

Thanks,


Beprojects.com wrote:

>Any numbers that Cisco list's are IP only, downhill, with a wind at it's
>back.  You're running IP, IPX, 802.1Q, IP Multicast, STUN, Accounting, RIP
>and EIGRP.  Every feature you enable slows down the packet throughput.  I
>suspect the biggest culprit is Accounting.  And a 45M link with 40 byte
>packets is ~140,000pps.  You could easily overrun the router's cpu on that
>speed link.  Or you could overrun it going from FE to FE.
>
>----- Original Message ----- 
>From: "Jim Littlefield" <little at abaqus.com>
>To: <cisco-nsp at puck.nether.net>
>Sent: Tuesday, January 13, 2004 9:19 AM
>Subject: Re: [nsp] high cpu load on 2651
>
>
>  
>
>>Beprojects.com wrote:
>>
>>    
>>
>>>With what config and what packet size?
>>>
>>>
>>>      
>>>
>>We originally wanted to tunnel voice traffic (using a pair of Rad boxes)
>>for a remote PBX across a 45MB/s link; packet size was 40 bytes. We have
>>since moved the voice to a dedicated T1, but the 2651's still
>>occasionally run out of CPU with normal day-to-day traffic. We put a
>>Packeteer on one side to look for anything unusual, but nothing "funny"
>>showed up.
>>
>>Here is a config from one of the routers:
>>
>>version 12.2
>>service timestamps debug datetime localtime
>>service timestamps log datetime localtime
>>service password-encryption
>>!
>>hostname pvd-gw
>>!
>>logging buffered 4096 debugging
>>!
>>memory-size iomem 15
>>clock timezone EST -5
>>clock summer-time EDT recurring
>>ip subnet-zero
>>ip cef
>>!
>>ip multicast-routing
>>ipx routing 000b.fdd8.6ba0
>>!
>>voice call carrier capacity active
>>!
>>mta receive maximum-recipients 0
>>!
>>buffers small permanent 85
>>buffers small max-free 122
>>buffers small min-free 25
>>buffers middle permanent 40
>>buffers middle max-free 57
>>buffers middle min-free 12
>>buffers big permanent 65
>>buffers big max-free 92
>>buffers big min-free 19
>>buffers verybig permanent 13
>>buffers verybig max-free 18
>>buffers verybig min-free 3
>>!
>>stun peer-name 192.168.254.134
>>stun protocol-group 1 basic
>>stun protocol-group 2 basic
>>stun remote-peer-keepalive
>>!
>>interface Loopback0
>> ip address 192.168.254.134 255.255.255.255
>>!
>>interface FastEthernet0/0
>> no ip address
>> load-interval 30
>> speed 100
>> full-duplex
>> fair-queue
>> hold-queue 250 in
>>!
>>interface FastEthernet0/0.1
>> encapsulation dot1Q 1 native
>> ip address 192.168.128.1 255.255.255.0
>> ip pim dense-mode
>> ip cgmp
>> ipx encapsulation NOVELL-ETHER
>> ipx network 358
>>!
>>interface FastEthernet0/0.252
>>!
>>interface Serial0/0
>> bandwidth 1536
>> ip address 192.168.254.130 255.255.255.252
>> ipx network 360
>> service-module t1 timeslots 1-24
>>!
>>interface FastEthernet0/1
>> bandwidth 46080
>> ip address 192.168.254.2 255.255.255.128
>> ip accounting output-packets
>> ip hello-interval eigrp 100 1
>> ip hold-time eigrp 100 3
>> load-interval 30
>> speed 100
>> full-duplex
>> ipx network 359
>>!
>>router eigrp 100
>> redistribute connected
>> redistribute static
>> network 192.168.252.0
>> network 192.168.254.0
>> no auto-summary
>> no eigrp log-neighbor-changes
>>!
>>router rip
>> redistribute eigrp 100 metric 3
>> network 192.168.128.0
>>!
>>ip classless
>>ip route 192.168.252.0 255.255.255.248 192.168.254.129 200
>>no ip http server
>>!
>>ipx router eigrp 200
>> network 359
>> network 360
>>!
>>ipx router rip
>> no network 360
>> no network 359
>>!
>>snmp-server community public RO
>>snmp-server enable traps tty
>>call rsvp-sync
>>!
>>mgcp profile default
>>!
>>dial-peer cor custom
>>!
>>end
>>
>>
>>-- 
>>Jim Littlefield            "I have a red sign on my door. It says,
>>                            'If this sign is blue, you're moving
>>                            too fast.'" - Steven Wright
>>    
>>
-- 
Jim Littlefield            "I have a red sign on my door. It says, 
                            'If this sign is blue, you're moving
                            too fast.'" - Steven Wright