[nsp] high cpu load on 2651

[Beprojects.com]

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
>
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